- VACUUM CARBURIZING -

Vacuum carburizing is a state-of-the-art thermal process where carburizing is effected under very low pressures. First the parts are heated in vacuum to above the transformation temperature of the alloy. Then they are exposed to carbon-carrying gas, or gas mixtures, under partial pressure. Nitrex has developed a revolutionary process called “Pulse- Pressure”, a method quickly becoming the industry standard.

Relative to conventional carburizing, the main advantages of the method are:

• repeatable results to within ±0.001″ (±25µm),
• significantly reduced size changes and distortion,
• improved fatigue strength,
• better control of the surface layer chemistry,
• the process is environmentally friendly

The basic aspects or carburizing in general are described in the Conventional Carburizing section.

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