发明名称 |
Ni-Fe based forging superalloy excellent in high-temperature strength and high-temperature ductility, method of manufacturing the same, and steam turbine rotor |
摘要 |
An Ni-Fe based superalloy forging material including 30 to 40 wt % of Fe, 14 to 16 wt % of Cr, 1.2 to 1.7 wt % of Ti, 1.1 to 1.5 wt % of Al, 1.9 to 2.2 wt % of Nb, 0.05 wt % or less of C and the remainder of Ni and inevitable impurities is solution-treated and aged, and thereby gamma' phase (Ni3Al) having an initial mean particle size of about 50 to about 100 nm is precipitated. This superalloy is excellent in high-temperature strength and high-temperature ductility and can produce a large forged product of 10 ton or more. Therefore, this material is suitable for use as the material of a steam turbine rotor having a main steam temperature of 650° C. or more.
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申请公布号 |
US8512488(B2) |
申请公布日期 |
2013.08.20 |
申请号 |
US20070836900 |
申请日期 |
2007.08.10 |
申请人 |
IMANO SHINYA;KAWANAKA HIROTSUGU;DOI HIROYUKI;TAKAHASHI TATSUYA;AZUMA TSUKASA;KAJIKAWA KOJI;HITACHI, LTD.;THE JAPAN STEEL WORKS, LTD. |
发明人 |
IMANO SHINYA;KAWANAKA HIROTSUGU;DOI HIROYUKI;TAKAHASHI TATSUYA;AZUMA TSUKASA;KAJIKAWA KOJI |
分类号 |
C22F1/10;C22C19/05;F01D5/14 |
主分类号 |
C22F1/10 |
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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