上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (07): 1103-1106.

• 金属学与金属工艺 • 上一篇    下一篇

超高强热成形钢B1500HS的 电阻点焊工艺和接头性能  

杨柳1，程轩挺2，孙游2，吴嘉元2，王敏1，刘宇3   

  1. (1. 上海交通大学 上海市激光制造与材料改性重点实验室, 上海 200240；2. 上海翼锐汽车科技有限公司， 上海 201814;3. 天津七所高科技有限公司， 天津 300409)  
  • 收稿日期:2011-08-03 出版日期:2012-07-30 发布日期:2012-07-30
  • 基金资助:

    上海市汽车工业科技发展基金（1102）

Technology and Weldability of Resistance Spot Welding of B1500HS Hot-Stamped Steel

 YANG  Liu-1, CHENG  Xuan-Ting-2, SUN  You-2, WU  Jia-Yuan-2, WANG  Min-1, LIU  Yu-3   

  1. (1. Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiaotong University, Shanghai 200240,China;2. Shanghai Yirui Automobile Technology Co., Ltd, Shanghai 201814, China;3. Tianjin 707 Hightech Co.,Ltd, Tianjin 300409, China)
  • Received:2011-08-03 Online:2012-07-30 Published:2012-07-30

摘要： 摘要： 
采用工频交流焊机对厚度为1.5 mm的国产超高强热成形钢板B1500HS进行点焊操作，研究其适用性，并对焊接接头的力学性能、显微硬度、微观组织、拉伸断口进行分析.结果表明，热成形钢电阻点焊性能良好，熔核直径和焊点拉剪强度均满足要求，熔核区组织为板条马氏体，拉伸时呈现钮扣状断裂，断口形貌具有塑性韧窝特征，软化区的存在是接头正拉强度显著降低的主要原因.
关键词： 
热成形钢板； 电阻点焊； 工频交流； 接头强度
中图分类号：  TG 453.9
文献标志码：  A    

Abstract: Resistance spot welding of B1500HS hot-stamped steel with 1.5 mm was researched, using power-frequency alternating current welding equipment. The tension strength, hardness distribution, microstructure and the cross-tensile fracture appearance were analyzed. The test results show that the hot stamped steel has good weldability, and the nugget diameters and tensile shear strength both meet production requirements. The microstructure of spot welded metal is martensite. It is easy to get button fracture mode and shear dimples. The cross-tensile strength has sharply decreased, mainly as a result of the existence of softened zone in plastic ring.

Key words: hot-stamped steel, resistance spot weld, power-frequency alternating current, strength of joint