摘要
由试验证明，无论是定拘束单向拉伸试样，还是焊接试样，经适当的高强脉冲磁处理后，残余应力水平明显下降。在大刚度拘束焊接件试样上的结果表明，距焊缝40mm附近处的纵向残余应力与横向残余应力下降（100～150）MPa，下降率在40％以上，纵横向残余应力分布曲线呈一定程度的整体下移，采用若干次强脉冲磁处理的效果更好。
Pulsed magnetic treatment is a en-tirely new non-heating method to reduce residualstresses. The tests show that proper strongpulsed magnetic treatment can lead to stress re-laxation in both rigid restrained tensile specimenand welded specimen. For rigid restrained weldedspecimen,the results show that the longitudinaland transverse residual stresses are reduced -byloo^l5oMPa at the areas for from 4Omm to theweld bead, the rate of reduction are more than4o%. Moreover the longitudinal and the trans-verse residual stress distribution indicates a fea-ture of wholly reduction. In addition,the numberof time of magnetic treatment has influence onthe effects.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
1998年第4期40-42,共3页
China Mechanical Engineering
基金
国家自然科学基金!59375225
关键词
残余应力
磁处理
焊接
应力松弛
residual stresses
welding magnetic treatment
stress reduction
