Case hardening is a surface hardening process which involves hardening the thin surface layer on steel while the inner core remains quite soft. Case hardening process actually involves two important heat treatment phases or steps.

1. Carburizing

2. Hardening

In carburizing, this process involves parking the component to be case hardening a carbon rich materials (container). The container placed in a finance and heated to the desired temperature. The component then removed and quench in clear water immediately.

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