发明名称 |
Method of making a turbine blade |
摘要 |
A compact steam turbine power-generation plant has a compact steam turbine that operates at a high temperature in a range of 600 to 660° C. Ferrite based heat resisting steels provide for thermal efficiency. The main steam temperature and the reheated steam temperature can be set in a range of 600 to 660° C. by making the main parts exposed to the high temperature atmosphere, such as the rotor shaft, from ferrite based forged steels and cast steels and by making a final stage blade of a low pressure turbine from a martensite steel. The final stage blade is made from a ferrite based forged steel having a tensile strength of 120 kgf/mm2 or more; the rotor shaft is made from a ferrite based forged steel having a 105 h creep rupture strength of 11 kgf/mm2 or more; and the inner casing is made from a ferrite based cast steel having a 105 h creep rupture strength of 10 kgf/mm2 or more.
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申请公布号 |
US6305078(B1) |
申请公布日期 |
2001.10.23 |
申请号 |
US20000605674 |
申请日期 |
2000.06.28 |
申请人 |
HITACHI, LTD. |
发明人 |
SHIGA MASAO;ONODA TAKESHI;NAKAMURA SHIGEYOSHI;FUKUI YUTAKA |
分类号 |
C22C38/44;C22C38/46;F01D5/28;(IPC1-7):B23P15/00 |
主分类号 |
C22C38/44 |
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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