Ion Nitriding

Ion nitriding , or plasma nitriding, is currently the most technologically advanced method for case hardening of steel components. Case depths of up to 0.030-inch are formed in order to provide increased wear, fatigue and corrosion resistance properties.

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Process

The process is conducted in a vacuum chamber back-filled to a very low pressure with a mixture of nitrogen and other gases. A high voltage electrical charge forms plasma from the gas mixture. Nitrogen ions then accelerate through the plasma and impinge on the workpiece. The ion-bombardment process heats the workpiece, cleans its surface, and results in absorption of active nitrogen into the surface of the material producing a “hardened case”.