| 大型发电机转子25Cr2Ni4MoV氩弧焊补焊工艺 |
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| 引用本文： | 李波,蔺福民,全玉强,顾臻,陈金龙,徐峰,吴祖乾.大型发电机转子25Cr2Ni4MoV氩弧焊补焊工艺[J].电机技术,2013(5):42-44,47. |
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| 作者姓名： | 李波 蔺福民 全玉强 顾臻 陈金龙 徐峰 吴祖乾 |
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| 作者单位： | [1]上海电气电站设备有限公司发电机厂,200240 [2]上海市焊接协会,200070 |
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| 摘 要： | 使用脉冲氩弧焊方法对大型发电机转子25Cr2Ni4MoV补焊,通过对4种焊接材料的甄选,确定了与不同深度缺陷匹配的焊材选择方案。研究了脉冲氩弧焊补焊接头的力学性能及金相组织,结果表明焊缝的抗拉强度与冲击功达到与母材基本相近,通过合适的后热处理也可以在一定程度上降低热影响区的淬硬倾向。脉冲氩弧焊补焊接头性能可以满足转子运行工况要求。
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| 关 键 词： | 汽轮发电机 转子 补焊 氩弧焊 |
GTAW Repair-welding Technology on the Large-size Turbine Generator Rotor Made of the 25Cr2Ni4MoV |
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| Affiliation: | LI Bo;LIN Fuming;QUAN Yuqiang;GU Zhen;CHEN Jinlong;XU Feng;WU Zhuqian;Shanghai Electric Power Generation Equipment Co., Ltd., Generator Plant;Shanghai Welding Association; |
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| Abstract: | The pulse-TIG was applied to conduct the repair-welding technology on the large-size turbine generator rotor made of the 25Cr2Ni4MoV. A proper program was selected through comparison one another among 4 kinds of welding materials based upon different defect depth.The strength characteristic and quench organization of the pulse-TIG were studied, coming with the conclusion that the weld joint tensile strength and impact ability approached close to those of the base materials. Quench harding in the heat-affected zone could be reduced into a certain level by the proper after-heating treatment. The characteristic of rotor processed by the repair-welding technology employing pulse-TIG, met with the requirement of the operating condition of the rotor. |
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| Keywords: | turbine-generator rotor repair-welding GTAW |
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