摘要
采用正交试验设计的方法系统研究了磁处理对低碳钢焊接试样中残余应力分布的影响,应力测量选用小孔法在20钢焊接试样上进行,比较残余应力在处理前后的变化。试验中考虑三个因素,即磁场方向、磁场强度和处理时间对处理效果的影响。对残余应力的测量结果采用概率统计的方法进行检验,排除了试验误差的干扰,并从中抽取特征量进行正交试验的极差分析。试验和分析结果表明,磁场方向和处理时间是影响磁处理效果的关键因素,并可从中分析得到改变试样中应力分布的最佳处理条件。
The study is carried out on the influence of magnetic treatment on the distribution of welding residual stress by orthogonal experimental design method. In the experiments three influence factors, magnetic field intensity, field direction, and the process time, are considered. The residual stress is measured by hole drilling method. In order to reduce the influence of experimental error, the result data are analyzed by statistic method, and a range analysis of orthogonal experiment is carried out. It shows that the magnetic field direction and process time are the key factors to influence the residual stress, and the optimum parameters of magnetic treatment can be obtained.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第5期208-213,共6页
Journal of Mechanical Engineering
基金
北京市自然科学基金资助项目(3042010)。
关键词
磁处理
残余应力
正交试验
极差分析
Magnetic treatment, Residual stress,Orthogonal experiment, Range analysis
