发明名称 |
Turbine system having more failure resistant rotors and repair welding of low alloy ferrous turbine components by controlled weld build-up |
摘要 |
System for repairing worn surfaces of steam turbine components and especially high pressure turbine rotors, are disclosed. These systems include depositing a first layer of weld metal on a worn surface of the component, whereby a heat-affected zone is created. A second layer of weld metal is then deposited over the first layer using a greater amount of heat to temper at least a portion of the heat-affected zone produced by the first layer. The preferred embodiments include the use of gas tungsten arc welding for providing fine-grain size and more creep resistance, especially in the weld and heat-affected zone. The resulting build-up can be machined, for example into a blade fastening to produce a component having properties equal to or better than the base-metal alloy. The invention also provides a longer lasting turbine system, including rotors which have serrated steeples that are more resistant to failure.
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申请公布号 |
USRE37562(E1) |
申请公布日期 |
2002.02.26 |
申请号 |
US19980013470 |
申请日期 |
1998.01.26 |
申请人 |
SIEMENS WESTINGHOUSE POWER CORPORATION |
发明人 |
CLARK ROBERT E.;AMOS DENNIS R. |
分类号 |
F01D5/30;B23K9/04;B23K9/23;B23K15/00;B23K26/34;F01D5/00;F01D25/00;(IPC1-7):F04D29/02 |
主分类号 |
F01D5/30 |
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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