| 汽轮机焊接转子接头残余应力研究二:带有弹性槽的30Cr2Ni4MoV模拟件热处理前后残余应力变化 |
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| 引用本文： | 蔡志鹏,屈岳波,潘际銮,刘霞,乔尚飞,沈红卫. 汽轮机焊接转子接头残余应力研究二:带有弹性槽的30Cr2Ni4MoV模拟件热处理前后残余应力变化[J]. 热力透平, 2011, 40(4): 231-234 |
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| 作者姓名： | 蔡志鹏 屈岳波 潘际銮 刘霞 乔尚飞 沈红卫 |
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| 作者单位： | 1. 清华大学机械工程系,北京,100084
2. 上海电气电站设备有限公司上海汽轮机厂工艺处,上海,200240 |
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| 摘 要： | 在测试25Cr2Ni2MoV钢核电转子模拟件外圆、内圆、剖面处热处理前后的残余应力分布的基础上,进一步研究了弹性槽对根部打底焊缝处残余应力的影响,测量了盖面焊缝下方4～5层焊道处残余应力的分布。结果表明,弹性槽对缓解根部应力有显著作用,盖面焊缝下方4～5层焊道处存在超过屈服极限的纵向拉应力;热处理后,残余应力大大降低,且保持较好的应力状态。相关测量工作肯定了实际生产工艺对控制残余应力的有效性。
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| 关 键 词： | 焊接转子 残余应力 弹性槽 热处理 30Cr2Ni4MoV钢 模拟件 |
Residual Stress Research of Joints of Welded Turbine Rotors,Part 2:Residual Stress Variation Before and After Tempering of Models of 30Cr2Ni4MoV Steel Turbine Rotor with Stress-Relief Groove |
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| CAI Zhi-peng,QU Yue-bo,PAN Ji-luan,LIU Xia,QIAO Shang-fei,SHEN Hong-wei. Residual Stress Research of Joints of Welded Turbine Rotors,Part 2:Residual Stress Variation Before and After Tempering of Models of 30Cr2Ni4MoV Steel Turbine Rotor with Stress-Relief Groove[J]. Thermal Turbine, 2011, 40(4): 231-234 |
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| Authors: | CAI Zhi-peng QU Yue-bo PAN Ji-luan LIU Xia QIAO Shang-fei SHEN Hong-wei |
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| Affiliation: | CAI Zhi-peng1,QU Yue-bo1,PAN Ji-luan1,LIU Xia2,QIAO Shang-fei2,SHEN Hong-wei2 (1.Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China,2.Process Department of Shanghai Turbine Plant,Shanghai Electric Power Generation Equipment Co.,Ltd. Shanghai 200240,China) |
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| Abstract: | The effect of stress-relief groove on reducing residual stress of the root weld was studied through a rotor with model steel of 30Cr2Ni4MoV in this paper.The stress below surface of 4~5 lays was also measured.Compared with residual stress of LP nuclear turbine rotor with steel model of 25Cr2Ni2MoV in the first part,the stress-relief groove had dramatic effect on the reducing stress level.The highest stress positions were under the surface of approx.10 mm and the values are beyond yield stress.After temperin... |
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| Keywords: | welded rotor residual stress stress-relief groove tempering 30Cr2Ni4MoV steel rotor models |
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