75kg/m U78CrV热轧钢轨与热处理钢轨气压焊质量研究  

Research on Gas Pressure Welding Quality of 75kg/m U78CrV Welded Joints of Hot-rolled Rail and Quenched Rail

作　　者：钟元[1] 戴虹[1] 周世恒[1] 李正浩[1] 

机构地区：[1]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《热加工工艺》2017年第15期190-193,198,共5页Hot Working Technology

摘　　要：在大秦、朔黄等重载铁路上,由于不同区段线路换铺维修时的耐磨性要求,采用的75kg/m U78CrV钢轨有热轧、热处理两种类型。针对热轧态与热处理态钢轨混合焊接的难度大,采用GPW-1200(75)气压焊轨机按照75kg/m U78CrV轨成套焊轨工艺开展了焊接和正火试验。经各项性能检测结果表明,在该工艺参数下热轧钢轨和热处理钢轨混合焊接接头满足TB/T1632《钢轨焊接》标准要求。75 kg/m U78CrV hot-rolled rail and quenched rail were used on Daqing and Shuohuang heavy-duty lines because of wear resistance requirement in different sections of line maintenance. For welding difficulty between hot-rolled rail and queched rail, the GPW-1200 （75） rail gas pressure welding machine was used, and the welding and normalizing test were carried out according to the complete rail welding technology of 75 kg/m U78CrV rail. The performance tests results show that under the process parameters, the hybrid welded joint of hot-rolled rail and quenched rail meets the standard requirements of TB/T 1632.

关 键 词：75kg/m钢轨 U78CrV 气压焊 

分 类 号：TG453.2[金属学及工艺—焊接]