1Cr17与1Cr18Ni9Ti异种钢搭接焊接接头的显微组织分析  

Analysis on Microstructure of Lap Welded Joints for 1Crl7 and lCrl8Ni9Ti Dissimilar Stainless Steel

作　　者：聂斌英[1] 姚成武[2] 

机构地区：[1]宜春学院化学与生物工程学院,江西宜春338000 [2]上海交通大学上海市激光制造与材料改性重点实验室,上海200240

出　　处：《热加工工艺》2014年第23期222-224,共3页Hot Working Technology

摘　　要：本文进行1Cr17和l Cr18Ni9Ti异种不锈钢搭接氩弧焊接,采用钨极焊炬偏向lCr18Ni9Ti奥氏体不锈钢侧的焊接工艺,以减少铁素体不锈钢1Cr17的熔化量和降低其热影响区铁素体晶粒粗化,采用光学显微镜、扫描电镜和室温拉伸对其焊接接头的显微組织和性能进行了研究。结果表明,搭接焊缝金属主要为细小的条块状奥氏体组织及少量的块状铁素体。1Cr17钢侧热影响区铁素体晶粒粗化得到抑制,试样拉伸断口位于搭接区的奥氏体焊缝金属而不是铁素体不锈钢的热影响区。The lap joint of the stainless steels of ferritic 1Cr17 and austenitic 1Crl8Ni9Ti were welded by using gas tungsten arc welding （TIG）. The welding procedure with welding torch deviating to austenitic stainless steel 1Crl8Ni9Tiwas adopted in order to control the melting amount and reduce the grain coarsening in welding heat affected zone of ferritic stainless steel 1Cr17. The weld zone of 1Cr17 and 1Crl 8Ni9Ti dissimilar stainless steel was studied by using OM, SEM and room-temperature tensile test. The results show that the chemical composition of the lap weld is mainly fine stripy austenite and a little massive ferrite. The grain coarsening of the welding heat-affected zone on the side of ferrite stainless steel 1Cr17 is inhibited, while the specimens all fracture in the lap weld seam instead of the heat-affected zone of ferrite stainless steel.

关 键 词：铁素体不锈钢 奥氏体不锈钢 搭接焊接 显微组织 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG441.2[金属学及工艺—金属材料]