CARBURIZING NEWS

Heat Treat Basics: Nitriding and Carburizing

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Pattern Energy, Siemens Determine Cause Of Ocotillo Wind Collapse, Energy Heat Treating  Source:  Metlab

Nitriding and carburizing are the two most common heat treatment practices for surface hardening functional components. The main difference is that in nitriding, nitrogen atoms are made to diffuse into the surface of the parts being processed, whereas in carburizing, carbon is used. There are advantages and disadvantages to both processes.

This excellent blog post by Metlab in the Philadelphia area is a great primer for both processes.

Read More:  Nitriding and Carburizing

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Heat Treat Basics: Metal Urgency – Carburizing

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BOTW-50w  Source:  Thermal Processing Magazine

“While some heat treatments are used to soften the material or improve its machinability, most are processed to obtain strengthened or hardened properties. The majority of heat treatments apply to metallic materials and, typically, the techniques include annealing, normalizing, quenching, tempering, precipitation strengthening, surface hardening, and case hardening. Heat treatment is so critically important that we can safely say a part undergoing extensive manufacturing processes such as melting, rolling, forging, and other related machining is of little or no value without the necessary and appropriate heat treatment.”

Read More:  Metal Urgency –  Carburizing by March Li, Metallurgist

March Li Metallurgist, Manufacturing Heat Treating, Thermal Processing Magazine, CarburizingMarch Li – Metallurgist

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Practical Approach to Determining Effective Case Depth of Gas Carburizing

/ AUTOMOTIVE HEAT TREAT, AUTOMOTIVE HEAT TREAT NEWS, CARBURIZING NEWS, FEATURED NEWS

BOTW-50w  Source:  Gear Technology

“Effective case depth is an important factor and goal in gas carburizing, involving complicated procedures in the furnace and requiring precise control of many thermal parameters. Based upon diffusion theory and years of carburizing experience, this paper calculates the effective case depth governed by carburizing temperature, time, carbon content of steel, and carbon potential of atmosphere. In light of this analysis, carburizing factors at various temperatures and carbon potentials for steels with different carbon content were calculated to determine the necessary carburizing cycle time. This methodology provides simple (without computer simulation) and practical guidance of optimized gas carburizing and has been applied to plant production. It shows that measured, effective case depth of gear parts covering most of the industrial application range (0.020 inch to over 0.250 inch) was in good agreement with the calculation.”

Read More:  Practical Approach to Determining Effective Case Depth of Gas Carburizing by March Li

March Li Metallurgist, Automotive Heat Treating, Practical Approach to Determining Effective Case Depth of Gas CarburizingAuthor March Li -Metallurgist

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Analysis of Heat Treat on Carburized Ring Gear and Multivariate Regression Model Development

/ CARBURIZING NEWS, FEATURED NEWS, HARDENING NEWS, MANUFACTURING HEAT TREAT, MANUFACTURING HEAT TREAT NEWS

BOTW-50w  Source:  Thermal Processing for Gear Solutions

Like most other heat treatments, the carburizing and hardening process is known to introduce dimensional changes and gear distortion [4]. If these size and shape changes can be anticipated and controlled, it is possible to eliminate post–heat treatment machining by designing ring gears that would allow for the heat treat change. Such gear manufacturing would significantly reduce cost and machining-to-assembly time, both of which are critical in a commercial environment and large-scale production.

Read More:  Analysis of Heat Treat Growth on Carburized Ring Gear and Multivariate Regression Model Development

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