- 专利标题： Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance
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申请号： US16039564申请日： 2018-07-19
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公开(公告)号： US11667999B2公开(公告)日： 2023-06-06
- 发明人: Hitesh K. Trivedi , Frederick J. Otto , Timothy W. Piazza , Bryan A. McCoy , Rabi S. Bhattacharya
- 申请人： UES INC. , MIDWEST THERMAL-VAC INC , AKTIEBOLAGET SKF
- 申请人地址： US OH Dayton
- 专利权人： UES INC.,MIDWEST THERMAL-VAC INC.,AKTIEBOLAGET SKF
- 当前专利权人： UES INC.,MIDWEST THERMAL-VAC INC.,AKTIEBOLAGET SKF
- 当前专利权人地址： US OH Dayton; US WI Kenosha; SE Gothenburg
- 代理机构： J-Tek Law PLLC
- 代理商 Jeffrey D. Tekanic; Scott T. Wakeman
- 主分类号： C23C8/32
- IPC分类号： C23C8/32 ; C22C38/02 ; C22C38/04 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/52 ; F16C33/62 ; F16C33/64 ; C23C8/58 ; C21D6/00 ; C21D9/40 ; C21D1/06 ; C21D1/25 ; C22C5/04 ; C22C19/03
摘要：
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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