T4003热轧不锈钢带MIG焊接头性能分析  

Property Analysis of MIG Welding Joint of T4003 Hot Rolled Stainless Steel Strip

作　　者：杨密 Yang Mi(Cold Rolling Plant,TISCO Stainless Steel Co.,Ltd.,Taiyuan Shanxi 030003,China)

机构地区：[1]太钢不锈钢股份有限公司冷轧厂,山西太原030003

出　　处：《山西冶金》2024年第3期29-31,34,共4页Shanxi Metallurgy

摘　　要：T4003热轧不锈钢带为实现在酸洗线连续生产,前后钢带需通过MIG焊进行焊接。通过对某钢厂T4003热轧钢带的MIG焊接头进行力学性能测试及微观组织分析,得出T4003焊接接头的焊缝区显微组织由铁素体和奥氏体组成。根据热影响区的组织形态可分为HAZ1、HAZ2和HAZ3三个区域,其中HAZ1由马氏体和铁素体组成;HAZ2由铁素体和块状马氏体组成;HAZ3与HAZ2组织形态相似,但是该区域与其他热影响区相比,马氏体含量较少。热影响区有马氏体组织生成,出现了明显硬化现象,焊接接头在拉伸过程中全部断裂在母材位置,面弯和背弯试验结果未出现断裂现象。T4003 Hot rolled stainless steel strip in order to achieve continuous production in the pickling line,the front and rear steel strips need to be welded by MIG welding.Based on the mechanical properties testing and microstructure analysis of the MIG welded joint of the T4003 hot-rolled steel strip in a steel plant,it is concluded that the microstructure of the weld zone of the T4003 welded joint is composed of ferrite and austenite,and can be divided into HAZ1,HAZ2 and HAZ3 zones according to the microstructure of the heat-affected zone:HAZ1 is composed of martensite and ferrite,HAZ2 is composed of ferrite and massive martensite,HAZ3 and HAZ2 are similar in morphology,but the martensite content in this region is less than that in other heat affected zones.Martensitic structure was formed in the heat affected zone,and obvious hardening occurred.All welded joints broke at the base metal position during the tensile process.No fracture was found in the results of face bending and back bending tests.

关 键 词：T4003 不锈钢 MIG 焊接 力学性能 金相组织 

分 类 号：TG335.11[金属学及工艺—金属压力加工]