S355J2W+N钢激光-MAG复合焊与MAG焊对比  

Comparison Between Laser-MAG Hybrid Welding and MAG Welding of S355J2W+N Steel

作　　者：谷晓鹏[1] 段珍珍[2] 邓钢[2] 谷晓燕[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]长春轨道客车股份有限公司,长春130062

出　　处：《材料工程》2015年第2期20-25,共6页Journal of Materials Engineering

摘　　要：利用激光-MAG复合焊和MAG焊进行了厚板S355J2W+N低碳钢的焊接实验,分析了两种焊接方法接头的微观组织和力学性能。结果表明:复合焊和MAG焊焊缝接头均由焊缝区、过热区、重结晶区和不完全重结晶区构成,复合焊接头截面呈"高脚杯"状特点,焊缝填充量和热影响区宽度较MAG焊明显减小。复合焊由于冷却速率快,过热区魏氏组织略有增多,硬度高于MAG焊,抗拉强度和弯曲性能与MAG焊相比,无显著差异,均能够满足生产标准的要求。Welding research on thick low carbon steel plate of S355J2W＋N was done by using laserMAG hybrid and MAG welding.Microstructure and mechanical properties of the joints were analyzed.The results show that the hybrid and MAG welded joint is composed of welding seam zone,over-heated zone,annealed zone and local annealed zone.The cross-section of hybrid welded joint shows a goblet appearance and the wire accumulation and width of HAZ are significantly reduced compared with MAG welding.The Widmanstaten structure in over heated zone increases a little bit due to fast cooling speed in hybrid welding.The hardness is higher than that of MAG welding.There is no significant difference in the tensile strength and bending property between hybrid welded joint and MAG welded joint.The tensile strength and bending property of hybrid welded joints and MAG welded joints both meet production standards.

关 键 词：S355J2W+N 激光 MAG 复合焊 接头组织 性能 

分 类 号：TG456.7[金属学及工艺—焊接]