J型坡口焊缝MAG焊工艺性研究

J型坡口焊缝MAG焊工艺性研究 Study on MAG welding technology of J-shaped groove weld 梁姝博 LIANG Shubo 1 first-author 董明 DONG Ming 1 中车长春轨道客车股份有限公司 中车长春轨道客车股份有限公司 Changchun Railway Vehicles Co.,Ltd. Changchun Railway Vehicles Co.,Ltd. J型坡口是轨道客车转向架焊缝常用坡口形式之一,Q345钢为转向架用主要材料。针对Q345钢的J型坡口焊缝分别进行手工、自动、复合三种方法的MAG焊工艺性研究。通过对接头的宏观金相、硬度检测的试验结果进行对比发现,复合MAG焊生产效率高于手工MAG焊,焊缝质量优于自动MAG焊,是能较好满足企业批量安全生产基本要求的工艺方法。 J-shaped groove is one of the commonly used groove forms in the weld of railway vehicle bogies. Q345 steel is one of the materials used in the railway vehicle bogies. For the J-shaped groove weld of Q345 steel,the technological research on the three methods of manual,automatic and hybrid MAG welding is studied. By comparing the test results of the macroscopic metallurgy and hardness of the welded joints,it shows that the hybrid MAG welding is more efficient than the manual MAG welding,and the weld quality of hybrid MAG welding is better than that of automatic MAG welding. So hybrid MAG welding is the most suitable procedure for meeting the basic requirements of batch safety production. 转向架 J型坡口 复合MAG焊 工艺性研究 bogie J-shaped groove hybrid MAG welding technological research TG444.72;U270.6 2022-03-08 3 50