Method for hardening stainless steel and molten salt bath for realizing said process
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United States of America Patent
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Mar 22, 2011
Grant Date -
May 1, 2008
app pub date -
Jun 11, 2007
filing date -
Jun 9, 2006
priority date (Note) -
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Abstract
A process for hardening a work piece of stainless steel through diffusion of the elements carbon and/or nitrogen into the work piece surfaces. The work piece is submerged into a molten salt bath and 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, and a free or complex cyanide as carbon-donating substance.
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