电焊机2011，Vol.41Issue(11)：30-34,5.
高速列车用A5083P-O铝合金MIG焊热循环分析及残余应力研究
Research on thermal cycle and residual stress of A5083P-O aluminum alloy MIG welding on high speed train
张洪才 1吉华 2苟国庆 2李达 2陈辉2
作者信息
- 1. 铁道部驻青岛机车车辆验收室,山东 青岛 266000
- 2. 西南交通大学焊接研究所,四川 成都 610031
- 折叠
摘要
Abstract
Thermal cycle parameters of A5083P-O aluminum alloy MIG welding are measured by means of thermal cycle equipment, and temperature field and residual stress are studied by numerical simulation.Measuring results show that in the center of weld bead, thermal cycle curves are "sharp" and thermal cycle curves will change "passivation" from "sharp" when the distance increase from the center of weld bead.The rate of heating,the peak value of temperature and the residence time of high temperature show linear relation with time,while the change tends of cooling rate are not obvious.Measuring results show welding temperature field present steady state when the welding length is about 75 mm.Non-uniform temperature field during welding is the main formation reason of residual stress.The measuring results of hole-drilling method and X-ray diffraction method are coordinate with results of simulation.关键词
高速列车/5083铝合金/热循环/残余应力/数值模拟Key words
high speed train/A5083P-O aluminum alloy/thermal cycle/residual stress/numerical simulation分类
矿业与冶金引用本文复制引用
张洪才,吉华,苟国庆,李达,陈辉..高速列车用A5083P-O铝合金MIG焊热循环分析及残余应力研究[J].电焊机,2011,41(11):30-34,5.
