• 中国科技核心期刊(中国科技论文统计源期刊)

高强钢激光搭接焊接接头组织及显微硬度

刘庆永, 杜雁冰, 郭健, 夏明生

刘庆永, 杜雁冰, 郭健, 夏明生. 高强钢激光搭接焊接接头组织及显微硬度[J]. 焊接, 2017, (6): 61-65.
引用本文: 刘庆永, 杜雁冰, 郭健, 夏明生. 高强钢激光搭接焊接接头组织及显微硬度[J]. 焊接, 2017, (6): 61-65.
Liu Qingyong, Du Yanbing, Guo Jian, Xia Mingsheng. Microstructure and microhardness of laser overlap welded joint of high strength steel sheets[J]. WELDING & JOINING, 2017, (6): 61-65.
Citation: Liu Qingyong, Du Yanbing, Guo Jian, Xia Mingsheng. Microstructure and microhardness of laser overlap welded joint of high strength steel sheets[J]. WELDING & JOINING, 2017, (6): 61-65.

高强钢激光搭接焊接接头组织及显微硬度

Microstructure and microhardness of laser overlap welded joint of high strength steel sheets

  • 摘要: 采用光纤激光器对汽车工业中常用的双相钢HC450/780DPD+Z和低合金高强钢HC420LA进行激光搭接焊试验,探索焊缝附近微观组织和显微硬度转变,并研究不同焊接速度对焊缝显微硬度的影响。结果表明,焊缝附近微观组织主要包括熔化区、热影响区和母材三部分。焊接速度一定时,从母材到焊缝,HC420LA的显微硬度变化趋势为先增加后保持不变,HC450/780DPD+Z的显微硬度变化趋势为先增加后减小再保持不变。而随着焊接速度的增加,HC420LA焊缝显微硬度先增加后保持不变,HC450/780DPD+Z焊缝显微硬度先增加后减小。
    Abstract: Dual-phase steel DP780+Z and low alloy high strength steel HC420LA are commonly used in automobile industry, the research about laser overlap welding was carried out in this paper by using fiber laser welding system. The microstructure and microhardness near the weld were analyzed, and the influence of different welding speed on microhardness of weld were also studied. Results show that the microstructure of the joint mainly includes fusion zone, heat affected zone and base material. The microhardness of HC420LA steel shows the increasing trend from base material to weld at constant laser power. However the changing trend of DP780+Z is first increasing and then decreasing. With the increase of welding speed, the microhardness of HC420LA increases, and that of DP780+Z first increases and then decreases.
  • [1] 于 群. 车用双相钢DP780的激光焊接接头组织性能研究[D]. 北京: 北京工业大学硕士学位论文,2010.
    [2] 胡 唯,张延松. 焊接速度对高强钢激光焊热影响区软化的影响[J]. 热加工工艺,2013,42(9): 166-167.
    [3] 顾春影,陈根余,梅丽芳,等. 车身零部件的激光搭接焊与电阻点焊对比分析[J]. 热加工工艺,2011,40(17): 136-138.
    [4] 马东升. 超高强度钢激光焊接工艺与接头力学性能[J]. 电焊机,2011,41(12): 35-36.
    [5] 崔金鹏.高强度钢激光焊接的材料机理研究[D]. 上海: 上海交通大学硕士论文,2009.
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出版历程
  • 收稿日期:  2017-02-16
  • 发布日期:  2017-06-24

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