FEATURED NEWS

Is Additive Manufacturing Changing Heat Treat?

Source: Kanthal®

Heat treat methods are going to change in more ways than one, claims Dilip Chandrasekaran, head of R&D and Technology at Kanthal. “What we’ll see in the future as the industry grows is more automated processes where 3D printers feed parts into post-treatment. It will need to be smooth and streamlined, and the heating will need to perform different processes.”

Heat Treat Today brings you this quick, best of the web piece to keep you current with the latest insights in additive manufacturing.

An excerpt:

[blockquote author=”Kanthal®” style=”1″]The growth of additive manufacturing is creating new challenges in the field of heat treatment technology and prompting a shift toward electrification and greater flexibility from heat treatment equipment. These changes are expected to affect heat treatment in other industries too.[/blockquote]

 

Read More: “What Next for Heat Treat Technology”

 

 

All images provided by Kanthal.

Is Additive Manufacturing Changing Heat Treat? Read More »

$149 Million U.S. Navy Contract to StandardAero

HTD Size-PR Logo

Marc Drobny
President, Military Aviation
StandardAero.com

The United States Navy has awarded StandardAero a $149 million multi-year contract to provide engine maintenance, repair, and overhaul (MRO) services for Rolls-Royce T56 Series III engines powering the U.S. Navy and U.S. Marine Corps fleet of C-130s, C-2, P-3 and EP-3 aircraft.

The multi-year contract will continue into 2026 with the work being performed at StandardAero’s San Antonio and Winnipeg, Manitoba, Canada facilities. StandardAero was part of a Multiple Award Contract (MAC) on this program over the last five years, having recently completed option year four in support of this customer. Under the new contract, StandardAero will provide the same service experience the Navy and Marine Corps has received through the previous multi-year contract.

“We are thrilled to continue expanding our successful partnership supporting Navy and Marine Corps aircraft engine MRO,” said Marc Drobny, president of the military division at StandardAero. “Powering these aircraft is a strategic and logical continuation within our portfolio of services.

“Our employees, many of whom have served in the military, take great pride in serving the Navy – Marine Corps Fleet. As a former Naval aviator, I take great personal pride in our team’s ability to provide exceptional operational readiness through reliable and high-performing engines.”

StandardAero also supports the Rolls-Royce Series IV engines including support for the Marine Corps C-130J AE2100 engine and the Navy E-2D T56-A-427/A MRO requirements as a sub-contractor to Rolls-Royce.

 

 

 

 

 

 

 

 

(photo source: Military_Material at Pixabay )

 

 

 

 

 

 

 

 

$149 Million U.S. Navy Contract to StandardAero Read More »

Announcing: New HIPing Ebook!

Heat Treat Today is excited to bring you a NEW and FREE ebook this Technical Tuesday! 

In an ever-changing world where production efficiency, reduced environmental impact, and improved process reliability are in focus, some well-known technologies are seeing a renaissance. 

Hot isostatic pressing (HIP), is one such technology, which until now has been an essential process to densify porosity and improve the mechanical properties of materials for components. The outlook for HIP technology has never been brighter, helped by technology shifts that are accelerated by recent global events. 

In this book written with the expert insights of Quintus Technologies, explore high pressure heat treating through the many facets of hot isostatic pressing.

Get the FREE EBOOK here!

Announcing: New HIPing Ebook! Read More »

IHEA Monthly Economic Report: Dark Economic Clouds Cautiously Giving Way to Bright Recovery

“It is not that there is no longer anything to be concerned about as far as the economy is concerned, but the constant worries about whether the impact of the recession would fade seems to be ending. . . . The aggressive recovery predictions that were dismissed a month or so ago are now seen as the most likely.” This optimistic introduction leads February’s Industrial Heating Equipment Association’s (IHEA) Executive Economic Summary.

There are three factors that account for this enthusiasm, the summary reports. The first is the acceleration of vaccine distribution. “The US is now ranked number five in the world in terms of numbers vaccinated (behind only a few Asian states like Japan and Taiwan).” This has helped to reduce pandemic protocols. The second factor is that consumers have money and are willing to spend it. The summary states, “There is an estimated $6 trillion on the sidelines between consumers, investors and the business community. The consumer alone sits on over $2 trillion.” And finally, the third factor is tied to the money that will be infused into the economy by the $1.9 trillion stimulus/rescue plan.

The measurement of capacity utilization is a key indicator for future activity. It basically measures how efficiently a manufacturer is operating – do they have slack capacity in terms of either the machinery or their workforce? At the moment, the capacity numbers are a very long way from provoking inflation.

But, there’s that “what if,” hanging out there. The report cautions, “There is always a caveat when talking economics and that stimulus money is behind some of the trepidation regarding the future of the economic growth pattern. The risk from the stimulus is that it will overheat the economy and trigger a serious burst of inflation. If that surge in prices is dramatic enough, it could provoke the Fed to hike rates and start to put a damper on the growth we are starting to see.”

There are three prime motivators for inflation. The first one, wage inflation, hasn’t been an issue since there are still millions of people out of work. The second motivator, which has been manifesting dramatically is the price of commodities. They have been rising quickly–think oil and lumber prices. The third motivator is the money supply issue which could potentially lead to much angst. “The US economy is about to get hit with nearly $2 trillion just when there is substantial growth underway. This has the potential to set off a cycle of money chasing money. There will be a substantial part of the consumer population that will see some of this money and will be eager to spend it. If there is too much demand and not enough supply the price of things will go up.”

In conclusion, it will be interesting to see the response from the Fed–currently, there doesn’t seem to be a desire to hike rates– as well as the spending of the consumer. Will they continue to spend on services or for long-desired products? Hopefully, there are economic sunny days ahead.

The purchasing managers’ index is fairly volatile at the moment, but the good news is that the numbers have been consistently in the 60s for the last several months and anything over 50 is considered expansionary.

Check out the full report to see specific index growth and analysis which is available to IHEA member companies. For membership information, and a full copy of  the 12-page report, contact Anne Goyer, executive director of the Industrial Heating Equipment Association (IHEA). Email Anne by clicking here.

Anne Goyer, Executive Director of IHEA
Anne Goyer, Executive Director of IHEA

 

 

 

IHEA Monthly Economic Report: Dark Economic Clouds Cautiously Giving Way to Bright Recovery Read More »

Box Furnace for Annealing Firearm Barrels

Medium-Sized Floor-Standing Box Furnace
Source: L&L Special Furnace Company

HTD Size-PR LogoA leading Midwest manufacturer of custom firearms and rifles will use a medium-sized floor-standing box furnace for annealing gun barrels for rifles.

This is the second furnace from L&L Special Furnace Company that the manufacturer has acquired. This model is the L&L Model XLE 3636, which has a work zone of 34” wide by 30” high by 32” deep. It is designed for use with inert blanketing gas for atmosphere control to minimize surface de-carb.

Other features include a programmable flow panel with regulator and two flow meters for high and nominal flow rates along with a visual flow indicator light are included. There is a high-temperature air-cooled fan with packing gland to maintain the case seal integrity. A cast alloy hearth provides a good flat work platform for the fixturing of parts.

Honeywell controls and a Yokogawa recorder enable temperature control and chart representation of the furnace cycle. The power control is a series of solid-state relays and the furnace is constructed in accordance with NFPA86 compliance for safety.

 

 

 

 

 

(photo source: Vidar Nordli Mathisen at unsplash.com)

 

 

 

 

 

 

 

Box Furnace for Annealing Firearm Barrels Read More »

Heat Treat Radio #50: Justin Rydzewski and James Hawthorne on CQI-9 Rev.4 (Part 4 of 4) – Expert Advice

Welcome back to the show. Heat Treat Radio host, Doug Glenn, wraps up a four-part series on CQI-9 Revision 4 changes with Acument Global Technologies’ James Hawthorne and Controls Service Inc. Justin Rydzewski. In this final episode, both of these experts give their advice on how to navigate and comply with Rev 4.

To find the previous episodes in this series, go to www.heattreattoday.com/radio.

Below, you can listen to the podcast by clicking on the audio play button or read the edited transcript.

 


 


The following transcript has been edited for your reading enjoyment.

Doug Glenn (DG):  We're here today with Justin Rydzewski who is the director of sales and marketing of Controls Service, Inc. in Livonia, Michigan and also with James Hawthorne, heat treat specialist at Acument Global Technologies.  Both of these gentlemen have been with us for two or three of the last three episodes that we put together.  James, was the committee chair, I believe that's the right title, for the Revision 4, and Justin, of course, was right alongside on the committee getting things done.  Gentlemen, first off, welcome back to Heat Treat Radio.

Justin Rydzewski (JR):  Glad to be here.

James Hawthorne (JH):  Thank you, Doug.  Glad to be here.

DG:  We've covered a lot of the major changes, a lot of the main points that people ought to know, on the first three episodes.  We want to wrap it up today by asking a couple of very practical questions, a couple of “opinion” questions, but, I think, also a couple of very practical questions on implementation, and things of that sort, of the new CQI-9 Rev 4.

Justin, if you don't mind, I'd like to start with you and address an issue that I think you and I touched on in the very first episode, and that was the difference between the CQI-9 standard and AM2750F, specifically, about the automotive industry.  Why doesn't it just adopt AMS2750F as opposed to having this separate CQI-9 standard?

Episode 1 of 3 of AMS2750 series

JR:  I think that both specifications are appropriate for their industries.  But, there are some significant differences between the two.  First and foremost, one is intended for aerospace and the other for automotive.  AMS2750F, as we've mentioned in a previous episode, is a pyrometry standard, whereas CQI-9 is a system assessment; it is a process-based approach to things, whereas AMS2750 is more equipment based.  You classify things by temperature tolerances, by the instrumentation type that you have, whereas requirements within CQI-9 are generally based on your type of process and specific to your process, in particular.

I would say that the most significant difference between the two documents is AMS2750 is part of the NADCAP program and requires accreditation and an auditing body, PRI, to come out and say, “Yep, you're good to go.  Here's your certificate.  We'll see you in a year”.  CQI-9 is intended to be a self-assessment.  It's intended for heat treaters to implement themselves to provide them with a process of managing their heat treat and that doesn't require somebody to come in and accredit them and hand them a certificate.

There is a big difference between the two; they are not equals.  There are similarities, especially in the pyrometry section.  At one point, AMS was heavily sited inside of CQI-9.  Since its removal, however, we've had success, and that success has been measurable; it's been significant.  I would image that the OEs have been rather happy with what it is that they have there in the document, especially in the 4th edition, and I think that the thought of going to an AMS2750 and abandoning CQI-9 is well outside the realm of plausible.

JH:  One thing I would add here is, if you read the headers for each section of the HTSA, section one is “Management Responsibility and Quality Planning”, section two is “Floor and Material Handling Responsibilities”, and section three is the equipment.  On the equipment side, you're going to get more into the pyrometry side of things- the metrology and the maintenance specifics to that equipment, as well.  So, the all-encompassing HTSA is a system that is a management system, or at least a system that you can develop a management system based behind, and ensure compliance.

DG:  For those who are just joining on this episode, HTSA, heat treat system assessment, is one of the main parts of the CQI standard.  Justin, I think your point is good.  James, I think, as well, the point is well taken.  CQI-9 is meant to be an internal tool, a continuous improvement tool that helps a company that is involved with heat treating to continually improve their process.  AMS2750F specifically, is pretty much exclusively a pyrometry certification program, where you've got to have somebody coming from the outside.  I remember, back in the day, when they were first starting one of the QS standards, they said, no longer are you going to have to comply or get qualified by this OE, or this prime, or this prime, now you can have one standard.  Has that been the case here?  Has it been effective in the automotive industry, CQI-9?

JH:  I think, 100%, Doug.  It's like IATF – all of the automotive industry has to be compliant to that.  Same thing with CQI-9.  It provides that commonality for all heat treaters in all the different processes that are employed at their facilities, or the multiple facilities that they may have.  For a company like ours, we have 8 companies in North America.  For the North American side of things that have heat treat furnaces in them, we have induction furnaces, we have carbonitriding furnaces, and we have stress relief furnaces.  So that commonality even helps us internally with our management system and how we take steps to provide that common approach and compliance to CQI-9.

[blockquote author="Justin Rydzewski" style="1"]The CQI-9 intent largely was that this is something that you can do yourself and implement yourself.  We'll provide you with the guidance and put it in simple terms and give you all the research you need to support this on your own.[/blockquote]

JR:  I think that also bodes well, up the ladder as well, for the OEs.  The more commonality that exists in the industry, the wider that, for lack of a better term, talent pool is.  The more people, the more sources that you can go to in order to have work done and have it what you expect it to be, from a quality standpoint.

I think one of the things that CQI-9 has done really well is they've made a concerted effort to make that document easier to understand and to simplify things down to just its bare bone necessities, whereas some of the other specifications that exist in industry can be lacking.  There is a real good reason why a lot of the work of some of those other pyrometry specifications out there are outsourced, because the expertise to adhere to those things and be confident that you're adhering to those things is possessed by an in-house team; they have to go outside.  The CQI-9 intent largely was that this is something that you can do yourself and implement yourself.  We'll provide you with the guidance and put it in simple terms and give you all the research you need to support this on your own.

Justin Rydzewski, James Hawthorne, and Doug Glenn (clockwise from the left) sat around the virtual screen to hash out a few final expert opinions on CQI-9.

DG:  I'm pretty sure, based on everything we've talked about, that you guys really like CQI-9.

JH:  100%!  I embrace it and our company embraces it.

DG:  So, I know you guys like it, you're the main cheerleaders.  What is your perception about companies outside of yourself?  Has it, in fact, been embraced, or has it kind of been “Heisman trophied”, the stiff arm – “We'll embrace you with one extended arm”.

JH:  If I may, I will say that it's been embraced across the industry through all heat treaters.  I think anywhere that anybody deemed it to be a burden, I think with the changes to the format, the added clarity, the improvements to the document, the knowledge base that's now been updated in the glossary, it is all going to help those guys cross any bridge that they were struggling with and make it better for them.

I believe we touched on a little bit in one of the past episodes, or maybe it was when Justin and I were talking about this offline, but one of our customers, who is a non-automotive customer, embraces CQI-9 and our systems and our approach to our heat treat.  That is a huge step because that particular company has a lot of internal specification as it pertains to heat treat, but CQI-9 is either equal to or exceeds what their expectation is.  It makes it easy for them to embrace it.  That was one of the things that was brought up in the roll-out presentation we did through AIAT – one of the other industries had mentioned they were following it.

DG:  It sounds like, overall, it has been fairly well embraced and this Rev 4 is going to make it even easier to cuddle up with a cup of hot cocoa and feel comfortable with it.

JR:  Generally speaking, in my travels, I have two categories of people that I come across.  You have the sort that is looking to embrace it.  They recognize that it's a “have to do” and they just want to know what the rules are.  They want to make sure that they understand what the rules are and that they make sense.  Maybe there is a point or two that they take exception to about, not fully understanding what the intent is of it, but, for the most part, by and large, they want to adhere to the requirements.  They recognize that they need to.

The other category includes those who fight anything that they're asked to do, no matter what it is.  “No, I don't want to do that.  We've been doing it this way forever.  Convince me, show me, that I'm doing it wrong.  I do some sort of subsequent testing and it always come out fine.  I've never had any complaints.  Why do I have to go do this?”  While that group is definitely the minority, I can tell you that that group, almost 100% of those people are going to be those types that you find more issues with than any other.  That's because they fight it and they try to find ways to circumvent things.  That's a real slippery slope there.

I think CQI-9 does a real good job at trying to keep things in its lane and recognize that if there's something that we're asking the heat treater to do, that that requirement needs to provide value on some level, or it needs to mitigate risk on some level, and a meaningful one at that.

You asked, “Do I like CQI-9?”  I like AMS2750 too.  There are some things in AMS2750 I like better than what we did in CQI-9.  Talking from experience of having to write some of the requirements in the document, and how difficult that can be to say what it is you want to say but in a manner that makes sense outside of your own brain, it's difficult.  I think AMS states some things very, very well.  I like their thermocouple calibration certificate requirements better than ours; I think they're more detailed.  But I think both work really well, and embracing it sometimes just requires a bit of an education or an understanding of the intent side of things, the purpose side of things.

DG:  When was CQI-9 Rev 4 released?

JR:  The last week of June.

DG:  It's been going on for months now.  How about timing?  I would imagine that a lot of people that are listening to this probably know that they need to comply with certain aspects of CQI-9.  What is the timing for them?  When do they need to have all their ducks in order?

JH:  During the roll out presentation, the OEMs made a joint statement.  We did that roll out presentation in September, and they essentially said that the time between the June release and that (roll-out) presentation was the grace period.  When the 3rd edition expired, you have to do 4th edition assessment and they will no longer accept 3rd edition assessments at that point.  So, whenever your expiration is, you shall do it to the 4th edition.

JR:  The 3rd edition is officially obsolete.

DG:  So if you're doing another assessment, it's going to be a Rev 4 assessment.  Are there any other timing issues that people need to be aware of?

JR:  That should pretty much cover everything.  If you're outsourcing an element of your service or of a material, you should be specifying adherence or conformance to the 4th edition at this point.

DG:  So, James, I want to address this next question to you, if you don't mind.  I know you said in your organization, you've got how many North American locations?

JH:  8 plants in North America.

DG:  OK, 8 plants.  And you've, obviously, rolled out Rev 4.  How did you handle the transition?  How did it go?  What was complicated and difficult, and how did you address it?

JH:  For me, I think it's a little easier, because I was in the room while we were writing the 4th edition.  The heat treat systems for all of our locations, I wrote.  So, I have a very unfair advantage.  But, that being said, even knowing and being as intimate as I am with our own system and the 4th edition of CQI-9, we have made a concerted effort to slow down the process of doing the heat treat system assessment and slow down the process of doing the job audit and doing the process tables to ensure that we are capturing everything.

We've made this statement many times, whether it was here with you or if it was through our roll-out presentation, it is essential to read this document.  It is essential to understand what's happening in it.  If it takes just a little bit of extra time to read a little bit further to do the checks and balances, pop into the glossary, just to make sure that you are answering the questions as compliant as you possibly can, is the most important thing.

A wise man told me once, Compliance is a circle and if you're just outside the circle, all I want you to do is get you just inside the circle.  And next year I'm going to tighten the circle a little bit and if you're still sitting outside, we're going to move you inside.  You don't have to hit a bullseye every time, but you have to be inside the compliance circle.  So, if you understand that, and if you manage it that way, it's going to make it easy and more effective.  Then, you can stick to the intent of the document, and the intent of the document is within the acronym itself of CQI-9: it's continuous quality improvement.  Never take your foot off the pedal.

Source: Heat Treat Today

DG:  Right.  It never ends.  Justin, how about you?  Same question.  I know you're going in through your company into a variety of other companies who are trying to comply.  What are you seeing, from their perspective, as far as the difficulty?  How are they handling it?

JR:  I think the most difficult aspect of things, I guess, is probably one of the most obvious: implementation.  You've been doing it one way for the last 8-9 years and now we're going to need to implement something new.  And when do you want to implement something new?  It's really nice when you work for an organization that has process specifications and certain test specifications very well defined, because then you can hold onto them and say, “Here are the things that we were doing,” and you can go through them and see where things need to be different.

Where they're less defined, or they're defined in some manner that is not on the forefront of things – like I define things in a quote or in a purchase order – those become difficult. There could be elements of implementing something too soon, and now, all of a sudden, I violate something that they've done internally, or sometimes if they had it stated internally for a requirement.

For us, the most difficult thing has been the implementation side of things.  It's meant a lot of conversations and trying to determine what this is going to look like, what things we are going to need to do differently, what things we want to check on, and the finally to, for lack of a better word, “coach” my customer along.  Here are things you need to consider, here are things you might need to do differently, here's how I would state it for the new edition for making revisions.  But to the horse that has been thoroughly well beaten, you have to read the document.

The CQI-9 audio book, coming soon, we'll have that on tape for you.  Whether you're driving to work or putting your kids to sleep, it will work either way.

DG:  Last question for you guys.  For a company who's wanting to become CQI-9 compliant, what are some of those must do's and what are some of the practical advice you've got for them as they start down that path?

JH:  If, I may, I think the first and most important thing there is to evaluate the talent that you have on site.  Who is your in-house expert?  Who is the guy that most fits what you need to be the driver of those next steps?  As long as you have that, and that guy understands your system, then the journey can begin and I think your process is more linear with less hills and valleys.  You start to win, and you start to win with less drop-off, and that's what you want to do.  First and foremost, have the right guy in place.

[blockquote author="James Hawthorne" style="1"]First and foremost, have the right guy in place. [/blockquote]

DG:  So, in your estimation, James, you're saying it's a personnel issue.  Right away, make sure you do a good assessment and get the right guy in the spot to oversee the process.

JH:  Right.  You don't want to be a commercial heat treater and you just hired a quality manager from a widget factory to come be the champion of your heat treat.  You want him to be a heat treater.  You want to have a heat treater in place that knows his stuff.

DG:  Right.  And who has an attention to detail, I'm sure.

JH:  I think it's important to the extent of what Justin was just talking about is, when that person talks to his suppliers, his service providers, you want to have somebody that has some wherewithal and understanding in that field so when that communication does take place, and you have folks like Justin and others in his field, trying to help educate the heat treater on what it takes to be compliant with, whether it's reporting, whether it's through the process or whatever, having that understanding is going to make even the service provider’s job easier.

JR:  I think that organizations that struggled with the 3rd edition are probably going to continue to struggle with the 4th edition.  If you're comfortable with the 3rd edition and you're doing well with the 3rd edition, the 4th edition is going to be relatively easy to adapt to and to implement.  Like with any math story problem, you've got to write down what it is you know.  So you go through the document itself, you start making notes on things, you start citing where things might need to be different, you start red flagging things, you review what you have, may do a Ctrl + F for any mention of 3rd edition and replace with 4th edition, or something simple like that. It is what you have created and try to continue on with the successes you had for the 3rd edition into that 4th one.  If you've struggled with the 3rd edition, the likelihood that you're going to struggle with the 4th is also pretty great.  It is likely that the document isn't the issue, the issue is likely a lack of awareness.

It cannot go understated how valuable it is to invest in training, especially if you're bringing some new guy on to champion the effort, or if you've got a team that's eager and hungry and looking to prove their worth – get them trained.  It's readily available.  Our organization offers it, the AIG offers training on the HTSA side of things; there are plenty of organizations out there that will offer this training.  The benefits to working with a high-end service provider in many of these regards, is that they'll help you through the process as part of their service offering.  That's how the true value of a good service provider can be measured is in these sorts of situations.  I'd lean on your experts.  Invest in your staff.  Get the training to get everyone up to speed.

Again, if you fought it in the 3rd, and your plan is to fight it on the 4th, it's going to be an unenjoyable road and you might need to figure out ways to embrace what it is you know and acknowledge what it is you don't, and then fill those gaps in so that you can get to where you need to go.

 

 

 

 

 

 

 

Doug Glenn, Publisher, Heat Treat Today

Doug Glenn, Heat Treat Today publisher and Heat Treat Radio host.


To find other Heat Treat Radio episodes, go to www.heattreattoday.com/radio.

Heat Treat Radio #50: Justin Rydzewski and James Hawthorne on CQI-9 Rev.4 (Part 4 of 4) – Expert Advice Read More »

When Heat Treat and St. Patrick’s Day Collide…

op-edWhen heat treat and St. Patrick’s Day collide, Heat Treat Today editors have a little fun. Today’s post is inspired by furnaces and Ireland. Happy St. Patrick’s Day, and enjoy the hot topics!


| The Irish Turf Fire |

Have you heard of this heat treating solution? The fuel for this furnace is turf. “Turf is dried-peat and was a primary fuel source for Irish people for thousands of years[…] In the past, Irish people used turf to heat their homes and cook their food. Turf was harvested from a bog. Cutting turf by hand is a laborious task.” Not sure your general manager will let this one by... (Mairead Geary, “Smell of an open fire in Ireland is intoxicating but what is Irish turf?” IrishCentral)


| Irish Terms |

Here are some Irish and Gaelic terms that a heat treater may want to use instead of the same ol’ same ol’. Just for today. Search more options for yourself here.

  • Cóir teasa: heat treatment
  • miotaleolaíocht: metallurgy
  • foirnéis: furnace
  • prásáil: brazing
  • gaibhnithe: forging
  • ainnéalta: annealing

| Heat Treatment in Ireland |

Content at Heat Treat Today is focused on the North American heat treat industry, however, we would be remiss if we didn’t highlight heat treatment going on in Ireland.

For a featured in-house heat treater, “medtech” company Stryker has heat treat processes going on at their Ireland R&D base in Cork. After a commitment to invest in three facilities in Cork, Stryker’s Spencer Stiles said, “Our team in Ireland has built considerable research and development and new product development capabilities through the partnership of multiple divisions over the past 20 years in an effort to serve multiple market segments.”

Screen Capture of Stryker’s Landing Page

BOC is a provider of industrial, medical and special gases in Ireland and has been producing atmospheric gases, including oxygen, nitrogen and argon in Ireland for over 70 years.

Source: About BOC, a member of Linde Group

While you may not have heard of these heat treater providers, they are a member of the international Linde Group.

A heat treatment service provider, Hi-Life tools has been providing heat treatment service for a wide range of Irish based tool making, engineering and medical device companies for more than 20 years.

Source: PTG webpage

The company, part of Precision Tool Group, has built up a vast amount of experience of heat treating a wide range of metals from tool steels, stainless steels, and exotic metals. These can be treated using the standard processes or a custom made process can be developed to suit the customer requirements.

| Irish Voices: Winter, Fire, and Snow |

Thankfully, winter and snow are melting away, but fire remains! Listen to this beautiful ballad sung by Irish Tenor, Emmet Cahill. If you want to listen to a full playlist of Irish folk music, check out The High Kings.

 

 

 

 

That’s all for now, Happy St. Patrick’s Day!

Heat Treat Today Team

 

 

 

When Heat Treat and St. Patrick’s Day Collide… Read More »

Industrial Gases: Advancing 3D Printing Processes for Aerospace

OC

Curious about proper gas atmospheres needed to meet high-tolerance standards for additive manufactured parts before, during, and after the heat treating process?

Learn about them in this detailed original content article from Heat Treat Today’s Aerospace 2021 print magazine. The author, Lisa Mercando, Ph.D., is the marketing manager of strategic marketing & development at Air Products. You can access the other articles in our digital edition here. Enjoy the Technical Tuesday!


Lisa Mercando - Air Products - BRANDED - provided by Air Products
Lisa Mercando, Ph.D.
Marketing Manager, Strategic Marketing & Development
Air Products

In a world of rapid prototyping and production of metal components, it is imperative to have the proper gas atmosphere to produce quality parts. Argon, nitrogen, and helium are commonly used to create inert atmospheres in order to meet the high-tolerance standards required for additive manufactured (AM) aerospace parts. Industrial gases are used every step of the way from powder production to various additive manufacturing techniques to finishing processes that include heat treating and hot isostatic pressing (HIPing).

Inert gas atomization is the best method to obtain dense, spherical particles, which are best for AM applications where the desired particle size is usually less than 100 microns. Additionally, inert gas atomization greatly reduces risk for oxidation, providing a high level of powder purity and quality. Helium provides the best results when its superior heat transfer capabilities are needed. This process achieves the following properties: dense and spherical particles; high quality and purity metal powders; and narrow particle size distribution. We can provide high pressure gases for powder atomization and hydrogen-based atmospheres for powder reduction and annealing.

Image demonstrating metal additive manufacturing

To meet the high-tolerance standards required in additive manufacturing–particularly for aerospace–nitrogen and argon are commonly used to provide inert atmospheres. The use of helium, with its high thermal conductivity, offers an interesting option for minimizing the thermal distortion of elongated parts during printing. An inert atmosphere provides numerous benefits on a printed part by:

  • reducing oxidation of printed parts by lowering the oxygen concentration in the build chamber
  • improving safety through the inerting of combustible dust during powder handling and sieving
  • creating a stable printing environment by maintaining constant pressure in the print chamber
  • mitigating powder clumping in the feed tube
  • preventing part deformation by controlling thermal stress through effective cooling

Gas requirements differ based on the process being used and the material being printed.

Often, AM aerospace parts require additional processing to achieve the desired final properties. This is done mainly in the form of heat treating, sintering, or HIPing. All three processes have industrial gas requirements for preventing oxidation. Heat treating with argon, nitrogen, hydrogen, or a nitrogen/hydrogen blend can relieve internal stresses and enhance part properties such as strength, ductility, and hardness. In sintering applications, nitrogen/hydrogen blends or argon/hydrogen blends are important in producing near-net shape parts with increased strength and uniformity. High pressure argon is used in HIPing applications to provide fully dense parts with increased strength and reliability.

Image of a furnace heating metal parts

In addition to providing the bulk industrial gases required, the company has developed state-of-the-art process intelligence systems. These systems monitor atmosphere composition parameters to ensure the process is running with the desired gas atmospheres and provide alerts for any needed maintenance or adjustments. Decades of metals processing experience in gas supply, applications, process knowledge, and safety are applied to help improve heat treating efficiency and part quality.

Remote tank monitoring is one example of the company’s Process Intelligence™. Operators increasingly rely on data to closely track critical process parameters, such as the use and inventory of vital industrial gases. This tank monitoring system enables operators to remotely check their supply levels and monitor usage from a touch screen in the plant, on their laptop, or on their mobile device. Customized daily reports are a common way to stay current on their industrial gas supply.

For heat treatment operations using a furnace atmosphere that is flammable or potentially flammable, an inert purge gas – typically nitrogen – is utilized to help ensure safe operation. This system alerts operators to the condition of the liquid nitrogen supply and helps them remotely track their supply and usage of gases. Optional system alarms allow operators to safely initiate a controlled purge shutdown, enabling compliance with NFPA 86 by confirming they have adequate liquid storage levels, or ensuring their nitrogen piping temperature remains at a safe level. Typically installed near the furnace operation, the remote touch screen on the base station displays conditions of all bulk gas storage tanks and can use both audible and visual alarms to warn the operator of a potentially critical situation.

Tank Monitoring

In addition to using inert gases, such as nitrogen and argon for the 3D printing processes, GE Additive Manufacturing, located in Cincinnati, OH and a major manufacturing center for additive manufacturing, also performs post processing heat treatment/sintering on the metal parts to enhance part quality. Their capabilities allow for the production of quick, precise parts with high levels of accuracy, even on intricate shapes and geometries across multiple applications.

Conclusion

If you are prototyping and producing metal components, be sure to consider the importance of achieving the optimum gas atmosphere to efficiently make quality parts. The heat treat postprocessing of AM metal parts is often required to produce the high-quality parts specified for the aerospace industry.

About the AuthorDr. Lisa Mercando is the marketing manager, Strategic Marketing & Development, for Air Products’ metals processing industry. She has worked at Air Products for 28 years in a variety of roles and responsibilities and is the author of several patents and technical articles.

All images were provided by Air Products.

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Excess Air: Its Role in Combustion and Heat Transfer

Excess air plays multiple roles in heat treating systems. Learn about its importance in combustion and heat transfer, and why being well-informed will help your system run at peak performance.

This original content article, written by John Clarke, technical director at Helios Electric Corporation, appeared in Heat Treat Today’s Aerospace March 2021 print magazine. See this issue and others here.


John B. Clarke
Technical Director
Helios Electric Corporation
Source: Helios Electric Corporation

Is your system running optimally? The following discussion will provide a better, albeit abbreviated, understanding of the role of air in combustion and heat transfer.

Excess air in heating systems plays many roles: it provides adequate oxygen to prevent the formation of CO or soot, can reduce formation of NOx, increases the mass flow in convective furnaces to improve temperature uniformity, and at times, wastes energy. Excess air is neither good nor bad, but it is frequently necessary.

To begin, we must first look at a basic formula. For our discussions, we will replace natural gas, which is a mix of hydrocarbons with methane (CH4). The oxygen (O2) is supplied by air.

The above simplified formula describes perfect or stoichiometric combustion. The inputs are methane and air (where only the O2 is used to oxidize the carbon and hydrogen in the methane), and the products of combustion (POC) consist of heated carbon dioxide (CO2), water vapor (H2O) and of course nitrogen (N2). (The actual reaction is far more complex and there are other elements present in air that we are ignoring for simplicity.) As we can see from the equation, the oxygen we need to burn the methane comes with a significant quantity of nitrogen.

In practice, it is very difficult to even approach this stoichiometric or perfect reaction because it would require perfect mixing, meaning that each molecule of methane is next to an oxygen molecule at just the right time. Without some excess air, we would expect some carbon monoxide and/or soot to be formed. Excess air is generally defined as the percent of total air supplied that is more than what is required for stoichiometric or perfect combustion. For natural gas, a good rule of thumb is to have about 10 cubic feet of air for every one cubic foot of fuel gas for perfect combustion. Higher air/fuel ratios, say 11:1, are another way of describing excess air.

In most heating applications, the creation of carbon monoxide and other unburnt hydrocarbons should be avoided, except in the rare cases where they serve to protect the material being processed. Employees must be protected from CO exposure; and soot can damage not only equipment, but the material being processed.

Source: Heat Treat Today

The amount of excess air that is required to find and combine with the methane is dependent not only on the burner, but also on the application and operating temperature as well. Some burners and systems can run with very little excess air (under 5%) and not form soot or CO. Others may require 15% or more to burn cleanly. Just because a burner performs well at 10% excess air in application A, does not necessarily mean the same level is adequate in application B.

Once the quantity of air exceeds what is needed to fully oxidize or burn the methane, combustion efficiency will fall because the added air contributes no useful O2 to the combustion process, and it must be heated. It is very much like someone putting a rock in your backpack before you set out for a 16-mile trek. Taking this analogy further, higher process temperatures equate to climbing a hill or mountain with that same rock — the higher the climb, or the higher the process temperature, the more energy you waste. Sometimes this added weight or mass can be useful.

The higher the excess air, the greater the mass flow. In other words, the total weight of the products of combustion goes up, and the temperature of the CO2, H2O, N2, and O2 goes down. If we are trying to transfer the heat convectively, this added mass or weight will provide improved heat transfer and temperature uniformity. A simple way to think of temperature uniformity is that the lower the temperature drop between the products of combustion and the material being heated, the better the temperature uniformity. Many heating systems are specifically designed to take advantage of this condition – higher levels of air at lower temperatures. This is especially true when convective heat transfer is the dominant means of moving heat from the POC to the material being heated (when the process temperature is roughly 1000°F or lower).

Source: Heat Treat Today

Some heating systems are specifically designed to operate as close to perfect combustion as is possible as the material is heated then switch to higher levels of excess air to increase the temperature uniformity as the setpoint temperature is approached. In other words, it provides efficient combustion when temperature uniformity is less of an issue and a very uniform environment as the material being processed nears its final setpoint temperature.

Of course, a system can be supplied with too much air, which can waste energy, but also prevent the system from ever reaching its setpoint temperature. The energy is insufficient to heat all the air, the material being processed, and compensate for furnace or oven loses. In these instances, it is obvious that we must reduce the air supplied to the system.

In indirect heating systems – where the products of combustion do not come in contact with the material being processed, like radiant tubes, for example — air in excess of what is required for clean combustion provides limited benefit and should generally be avoided. In these systems, it is best to play a game of limbo, “How Low Can You Go,” so to speak. Test each burner to see how much excess air is required to burn clean and add a little bit for safety. Remember, if you source your combustion air from outside in an area with significant seasonal variations, the blower efficiency will change, and seasonal combustion tuning is required.

Lastly, some burners require a minimum level of excess air to operate properly. This additional air prevents critical parts of the burner from overheating – or the air may limit the formation of oxides of nitrogen (NOx). In this application, altering the burner air/fuel ratio could generate excessive pollutants or even destroy the burner.

Efficiency is important, but the process is king. There is no magical air-to-fuel ratio and no single optimum level of excess air in the products of combustion. Each application is unique and must be thoughtfully analyzed before we can confidently say we have optimized our level of excess air. But careful attention paid to the effect that excess air has on your fuel-fired systems will pay dividends in improved safety and efficiency.

About the Author:

John Clarke, technical director at Helios Electric Corporation, a combustion consultancy, will be sharing his expertise as he navigates us through all things energy as it relates to heat treating equipment.

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SITES Medical Expands Manufacturing Capabilities

HTD Size-PR Logo

Greg Stapcup
CEO/President
SITES Medical
Source: SITES Medical website

SITES Medical has ordered two vacuum furnaces, expanding their heat treat capabilities. SITES Medical is an orthopedic technology development company that invents and de-risks new technologies, and the furnaces will aid them as they collaborate with OEMs to bring technologies to market and drive mutual growth.

The new furnaces from Ipsen will accommodate increased volume resulting from growth in business. Each has a work zone size of 24” wide x 24” high x 36” deep with an all-metal hot zone. The furnaces will be used for orthopedic implant processing such as stress relieving Ti and CoCr components, as well as diffusion bonding of Ti and CoCr implants.

"After reviewing the options available for thermal processing solutions," said Greg Stalcup, president/CEO of SITES Medical, "we elected to purchase the Ipsen TurboTreater® vacuum furnaces due to their high quality and reliability."

 

 

Ipsen TurboTreater® Model H3636
Source: Ipsen USA

 

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