Abstract
Abstract A metallurgical study is presented concerning the overcarburizing of chromium steels using the plasma carburizing process. Plasma overcarburizing is a high carbon carburizing process where the carbon content of the case is significantly higher than austenite saturation in order to introduce great quantities of very fine globular carbides in a martensite matrix into the surface layer on alloyed steels with carbide formers. This layer contains a high quantity of complex M 7 C 3 -type carbides on the alloyed steel and is wear and erosion resistant. Applications increasing the life of hot work tools such as forging dies, punches, inserts and glass moulds are envisaged.
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