不锈钢CMT焊接与MAG焊接工艺对比研究  

Comparative study on CMT welding and MAG welding process of stainless steel

作　　者：夏宁 黄坤 刘晨 李龙飞 王春明[2] XIA Ning;HUANG Kun;LIU Chen;LI Longfei;WANG Chunming(CRRC Nanjing Puzhen Co.,Ltd.,Nanjing 210031,Jiangsu,China;Huazhong University of Science and Technology,Wuhan 430000,Hubei,China)

机构地区：[1]中车南京浦镇车辆有限公司,江苏南京210031 [2]华中科技大学,湖北武汉430000

出　　处：《金属加工（热加工）》2024年第10期39-42,共4页MW Metal Forming

摘　　要：选用2mm厚X2CrNiN18-7不锈钢进行CMT与MAG焊接工艺对比试验研究。主要从焊缝成形、接头金相、力学性能、焊接飞溅和焊接变形等方面对比分析以上两种工艺的不同之处。结果表明:两种焊接方法的焊缝都是典型的熔化极气体保护焊焊缝成形,二者主要的组织成分都以奥氏体为主,且有少量铁素体。由于MAG焊接热输入高,特征区域与CMT焊接相比缺少部分熔化区和等轴晶区。CMT焊接所得焊缝强度和伸长率高于MAG焊接,焊接飞溅仅为MAG焊接的20%左右,且同种外部条件下同类接头优化工艺CMT焊接变形比MAG焊接小,最大焊接变形约为MAG焊接的70%。2mm thick X2CrNiN18-7 stainless steel is used to carry out a comparative experimental study of CMT welding and MAG welding process.Mainly from the weld shaping,joint metallurgy,mechanical properties,welding spatter and welding deformation,etc.Comparative analysis of stainless steel CMT welding process and MAG welding process differences.The results show that the weld of the two welding methods are typical melting electrode gas shielded weld seam forming,and the two main organizational components are austenite-based,and a small amount of ferrite.Due to the high heat input of MAG welding,its characteristic area than the CMT welding lack of part of the melting zone and isometric crystal area,CMT welding weld strength and elongation is higher than the MAG welding,welding spatter is only about 20%of the MAG welding,and the same kind of external conditions under the same type of joint optimization process CMT welding deformation is smaller than the MAG welding,the maximum weld deformation of about 70%of the MAG welding.

关 键 词：CMT焊接 MAG焊接 焊缝对比 性能 

分 类 号：TG457.11[金属学及工艺—焊接]