双熔敷极奥氏体不锈钢焊条电弧焊接头组织与性能研究  

Study on microstructure and properties of arc welding joint with double deposited electrode Austenitic stainless steel electrode

作　　者：马琦 赵伟[1,2] 苏国强 张辉 MA Qi;ZHAO Wei;SU Guo-qiang;ZHANG Hui(School of Mechanical and Automotive Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China;Shandong Institute of Mechanical Design and Research,Jinan 250031,China)

机构地区：[1]齐鲁工业大学(山东省科学院)机械与汽车工程学院,山东济南250353 [2]山东省机械设计研究院,山东济南250031

出　　处：《齐鲁工业大学学报》2022年第6期34-37,共4页Journal of Qilu University of Technology

基　　金：国家自然科学基金(51805285);中国博士后基金面上项目(2019M661016);山东省重点研发计划(2018GGX103031)。

摘　　要：采用双熔敷极奥氏体不锈钢焊条电弧焊工艺对316 L不锈钢进行了焊接,焊接电流分别采用120、150、180和210 A。结果表明,当焊接电流为120 A时,母材和焊缝结合较差,当焊接电流为150、180和210 A时,母材和焊缝结合较好。焊缝组织为晶界明显的等轴晶,电流为120 A时晶粒最细,随着焊接电流逐渐增大,其晶粒尺寸逐渐增大。熔合区清晰可见。热影响区组织为等轴奥氏体晶粒。焊接接头的显微硬度随着焊接电流的增大缓慢提高。316 L stainless steel was welded by double deposited austenitic stainless steel electrode arc welding process.The welding currents were 120,150,180 and 210 A respectively.The results show that when the welding current is 120 A,the bonding between base metal and weld is poor,and when the welding current is 150,180 and 210 A,the bonding between base metal and weld is better.The weld microstructure is equiaxed grain with obvious grain boundary.The grain size is the smallest when the current is 120 A.With the gradual increase of welding current,the grain size increases gradually.The fusion zone is clearly visible.The microstructure of heat affected zone is equiaxed Austenite grain.The microhardness of welded joints increases slowly with the increase of welding current.

关 键 词：双熔敷极焊条电弧焊 316 L不锈钢 显微组织 力学性能 

分 类 号：TG444.1[金属学及工艺—焊接]