电焊机2018，Vol.48Issue(3)：307-310,4.DOI:10.7512/j.issn.1001-2303.2018.03.61
转向架测梁生产及服役过程中的焊接残余应力研究
Study on the welding residual stress in the side beam of the subway bogie during the production and service processes
张迪 1方孝钟 1董洪达1
作者信息
- 1. 中车南京浦镇车辆有限公司,江苏南京210031
- 折叠
摘要
Abstract
The X ray diffraction method (XRD) was used to test the welding residual stress in the same part of the side beam of the bogie in the processes of production and fatigue test.The change rules of the welding residual stress in the processes of production and service were obtained,which provided theoretical support for improving the manufacturing process of the bogie.The results showed that the surface for incoming side beam existed compressive stress.Residue pressure with non-uniform distribution and high tensile stress was found in the bogie parts after welding and heat repairing.After heat treatment,welding residual stress was greatly reduced,the residual stress tends to be uniform.After sandblasting,the residual stress on the beam surface was changed from tensile stress into favorable compressive stress,which benefited the fatigue property.After frame fatigue test of 6 million cycles,the residual compressive stress relaxation did not occur.After fatigue test of 12 million cycles,the residual compressive stress on the surface significantly decreased,while the stress was relaxed and redistributed to be more uniform.关键词
X射线衍射法/焊接残余应力/热处理/喷砂处理/疲劳试验Key words
X ray diffraction/welding residual stress/heat treatment/sand blasting treatment/fatigue test分类
交通工程引用本文复制引用
张迪,方孝钟,董洪达..转向架测梁生产及服役过程中的焊接残余应力研究[J].电焊机,2018,48(3):307-310,4.
