激光焊典型对接接头焊接性能研究  

Research on the welding properties of typical butt joints with laser-welding

作　　者：高瑞全[1] 韩晓辉[1] 何智勇[1] 赵延强[1] 

机构地区：[1]南车青岛四方机车车辆股份有限公司,山东青岛266000

出　　处：《电焊机》2013年第3期65-69,共5页Electric Welding Machine

摘　　要：通过研究奥氏体不锈钢材料2-SUS301L-ST对接接头的外观形貌、力学性能、显微硬度、金相组织等,考察激光焊接典型对接接头焊接性能。试验研究表明:激光焊接间隙小于等于0.2 mm时,激光焊接过程稳定,焊缝成形均匀美观,未发现外观缺陷和内部缺欠;激光焊接接头具有较好的塑韧性,其平均拉伸强度为786 MPa,激光焊对接接头显微硬度约250 HV;激光焊缝的微观组织均为柱状晶奥氏体组织,热影响区显微组织致密、晶粒细小。The welding properties of typical butt joints with laser welding were investigated,by researching on coating appearance, mechanical properties, micro-hardness,metallographic structure of butt joints with austenitic stainless steel （2-SUS301L-ST）.The experiment results showed that,the laser welding process steadied,appearances of weld were uniformity and artistic and any external or internal defects were not fnund,when the welding clearance was not more than 0.2 mm;the plasticity and the toughness of welding joints were good,their average tensile strengtb was 786 MPa,and the micro-hardness of the welding joints was 250 HV;the microstructures of laser wehling lines were columnar austenitic texture,and the micro-structures of heat affected zone were compact and the crystalline grains were tiny.

关 键 词：激光焊 对接接头 2-SUS301L-ST 奥氏体不锈钢材料 

分 类 号：TG457.11[金属学及工艺—焊接]