发明名称 |
GEAR MATERIAL FOR AN ENHANCED ROTORCRAFT DRIVE SYSTEM |
摘要 |
<p>A surface processing method includes the step of increasing a surface hardness of a metal having a nominal composition that includes about 0.21-0.25 wt % carbon, about 2.9-3.3 wt % chromium, about 11-12 wt % nickel, about 13-14 wt % cobalt, about 1.1-1.3 wt % molybdenum, and a balance of iron from a first hardness to a second hardness. For example, the method is used to produce a surface-hardened component that includes a core section having a first hardness between about 51 HRC and 55 HRC and a case section having a second hardness that is greater than the first hardness.</p> |
申请公布号 |
EP2118326(A2) |
申请公布日期 |
2009.11.18 |
申请号 |
EP20070873635 |
申请日期 |
2007.11.28 |
申请人 |
SIKORSKY AIRCRAFT CORPORATION |
发明人 |
TAPAS, MUKHERJI;DANDORPH, MICHAEL E.;HANSEN, BRUCE D.;KAREDES, EDWARD J. |
分类号 |
C21D9/32;C23C8/22;C23C8/26;C23C8/34 |
主分类号 |
C21D9/32 |
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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