Edward Rolinski

Heat Treating with Nitriding for Forging Die Durability

/ FEATURED NEWS, MANUFACTURING HEAT TREAT, NITRIDING TECHNICAL CONTENT

Source: Advanced Heat Treat Corp.

Edward Rolinski
Senior Scientist
Advanced Heat Treat Corp.

Mike Woods
President
Advanced Heat Treat Corp.

Why do forging dies fail? How can heat treating prevent failure? And what specific role does gas- or plasma-assisted nitriding treatment play in enhancing metal structure?

Heat Treat Today brings you this Best of the Web feature article this Technical Tuesday to answer these questions. Written by Dr. Edward Rolinski and Mike Woods of Advanced Heat Treat Corp., this article explains the impact of forging process, material and press type; heat treatment for forging dies; and nitriding forging and stamping dies.

An excerpt: "Surface properties critical for die performance can be further elevated by a surface-treatment process employing a multi-gradient design strategy, a novel plasma, multi-step treatment with formation of the nanostructured layer/coating developed by Advanced Heat Treat Corp."

Read more: "Enhancing Forging Dies' Durability with Ion Nitriding."

(Image created with images from original AHT Corp. article)

 

 

 

 

 

 

 

 

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Carburizing vs Nitriding Engineering Components

/ CARBURIZING NEWS, FEATURED NEWS, MANUFACTURING HEAT TREAT, MANUFACTURING HEAT TREAT NEWS, NITRIDING TECHNICAL CONTENT

 

Source: Advanced Heat Treat Corp.

 

Extensive wear or fatigue from friction and contact stress cause many engineering components made of ferrous or titanium alloys to fail. In this Best of the Web

Edward Rolinski,”Dr Glow”, Advanced Heat Treat

Technical Tuesday feature, Edward Rolinski, aka Dr. Glow, from Advanced Heat Treat Corp., compares “wear resistance between engineering components that were carburized vs nitrided,” originally published in his article, “Tribological Performance-Enhancing Surface Treatments for Improving Durability of Engineering Components” at AHT’s website.

An excerpt:

“The results of the tribological studies strongly suggest that for many engineering components, the application of nitriding may be more beneficial than carburizing since the nitrided layer had better wear properties than the carburized layer despite the fact that the layer was about four times as thick.”

Rolinski defines the uses, advantages, and tribological behavior of nitrided and carburized steel and provides illustrations of samples subjected to both treatments.

 

Read more: “Tribological Performance-Enhancing Surface Treatments for Improving Durability of Engineering Components”

Main image photo credit/caption: Advanced Heat Treat Corp / Advanced Heat Treat’s Cullman, Alabama, location ion nitroding vessel, which the company says is one of the largest in the United States—”big enough for two small cars to fit inside.”

 

 

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Distortion Engineering of Gears

/ FEATURED NEWS, MANUFACTURING HEAT TREAT, NITRIDING

BOTW-50w  Source:  Gearsolutions.com

THE CAUSES FOR DISTORTION OF GEARS are complex and the heat treatment process has been named as a main contributing factor. However, the truth is, all the manufacturing steps prior to and after heat treating also make a contribution to distortion. Nevertheless, any thermal operations carried out on gears may trigger and reveal the hidden distortion potential induced by manufacturing. An interesting approach of “distortion engineering” was established by the Collaborative Research Center (CRC) at Bremen University.

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Ion Nitriding of Titanium Alloys for Gear Applications

/ AEROSPACE HEAT TREAT, NITRIDING TECHNICAL CONTENT, TITANIUM PROCESSING TECHNICAL CONTENT

BOTW-50w  Source:  Thermal Processing for Gear Solutions
The advantages of ion nitriding heat treatments in many low-alloy steels and titanium alloy gears used in high-performance applications include resisting wear and fatigue.

Thermochemical surface engineer heat treatments are effective in improving the performance of various gears made of ferrous alloys. The cost of machining typical gears during the manufacturing process often exceeds 55 percent of total cost, especially when there is significant grinding after carburizing the gears. Therefore, improvements in the manufacturing of gears that can lead to a reduction in machining are valuable.

Nitriding produces high hardness and compressive stresses in many low-alloy steels used for gears. It is a nearly distortion-free process, which allows for the treating of finished components, thus minimizing costs. The complex nature of the stresses at the contact area of rotating gears leads to contact fatigue and sliding friction. Nitriding is superior to other surface engineering techniques in resisting wear at gear f lanks. When a high-strength alloy steel suitable for nitriding is used, a nitrided surface layer withstands high contact Herztian stress (contact stress) at gear flanks better than a deeper carburized layer in many instances.

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