Process for hardening stainless steel and molten salt bath...

Details Process for hardening stainless steel and molten salt bath... Process for hardening stainless steel and molten salt bath...

C - Chemistry, Metallurgy

21

D

C21D 1/06 (2006.01) C21D 1/46 (2006.01)

Patent

CA 2591244

The invention relates to a process for hardening work pieces of stainless steel through diffusion of the elements carbon and/or nitrogen into the work piece surfaces. The work pieces are submerged into a molten salt bath and are subjected to the molten salt bath for a period ranging from 15 minutes to 240 hours at temperatures below 450°C. In addition to potassium chloride and lithium chloride, the molten salt bath contains an activator substance consisting of barium chloride, strontium chloride, magnesium chloride and/or calcium chloride as well as free or complex cyanide as carbon- donating substance.

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