Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance
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United States of America Patent
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Aug 21, 2018
Grant Date -
Oct 16, 2014
app pub date -
May 31, 2012
filing date -
Jun 2, 2011
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Abstract
A method for producing a case-hardened martensitic stainless steel article includes: providing an article comprised, at least in part, of a martensitic stainless steel, carburizing the article within a temperature range of 1625° F.-1680° F. (885° C.-916° C.), and then carbo-nitriding the article within a temperature range of 1575° F.-1625° F. (857° C.-885° C.). An article, such as a bearing ring, comprising such a case-hardened martensitic stainless steel is also disclosed.
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