Low Torr-Range Vacuum Nitriding of 4140 Steel

Authors: Don Jordan, Harry Antes, Virginia Osterman and Trevor Jones, Solar Atmospheres

Originally Published: Heat Treating Progress, March 2008

Although the nitrided surfaces from atmospheric pressure nitriding and low-torr nitriding are similar, there are some advantages of the low-pressure nitriding including faster turn-around time, a very pure starting atmosphere, the ability to clean the surfaces of the parts using hydrogen prior to the nitriding, and uniform atmosphere.

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