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

(Department of Mechanical Engineering, Tsinghua University, Beijing 100084)

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 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.

Key words: Magnetic treatment  Residual stress  Orthogonal experiment  Range analysis

CLC No: TG441.8

北京市自然科学基金资助项目(3042010). Received 20050602, received in revised form 20051208