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《Transactions of the China Welding Institution》 2011-10
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Numerical analysis of ERW welding residual stress field for coiled tubing

LI Jihong1,WANG Wenwu1,2,ZHAO Pengkang1,ZHANG Min1(1.School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China;2.Xi'an Research Institute of China Coal Technology & Engineering Group Corp,Xi'an 710054,China)  
The residual stress distribution of coiled tubing in the process of ERW welding,weld heat treatment and overall heat treatment were simulated initially with the finite element method.The results show that welding residual stress distributing around the weld and the residual stress value is higher in the weld center.It was much lower in other parts of the tube.The maximum residual stress value was 592 MPa.Welding residual stress decreased after the weld heat treatment process and the overall heat treatment process.The maximum residual stress value was 452 MPa after the weld heat treatment process and it was 275 MPa after the overall heat treatment process.This showed that heat treatment processes can effectively reduce welding residual stress.
【Fund】: 陕西省教育厅自然科学基金资助项目(00k904);; 陕西省重点学科建设专项资金资助项目(00X901)
【CateGory Index】: TG404
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