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Vacuum Heat Treating for Space Exploration

BOTW-50w Source:  Solar Atmospheres

Vacuum furnaces are highly flexible tools capable of providing numerous thermochemical conditions with various reactive gases at elevated temperatures and extreme pressures to alter the chemical or mechanical properties of materials.  Conditions inside vacuum furnaces are equivalent to conditions found on the planets in our solar system.    Each planet in our solar system is unique in terms of its atmospheric contents, pressures, and temperatures.  One planet with unique atmospheric conditions is Venus.

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NASA Releases Dozens of Patents into the Public Domain

Washington – NASA has released 56 formerly-patented agency technologies into the public domain, making its government-developed technologies freely available for unrestricted commercial use. In addition to the release of these technologies, a searchable database now is available that catalogs thousands of expired NASA patents already in the public domain.
These technologies were developed to advance NASA missions but may have non-aerospace applications and be used by commercial space ventures and other companies free of charge, eliminating the time, expense, and paperwork often associated with licensing intellectual property. The technologies include advanced manufacturing processes, sensors, propulsion methods, rocket nozzles, thrusters, aircraft wing designs, and improved rocket safety and performance concepts.
“By making these technologies available in the public domain, we are helping foster a new era of entrepreneurship that will again place America at the forefront of high-tech manufacturing and economic competitiveness,” said Daniel Lockney, NASA’s Technology Transfer program executive. “By releasing this collection into the public domain, we are encouraging entrepreneurs to explore new ways to commercialize NASA technologies.”
This patents release is the latest in NASA’s long tradition of extending the benefits of its research and development into the public sector, where it may enhance the economy and quality of life for more Americans. The release also may help familiarize commercial space companies with NASA capabilities and result in new collaborations with private industry.
The innovations included in this transfer were selected by NASA officials using a rigorous review process, during which decision-makers looked for technologies that offer the potential for high unit values but are less likely to be licensed by outside companies because of low demand for resulting products (for example, spacecraft), or the technology still requires significant development before it is marketable.
A few examples include:
  • Inventions related to rocket nozzles, injection systems, and propellants that might help launch a new generation of commercial spacecraft
  • Methods for controlling airflow around vehicles in hypersonic flight
  • Technologies designed to mitigate the dangerous gases created as humans live and work in space
NASA’s patent portfolio, managed by the agency’s Technology Transfer Program, includes more than 1,000 technologies in categories such as manufacturing, optics and sensors, and is available for industry use through licensing agreements.

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GM Dumps Korea as Source for 2017 Holden Commodore

BOTW-50w Source:  Wheels

“The same factor that pushed General Motors  to quit building the Holden Commodore in Australia – the high cost of labour – appears to have led it to dump a decision to build the first-ever fully imported Holden Commodore in Korea.”

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FDA Has Important New Views on 3-D Printed Devices

BOTW-50w Source:  MPMN Medtec Pulse

The FDA has released “leapfrog” draft guidance for the rapidly evolving world of 3-D printed medical devices.

The agency based the guidance on input from device manufacturers, 3-D printing companies, and academics who testified at a 2014 hearing. The document covers device design, manufacturing, and design testing. For the purposes of the draft, FDA identified four main types of 3-D printing—powder fusion, stereolithography, fused filament fabrication, and liquid-based extrusion.

Manufacturers would have to clearly identify every step in the 3-D printing process, and might need to submit a “high-level summary of each critical manufacturing process step,” the guidance says. They would also have to document each step’s risk, and describe how they would mitigate those risks.

Read More:  FDA has Important New Views on 3-D Printed Devices

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7 Recent Medical Device Failures Catching FDA’s Eye

BOTW-50w Source:  QMED – Qualified Suppliers to the Medical Device Industry

“The FDA last month designated a Medline Industries guidewires recall as Class I.

The Medline guidewire is identified as the ACME Monaco Guidewire .035×150 3MMJ TCFC item number 88241, with affected products distributed between March 2013 and August 2013.

The guidewire is used in various surgical convenience kits assembled and marketed by Medline Industries. It is meant to fit inside a percutaneous catheter for the purpose of directing the catheter through a blood vessel.

The guidewires in question, however, have the potential for the coating to flake off of the wire, according to the FDA.”

Read More: 7 Recent Medical Device Failures Catching FDA’s Eye

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Plastics and Metals Team Up in Medical Device Apps

BOTW-50w Source:  MPMN Medtec Pulse

“… to be able to deliver devices with ever-increasing performance levels, medical device manufacturers continue to face many design challenges and requirements. Propelling these requirements is the unrelenting trend toward minimally invasive procedures, requiring smaller and smaller devices made from a range of microcomponents, and the trend toward increasing medical device connectivity. As a result, there is a growing need to unite plastics and such metals as stainless steel, although they used to be fierce competitors.”

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Stryker’s Spine Division to Debut 3D Printed Tritanium Posterior Lumbar Cage Spinal Implant

BOTW-50w Source:  3D Print.com

“Stryker’s proprietary Tritanium technology has now been applied to spinal implants designed to encourage healthy regrowth of the bone tissue, and to reduce any strain or damage caused by being implanted. The Tritanium Posterior Lumbar (PL) Cage is a 3D printed intervertebral body fusion device that was developed to help patients dealing with lumbar spinal fixation due to ongoing back problems brought on by degenerative disc disease.”

Read More:  Stryker’s Spine Division to Debut 3D Printed Tritanium Posterior Lumbar Cage Spinal Implant

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Record Gas Quenching Speeds Achieved in Ipsen’s ARGOS Heat Treating System

KLEVE, GERMANY – Ipsen’s Global Development Team recently celebrated the first build and testing of the ARGOS heat-treating system. The ARGOS uses low-pressure carburizing (AvaC®) in combination with 20-bar nitrogen quenching to provide metallurgical properties never before seen in gas quenching systems – even those utilizing 20-bar helium quenching. One industry visitor who witnessed the test run commented, “The ARGOS is likely the fastest inert gas quench furnace in the world.”

This initial test was performed on one of the most difficult to quench vacuum carburized components: layshafts for large gears. Until now, helium gas, which is both expensive and declining in availability, was required to fully transform parts with very high cross-sectional thicknesses.

Test outcomes showed that the shafts processed in the ARGOS system with 20-bar nitrogen quenching achieved higher surface hardness and core hardness values than shafts processed in the existing vacuum heat-treating furnaces that use 20-bar helium quenching. The ARGOS heat-treating system also offers several benefits, including:

  • Flexible installation with a selectable number of carburizing, nitriding, subzero and high vacuum process chambers with a nitrogen gas and/or oil quench module
  • Excellent temperature uniformity during heating and cooling
  • Minimal and controllable distortion due to temperature homogeneity throughout the entire load and the reversible gas flow during cooling
  • Extremely high gas velocity and volume due to Ipsen’s unique cooling system design

Overall, the ARGOS furnace line represents a significant milestone in the growing trend to operate low-pressure carburizing (LPC) lines in combination with inert gas quenching.

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Improved Materials and Enhanced Fatigue Resistance for Gear Components

BOTW-50w Source:  Thermal Processing for Gear Solutions

“When trying to improve fatigue properties, two important areas need to be addressed: improvements of material and improvements in heat treatment technology.”

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2200°F Conveyor Oven Supplied for Aquatic Heating Systems

Baker Furnace, Inc. shipped a custom-built, high-temperature conveyor oven designed to heat treat rods used to manufacture commercial heating elements.  The process also requires a nitrogen purge to create a specific atmosphere.

At 35 ft long with an operating temperature of 1900°F, the engineering challenges for this unique application were a combination of the size and high temperature coupled with the fact that the application required four different heating zones with a nitrogen injection in every zone.

The electrically-powered conveyor oven was constructed as a modular system which allowed Baker Furnace to conduct a complete test on site and then break it down to ship and install in the most cost-effective manner.   The first two zones for heating measure 24”w x 16”h x 12’L while the two cooling sections measure 24”w x 16”h x 20’L, both with nitrogen injection supply lines to create an inert atmosphere. The oven is equipped with a 24” wide inconel wire woven belt supported by an internal inconel slider bed, which is driven with a gear reduction motor (speed controlled by Allen Bradley drives).  Using formed rod-style, Kanthal elements rated at 60kW for heating, the entire system is controlled with an Allen Bradley touch screen HMI and Allen Bradley PLC software.

“Designing a conveyor oven of this size and temperature is a challenge in itself, but our biggest hurdle came when we had to achieve a plus or minus 25°F heat uniformity within the multiple zones.  Each zone required different temperatures with a nitrogen injection.  We leaned on our past experience as well as testing several scenarios to come up with a design that the customer loves.”   Tim Bacon, Lead Project Manager at Baker Furnace.

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