低合金表面奥氏体不锈钢堆焊层组织与性能研究  

Study on Microstructure and Properties of Austenitic Stainless Steel Surfacing Layer on Low Alloy Steel

作　　者：王芝玲[1] 于跟喜[2] 

机构地区：[1]江苏省徐州技师学院建筑工程学院焊接教研室,江苏徐州221151 [2]中国矿业大学材料科学与工程学院,江苏徐州221116

出　　处：《铸造技术》2016年第4期771-773,共3页Foundry Technology

基　　金：江苏省大型工程装备检测与控制重点建设实验室开放基金(JSKLEDC201206)

摘　　要：采用熔化极活性气体保护焊,在Q345低合金钢表面堆焊奥氏体不锈钢,其过渡层和耐蚀层材料分别为ER309L和ER347L不锈钢焊丝。对堆焊层进行弯曲和剪切性能测试,并对堆焊层的显微组织及剪切断口形貌进行了观察。结果表明,过渡层设计提高了堆焊层的弯曲和剪切性能,堆焊层组织主要以铁素体和奥氏体为主,还存在微量Cr的碳化物脆性相,剪切断口均显示以韧窝状为主的韧性断裂形貌。The austenitic stainless steel was surfaced on the Q345 low alloy steel by consumable electrode metal active-gas welding （MAG）, where the materials of transition layer and anti-corrosion layer were ER309L and ER347 stainless steel welding wires, respectively. Bending and shearing performance and micro-hardness of the surfacing layer were studied. The microstructure and shear fracture appearance were observed. The results show that the transition layer improves the bending and shearing performance of surfacing layer, and the micro-hardness changes in a same trend. The surfacing layer micro-structure is mainly made up of ferrite and austenite as well as trace Cr in a carbide brittle phase. The shear fractures show ductile dimple fracture appearance.

关 键 词：奥氏体不锈钢 MAG焊 堆焊 显微组织 

分 类 号：TG455[金属学及工艺—焊接]