焊后热处理对S30408/Q345R复合板焊接接头残余应力的影响  

Influence of post-weld heat treatment on residual stress of welded joint of S30408/Q345R clad plate

作　　者：刘文明 欧阳凯 张新明 张朝明 程新路 陈成[2] LIU Wen-ming;OUYANG Kai;ZHANG Xin-ming;ZHANG Chao-ming;CHENG Xin-lu;CHEN Cheng(China Construction Industrial&Energy Engineering Group Co Ltd,Nanjing 210023,China;School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]中建安装集团有限公司,江苏南京210023 [2]南京工业大学机械与动力工程学院,江苏南京211816

出　　处：《材料热处理学报》2023年第3期217-226,共10页Transactions of Materials and Heat Treatment

基　　金：中建安装集团有限公司科技研发计划课题(AZ-2021-11)。

摘　　要：采用计算机模拟、X射线衍射法和盲孔法对焊后热处理前后的S30408/Q345R复合板焊接接头的残余应力分布进行了研究。数值模拟结果表明:随着焊接道次的增加,焊缝区的残余应力逐渐减小并趋于稳定,熔合线附近的残余应力逐渐增大,且高于其他位置的残余应力。结果表明:采用580℃保温2 h的热处理工艺,消除残余应力的作用有限。X射线衍射法及盲孔法所获得的焊缝残余应力值最大误差为23%;焊接接头残余应力实测值明显高于模拟值,焊缝及熔合线附近位置误差均较大,最大误差可达33%。The residual stress distribution of welded joint of S30408/Q345R clad plate before and after post-weld heat treatment(PWHT)was studied by computer simulation,X-ray diffraction method and hole drilling strain-gauge.The numerical simulation results show that with the increase of welding passes,the residual stress in the weld gradually decreases and tends to be stable,and the residual stress near the fusion line gradually increases,and is higher than that in other positions.The test results show that the heat treatment process of holding at 580℃for 2 h has limited effect on eliminating residual stress.The maximum error of weld residual stress obtained by X-ray diffraction method and hole drilling strain-gauge is 23%.The measured value of residual stress of the welded joint is obviously higher than the simulated value,and the error of the weld and the location near the fusion line is large,with the maximum value of 33%.

关 键 词：焊后热处理 残余应力 数值模拟 X射线衍射法 

分 类 号：TG404[金属学及工艺—焊接] TG441.8