电焊机2024，Vol.54Issue(4)：50-54,5.DOI:10.7512/j.issn.1001-2303.2024.04.07
转向架牵引拉杆局部电弧增材修复工艺研究
Study on the Locally Repairing Technique Bogie Traction Rods
安博 1姜斌 1毕越宽 1黄金宝 2张乙宙1
作者信息
- 1. 中车唐山机车车辆有限公司,河北 唐山 063035||河北省轨道车辆转向架技术创新中心,河北 唐山 063035
- 2. 中车唐山机车车辆有限公司,河北 唐山 063035
- 折叠
摘要
Abstract
The ER80S-G welding wire was used in this work to weld and repair the quenched and tempered 40Cr steel with-out preheating.The repair of local defects in the traction rod of the bogie was simulated,and the differences between pulse cold arc welding(PCAW)and traditional TIG welding processes were compared and analyzed in terms of repair welding bonding strength,microstructure,hardness distribution,and the degree of influence on the performance of the heat affected zone(HAZ).The results showed that the repaired welding layers of PCAW and TIG joints were well bonded,and no cold cracks were found in the HAZs.The PCAW method with a lower heat input exhibits a faster cooling rate,a narrower HAZ and only 1/6 angular deformation of that TIG welding.Moreover,the PCAW welding joint shows a higher strength and hard-ness attributed to finer grains formed in the welding zone and HAZ,compared to the TIG welding joint.Despite having a lower cladding efficiency,the PCAW welding is more suitable for locally repairing the bogie traction rods due to the higher joining strength,smaller distortion,and minimal impact on the performance of the base material.关键词
转向架/40Cr/局部增材修复/脉冲冷焊/TIG焊Key words
bogie/40 Cr steel/local repair/pulsed cold arc welding/TIG welding分类
矿业与冶金引用本文复制引用
安博,姜斌,毕越宽,黄金宝,张乙宙..转向架牵引拉杆局部电弧增材修复工艺研究[J].电焊机,2024,54(4):50-54,5.
