Technology analysis of full penetration butt weld in braking hanging bracket in boige in double-decker train for Sydney

悉尼双客转向架制动吊座对接全熔透焊缝工艺性分析 Technology analysis of full penetration butt weld in braking hanging bracket in boige in double-decker train for Sydney 于传颖 YU Chuanying 1 first-author 梁姝博 LIANG Shubo 1 corresp 553535979@qq.com 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 CRRC Changchun Railway Vehicles Co.,Ltd. CRRC Changchun Railway Vehicles Co.,Ltd. 针对悉尼双客项目转向架制动吊座铸钢G20Mn5与侧梁S355J2W耐候钢两种材质的X型对接全熔透焊缝工艺进行工艺性分析,对焊缝接头进行拉伸、弯曲、冲击和硬度机械性能检测和宏观金相结果分析。通过合理制定焊接工艺,对比分析对称焊接与非对称焊接的焊接工艺性在生产构架上的试验结果,总结出一套满足质量要求、辅助时间短且可操作性强的提质增效的焊接工艺方法,实现了铸钢与耐候钢异种材质的对接全熔透焊接,为转向架生产提供了理论依据与经验。 By studying welding technology of full penet-ration X-shped weld in butt joint between cast steels G20 Mn5 and S355 J2 W for the braking hanging bracket in boige in the double-decker train for Sydney project,the macro metallo-graphy and mechanical properties of welded joint are analyzed,such as tensile, bending, impact and hardness. By formulating a reasonable welding process,comparing and analyzing the exp-erimental results of symmetric and asymmetric welding tech-nologies,a set of welding technology method is summarized,which meets the quality requirment,has short auxiliary time and strong operability,and improves the quality and efficiency. This method relaizes the full penetration butt welding of dissimilar materials of cast steel and weathering resistant steel,and provides basis and experience for bogie production. 转向架 铸钢 对接 焊接工艺 bogie cast steel butt welding welding technology TG44;U270.6 2022-03-08 1 51