考虑区域影响的焊接残余应力超声法试验研究  

Experimental Research on Ultrasonic Method of Welding Residual Stress Considering Area Influence

作　　者：李昌敏 冯伟 郭瑞鹏 杨国涛 LI Changmin;FENG Wei;GUO Ruipeng;YANG Guotao(College of Civil Engineering,Qingdao Universi ty of Technology,Qingdao 266033,China;Shandong HI-Speed Engineering Construction Group Co.,Ltd.,Ji'nan 250014,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]山东高速工程建设集团有限公司,山东济南250014

出　　处：《热加工工艺》2023年第13期136-141,147,共7页Hot Working Technology

基　　金：宁波市社会投资建设科研计划项目(202136)。

摘　　要：为提高超声法检测焊接残余应力的准确性,对母材区、热影响区和熔融区的声弹性系数进行标定。基于声弹性系数标定值和零应力基准,修正Q345qD焊接钢板残余应力检测结果,并采用盲孔法对超声法检测结果进行验证。试验结果表明:母材区、热影响区和熔融区的声弹性系数存在较大差异;通过对热影响区域进行声弹性系数及零应力基准修正,可减少该区域的高估应力值;盲孔法和超声法测量结果趋势相同,数值接近,验证了超声法检测焊接残余应力结果的准确性。In order to improve the detection accuracy of welding residual stress by ultrasonic method,the acoustoelastic coefficients of the base metal zone,heat affected zone and melting zone were calibrated.Based on the calibrated value of acoustic elasticity coefficient and zero stress benchmark,the residual stress test results of Q345qD welded steel plate were revised,and the blind hole method was used to verify the ultrasonic test results.The test results show that there are large differences in the acoustic elastic coefficients of the base material zone,heat-affected zone and melting zone;by correcting the acoustic elastic coefficient and zero-stress reference of the heat-affected zone,the overestimation of stress in the area can be reduced.The results of blind hole method and ultrasonic method have the same trend and close values,which verifies the accuracy of the results of welding residual stress detected by ultrasonic method.

关 键 词：焊接残余应力 临界折射纵波 声弹性系数 盲孔法 

分 类 号：TG404[金属学及工艺—焊接] TG115.285