低碳钢电弧堆焊工艺对焊缝力学性能的影响  

Effect of Arc Surfacing Process on Mechanical Properties of Low Carbon Steel weld

作　　者：王海林 雷达 顾珍珍 彭道衡 王金凤 WANG Hai-lin;LEI Da;GU Zhen-zhen;PENG Dao-heng;WANG Jin-feng(School of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院材料科学与工程学院,湖北十堰442002

出　　处：《材料保护》2020年第12期84-87,115,共5页Materials Protection

摘　　要：目前对采用二氧化碳气体保护堆焊法在Q235低碳钢表面进行堆焊并进行性能研究的报道不多。采用二氧化碳气体保护药芯焊丝电弧堆焊方法,研究了焊接工艺对低碳钢Q345堆焊后复合板材的组织和性能的影响,并获得了力学性能优异的堆焊层。试验结果表明:当焊接电流为200~240 A,焊接电压为26~30 V,堆焊速度稳定在300 mm/min时,可获得焊缝成形和脱渣性良好的堆焊层。基体层硬度值保持在175 HV以上,堆焊层的硬度值保持在520 HV以上,复合板材冲击韧性保持在45 J以上。Less studies were researched on the performance of surfacing of Q235 low carbon steel with carbon olioxide gas shielded surfacing sheet.The effects of welding process on the microstructure and properties of Q345 low carbon steel clad plate with carbon dioxide gas-shielded flux cored wire were studied,and a weld overlay with excellent mechanical properties was obtained.Results showed that the welding layer with good weld forming and slag removal was obtained when the welding current was 200~240 A,the welding voltage was 26~30 V,and the surfacing speed was 300 mm/min.The hardness of the base layer maintained above 175 HV,and the hardness of the surfacing layer maintained above 520 HV.Besides,the impact toughness of the composite sheet maintained above 45 J.

关 键 词：Q345钢 电弧堆焊 二氧化碳气体保护 工艺参数 力学性能 

分 类 号：TG156.91[金属学及工艺—热处理]