电焊机2018，Vol.48Issue(3)：271-274,289,5.DOI:10.7512/j.issn.1001-2303.2018.03.53
基于临界折射纵波法Q345C焊接接头残余应力检测
Detection of residual stress of Q345C welded joints based on the longitudinal critical refraction wave method
吴发杰 1张志毅 1邱培现 1朱忠尹2
作者信息
- 1. 中车青岛四方机车车辆股份有限公司,山东青岛266111
- 2. 西南交通大学材料科学与工程学院,四川成都610031
- 折叠
摘要
Abstract
Based on the theory of acoustic elasticity,the residual stress of butt joint of 12 mm thick Q345C steel was measured by critical refraction longitudinal wave method.During the test,a 2.5 MHz frequency probe was used to get the residual stress distribution in different regions of butt joint.The ultrasonic propagation velocity will be affected in the process of spreading by the size,morphology and microstructure of the material,based on different regions of welded joints were calibrated by the stress coefficient K value of each area,improve the residual stress of the joint test precision welding of Q345C steel.By modifying the influence of the microstructure difference on the ultrasonic velocity,the engineering application of the critical refraction longitudinal wave method to test the residual stress is promoted.关键词
临界折射纵波/残余应力/Q345C钢/声弹性Key words
longitudinal critical refraction wave/residual stress/Q345C steel/acoustic elasticity分类
矿业与冶金引用本文复制引用
吴发杰,张志毅,邱培现,朱忠尹..基于临界折射纵波法Q345C焊接接头残余应力检测[J].电焊机,2018,48(3):271-274,289,5.
