发明授权
- 专利标题： Heat resisting steel and steam turbine rotor shaft and method of making thereof
- 专利标题（中）： 耐热钢和汽轮机转子轴及其制造方法
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申请号： US841676申请日： 1997-04-30
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公开(公告)号： US5911842A公开(公告)日： 1999-06-15
- 发明人: Masao Shiga , Kishio Hidaka , Norio Yamada , Shigeyoshi Nakamura , Yutaka Fukui , Nobuo Shimizu , Ryoichi Kaneko , Yasuhiro Harada , Yasuo Watanabe , Toshio Fujita , Norio Morisada , Yasuhiko Tanaka
- 申请人： Masao Shiga , Kishio Hidaka , Norio Yamada , Shigeyoshi Nakamura , Yutaka Fukui , Nobuo Shimizu , Ryoichi Kaneko , Yasuhiro Harada , Yasuo Watanabe , Toshio Fujita , Norio Morisada , Yasuhiko Tanaka
- 申请人地址： JPX Tokyo JPX Tokyo
- 专利权人： Hitachi, Ltd.,The Japane Steel Works, Ltd.
- 当前专利权人： Hitachi, Ltd.,The Japane Steel Works, Ltd.
- 当前专利权人地址： JPX Tokyo JPX Tokyo
- 优先权： JPX8-112228 19960507
- 主分类号： F01D5/02
- IPC分类号： F01D5/02 ; C21D9/28 ; C21D9/38 ; C22C38/00 ; C22C38/22 ; C22C38/24 ; C22C38/26 ; C22C38/30 ; C22C38/32 ; C22C38/54 ; F01D5/06 ; C21D8/10 ; C21D9/30
摘要：
A heat resisting steel whose metal structure is entirely martensite phase produced by tempering after quenching. The steel comprises, by weight, 0.05 to 0.20% C, not more than 0.15% Si, not more than 1.5% Mn, not more than 1.0% Ni, 8.5 to 13.0% Cr, not more than 3.50% Mo, not more than 3.5% W, 0.05 to 0.30% V, 0.01 to 0.20% Nb, not more than 5.0% Co, 0.001 to 0.020% boron, 0.005 to 0.040% nitrogen, 0.0005 to 0.0050% oxygen and 0.00001 to 0.0002% hydrogen. The steel has preferably not more than 10 of the Cr equivalent. The steel has 10 kgf/mm.sup.2 or more of 100,000 hours creep rupture strength at 650.degree. C.
公开/授权文献
- US4136006A Electrode for electrochemical machining 公开/授权日：1979-01-23