• CN:11-2187/TH
  • ISSN:0577-6686

›› 2006, Vol. 42 ›› Issue (5): 208-213.

• 论文 • 上一篇    下一篇

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磁处理对低碳钢焊接残余应力作用规律的试验研究

林健;黄士卫;蔡志鹏;赵海燕;鹿安理   

  1. 清华大学机械工程系
  • 发布日期:2006-05-15

RESEARCH ON INFLUENCE OF MAGNETIC TREATMENT ON THE DISTRIBUTION OF WELDING RESIDUAL STRESS OF LOW CARBON STEEL

LIN Jian;HUANG Shiwei;CAI Zhipeng;ZHAO Haiyan;LU Anli   

  1. Department of Mechanical Engineering, Tsinghua University
  • Published:2006-05-15

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。

关键词: 残余应力, 磁处理, 极差分析, 正交试验

Abstract: 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 car-ried 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.

Key words: Orthogonal experiment, Magnetic treatment, Range analysis, Residual stress

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