压力容器2016，Vol.33Issue(11)：59-63,5.DOI:10.3969/j.issn.1001-4837.2016.011.010
静拉伸过程中焊接残余应力与裂纹磁记忆信号特征对比
Character Comparison of Magnetic Memory Signals of Residual Stress and Crack during Tensile Process
吕香慧 1楼淼 1廖旭东 1卢飞 1李波 1李莎莎1
作者信息
- 1. 西北核技术研究所,陕西 西安 710024
- 折叠
摘要
Abstract
This paper has got the magnetic memory testing signals ( the normal component and the grads of the magnetic field) and analyzed the diversification character of the magnetic memory testing signals of the welded line when it has or don′t has cracks through the tensile loading aimed at the steel jointing workpiece of Q345R. The experimentation result has shown that this method can′t estimate the existing of the crack in the welded line because of the residual stress before the tensile loading. And the two kinds jointing workpieces have shown obviously elimination process of residual stress through the tensile load-ing. When there is a load the jointing workpiece with crack presents itself partial change during the elas-ticity phase and the whole yield phase,and the grads of the magnetic field around the welded line of the jointing workpiece without crack diminishes stage by stage during the elasticity phase. Only when it turns into the yield phase it has the same character diversification as the jointing workpiece with crack.关键词
磁记忆/拉伸过程/焊缝/裂纹/残余应力Key words
magnetic memory/tensile condition/welded line/crack/residual stress分类
机械制造引用本文复制引用
吕香慧,楼淼,廖旭东,卢飞,李波,李莎莎..静拉伸过程中焊接残余应力与裂纹磁记忆信号特征对比[J].压力容器,2016,33(11):59-63,5.
