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激光冲击强化对不锈钢焊接接头拉伸性能的影响
引用本文:周留成,周磊,李应红,汪诚.激光冲击强化对不锈钢焊接接头拉伸性能的影响[J].焊接学报,2011,32(4):52-54,58.
作者姓名:周留成  周磊  李应红  汪诚
作者单位:空军工程大学航空等离子动力学实验室,西安,710038
摘    要:利用激光冲击强化对12Cr2Ni4A不锈钢焊接接头进行处理,比较了激光冲击一次和二次前后焊接接头拉伸性能、显微硬度和表面残余应力.结果表明,12Cr2Ni4A 焊接试件经过二次激光冲击强化后,显微硬度提高了50%,抗拉强度由818.5 MPa提升至863.8 MPa,并且断裂区域由焊接热影响区转移至基体处,焊接试件的拉...

关 键 词:激光冲击强化  表面处理  焊接接头  拉伸性能
收稿时间:2009/11/23 0:00:00

Effect of laser shock processing on tensile strength of welded joints
ZHOU Liucheng,ZHOU Lei,LI Yinghong and WANG Cheng.Effect of laser shock processing on tensile strength of welded joints[J].Transactions of The China Welding Institution,2011,32(4):52-54,58.
Authors:ZHOU Liucheng  ZHOU Lei  LI Yinghong and WANG Cheng
Affiliation:Air Force Engineering University, Aero-Plasma Dynamic Laboratory, Xi''an 710038, China,Air Force Engineering University, Aero-Plasma Dynamic Laboratory, Xi''an 710038, China,Air Force Engineering University, Aero-Plasma Dynamic Laboratory, Xi''an 710038, China and Air Force Engineering University, Aero-Plasma Dynamic Laboratory, Xi''an 710038, China
Abstract:The welded specimen of 12Cr2Ni4A stainless steel was shocked by pulse laser shock processing(LSP) as a post weld treatment technology once and twice,and the Erichsen test,surface residual stress and hardness of the welding joints of 12Cr2Ni4A stainless steel were compared before and after LSP treated.The results indicate that the microhardness of the joints is improved by 50% after twice laser shock treated,the tension strength is enhanced from 818.5 MPa to 863.8 MPa,and the position of fracture transfers from hear-affected zone to parent material.The LSP treatment can improve the tensile strength of the joints effectively,and the eliminating of residual compressive stress makes great contributions to the improvement in fatigue properties of welding joints.
Keywords:laser shock processing  surface treatment  welding joints  tensile strength
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