DC04薄钢板的脉冲激光焊接工艺研究  

Research on pulsed laser welding technology of DC04 thin steel sheet

作　　者：孙希庆[1] 洪永昌[1] 张武[2] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]马钢技术中心,安徽马鞍山243000

出　　处：《电焊机》2010年第5期130-134,共5页Electric Welding Machine

摘　　要：采用正交试验优化和金相组织分析以及力学性能测定,对厚度1.0mm的DC04薄钢板进行脉冲激光焊接工艺研究。试验结果表明,焊接过程中脉冲频率是影响焊缝表面形貌的最大因素。获得最佳工艺参数组合是焊接电压260V、脉冲频率20Hz、脉冲宽度12ms和焊接速度275mm/min。焊缝中心区域显微硬度最高,焊接接头的抗拉强度略高于母材。焊缝中心区组织主要为铁素体和少量粒状贝氏体,热影响区组织主要为垂直于焊缝方向的较为粗大的铁素体。Pulsed laser welding 1.0 mm DC04 thin steel sheet is researched by using orthogonal test method, microstructure analysis and mechanical property analysis.It is found that pulse frequency is the biggest affecting factor on welding surface morphology.And optimal parameters are 260 V welding voltage,20 Hz pulse frequency, 12 ms pulse width and 275 mm/min welding speed.The maximum microhardness is weld center area, and the tensile strength of weld joint is higher than the base metal.The microstructure of weld center areas are mainly of ferrite and a small amount of granular bainite, while the mierostructure of HAZ is a bit thick ferrite.

关 键 词：脉冲激光 焊接工艺 正交试验 组织 性能 

分 类 号：TG457[金属学及工艺—焊接]