热成形硼钢激光焊接与电阻点焊接头性能对比研究  

Comparative Study on Joint Properties of Boron Steel by Laser Welding and Resistance Spot Welding

作　　者：李海宾[1] 陈铠[1] 肖荣诗[1] 陈树君[2] 

机构地区：[1]北京工业大学激光工程研究院,北京100124 [2]北京工业大学汽车结构部件先进制造技术教育部工程中心,北京100124

出　　处：《电加工与模具》2012年第1期20-23,28,共5页Electromachining & Mould

基　　金：国家科技重大专项(2009ZX04014-072)

摘　　要：分别采用CO2激光焊接系统和中频伺服电阻点焊设备,对超高强度热成形硼钢进行了焊接试验,测试了接头的抗剪切强度和显微硬度,观察了焊缝显微组织。结果表明:两种焊接方式均能获得成形良好的焊接接头,焊缝组织基本为马氏体,显微硬度与母材相当,激光焊缝的马氏体组织明显更细化、抗剪切强度也更高。An ultra-high strength boron steel was welded using CO2 laser welding system and in- termediate frequency inverter ＆ servo spot welding gun system, then the joint shear strength and micro-hardness were tested, microstructure was also observed. The results showed that the two welding methods can also obtain well-formed welded joints, the microstructure of weld metal is martensite, micro-hardness is equivalent to the base metal, the martensite obtained by laser welding is more fine than that obtained by resistance spot welding, and laser welding joints have got higher shear strength.

关 键 词：硼钢 激光焊接 电阻点焊 接头性能 

分 类 号：TG456.7[金属学及工艺—焊接]