X2CrNiMoN22-5-3双相不锈钢MAG焊接头的组织与性能  

Microstructure and Properties of MAG Welding Bead for X2CrNiMoN22-5-3 Duplex Stainless Steel

作　　者：张强[1,2] 韩建民[1] 梁吉庆 杨智勇[1] 王军强[1] 

机构地区：[1]北京交通大学机械电子与工程学院,北京100044 [2]南车四方车辆有限公司,山东青岛26600

出　　处：《热加工工艺》2014年第1期202-204,共3页Hot Working Technology

摘　　要：采用MAG焊接方法焊接10 mm厚X2CrNiMoN22-5-3双相不锈钢板,焊后分别进行了拉伸、弯曲、硬度、宏观金相和微观金相等试验。结果表明,焊缝金属的力学性能达到母材的强度要求,且焊接接头熔合良好。通过金相观察发现,母材组织为带状奥氏体均匀分布于铁素体基体中,焊缝金属组织为枝晶状奥氏体分布在铁素体基体里,热影响区金相组织为带状奥氏体和枝晶状奥氏体交互分布于铁素体基体。MAG welding method was used to weld 10 mm X2CrNiMoN22-5-3 duplex stainless steel plate, followed by stretching, bending, hardness, macro metallurgical. The results indicate that the weld metal has the same mechanical properties strength with the base material. By optical experiments, ribbon austenitic evenly distribute in the ferrite matrix of base metal organization, while the dendritic austenite distributes in the ferrite matrix of the weld metal and ribbon austenite and the dendritic austenite interaction distributes in the ferrite matrix of heat-affected zone microstructure.

关 键 词：双相不锈钢 熔化极混合气体保护焊 力学性能 微观组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG444.72[金属学及工艺—金属材料]