发明名称 |
Process for case hardened dies in improving die life |
摘要 |
Steel alloys susceptible to case and core hardening comprise 0.05 to 0.24 wt % carbon; 15 to 28 wt % cobalt and 1.5 to 9.5 wt % in nickel, small percentages of one or more additives: chromium, molybdenum, and vanadium; and the balance iron. Carburized roll form and punch dies and tools made from case hardened steel alloys with a reduced hardness core provide high wear and fatigue resistance as well as improved contact and bending fatigue resistance thereby avoiding premature failure and extending the useful life of such tools.
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申请公布号 |
US6695930(B2) |
申请公布日期 |
2004.02.24 |
申请号 |
US20020105975 |
申请日期 |
2002.03.25 |
申请人 |
NORTHWESTERN UNIVERSITY |
发明人 |
KUEHMANN CHARLES J.;OLSON GREGORY B.;WISE JOHN P.;CAMPBELL CARELYN E. |
分类号 |
C21D1/18;C21D6/00;C21D6/04;C21D9/32;C22C38/10;C22C38/44;C22C38/46;C22C38/52;F16H55/06;(IPC1-7):C23C8/22 |
主分类号 |
C21D1/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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