发明申请
- 专利标题： Heat-resisting steel, heat treatment method for heat-resisting steel and high-temperature steam turbine rotor
- 专利标题（中）： 耐热钢，耐热钢和高温汽轮机转子的热处理方法
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申请号： US11218659申请日： 2005-09-06
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公开(公告)号： US20060054254A1公开(公告)日： 2006-03-16
- 发明人: Ryuichi Ishii , Yoichi Tsuda
- 申请人： Ryuichi Ishii , Yoichi Tsuda
- 申请人地址： JP Tokyo 105-8001
- 专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人地址： JP Tokyo 105-8001
- 优先权： JP2004-269947 20040916
- 主分类号： C22C38/46
- IPC分类号： C22C38/46
摘要：
A heat-resisting steel consisting of, in percentage by weight, 0.25 to 0.35 of C, 0.15 or less of Si, 0.2 to 0.8 of Mn, 0.3 to 0.6 of Ni, 1.6 to 1.9 of Cr, 0.26 to 0.35 of V, 0.6 to 0.9 of Mo, 0.9 to 1.4 of W, less than 0.01 of Ti, 0.001 to 0.007 of N, 1.3 to 1.4 of a total of Mo and W/2 and the balance of Fe and inevitable impurities, wherein the heat-resisting steel consists of a bainite single phase structure securing 3.5 or more of a total amount of precipitates as 1.0 or more of Fe, 0.8 to 0.9 of Cr, 0.4 to 0.5 of Mo, 0.3 to 0.5 of W and 0.2 or more of V in percentage by weight are moved into the precipitates after a tempering heat treatment.
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