发明名称 |
High corrosion resistance precipitation hardened martensitic stainless steel |
摘要 |
A precipitation-hardened stainless steel alloy comprises, by weight: about 14.0 to about 16.0 percent chromium; about 6.0 to about 7.0 percent nickel; about 1.25 to about 1.75 percent copper; about 0.5 to about 2.0 percent molybdenum; about 0.025 to about 0.05 percent carbon; niobium in an amount greater than about twenty times to about twenty-five times that of carbon; and the balance iron and incidental impurities. The alloy has an aged microstructure and an ultimate tensile strength of at least about 1100 MPa and a Charpy V-notch toughness of at least about 69 J. The aged microstructure includes martensite and not more than about 10% reverted austenite and is useful for making turbine airfoils.
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申请公布号 |
US7985306(B2) |
申请公布日期 |
2011.07.26 |
申请号 |
US20090365335 |
申请日期 |
2009.02.04 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
CHEN JIANQIANG;MOORS THOMAS MICHAEL;SCHAEFFER JON CONRAD |
分类号 |
C21D6/02;C22C38/42;C22C38/44 |
主分类号 |
C21D6/02 |
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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