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山东大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (3): 73-79.doi: 10.6040/j.issn.1672-3961.0.2014.225

• 机械工程 • 上一篇    下一篇

雨刮器压铸模具激光填丝焊修复性能

刘立君1, 张红兴1,2, 张伟杰1,2, 王刚1,3, 齐萌1,2   

  1. 1. 浙江大学宁波理工学院, 浙江 宁波 315100;
    2. 太原科技大学机械工程学院, 山西 太原 030024;
    3. 哈尔滨理工大学材料科学与工程学院, 黑龙江 哈尔滨 150080
  • 收稿日期:2014-08-21 修回日期:2015-03-18 发布日期:2014-08-21
  • 通讯作者: 张红兴(1989- ),男,山东济宁人,硕士研究生,主要研究方向为激光模具强化及修复再造技术. E-mail:zhanghx0531@163.com E-mail:zhanghx0531@163.com
  • 作者简介:刘立君(1968- ),男,黑龙江哈尔滨人,教授,硕导,主要研究方向为激光模具强化及修复再造技术. E-mail:888liulijun@163.com
  • 基金资助:
    浙江省零件轧制成形技术研究重点实验室开放基金资助项目(ZKL-PR-200303);宁波市自然基金资助项目(2014A610078);国家自然科学基金资助项目(51275468)

The property of die-casting dies of wiper repaired by laser welding with filler wire

LIU Lijun1, ZHANG Hongxing1,2, ZHANG Weijie1,2, WANG Gang1,3, QI Meng1,2   

  1. 1. Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, Zhejiang, China;
    2. College of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, China;
    3. College of Material Science & Engineering, Harbin University of Science and Technology, Harbin 150080, Heilongjiang, China
  • Received:2014-08-21 Revised:2015-03-18 Published:2014-08-21

摘要: 为了解决模具表面龟裂问题,采用激光技术和仿生技术相结合的方法进行修复。利用激光填丝焊修复的方法,在模具试样表面制备修复层,对修复层进行组织观察、硬度分析及X射线能谱分析,得出激光填丝焊修复的最优工艺参数为电流180 A,离焦量-10 mm,激光脉宽8 ms,填丝速度0.032 m/min,并对修复的模具进行热疲劳试验和寿命测试。试验结果表明,利用激光填丝焊修复受损模具,提高模具表面硬度,有效细化组织晶粒,延长模具使用寿命,为压铸模具修复提供一种新的思想。

关键词: 压铸模具, 激光技术, 激光焊接, 填丝焊, 热疲劳, 组织特征

Abstract: In order to solve the problem of cracks on die-casting dies, the method of combining laser technology and bionic technology was used to repair them. Repairing layer on die-casting dies was prepared utilizing the method of laser wire filling welding; the optimal process parameters were obtained through the microstructure observation, hardness analysis and energy-dispersive X-ray analysis. These parameters were that the current was 180 A, the defocusing amount was -10 mm, the laser pulse width was 8 ms, the wire filling speed was 0.032 m/min, and thermal fatigue test and life test of die-casting dies were performed using these parameters. The experimental results showed that hardness of die-casting dies surface were improved, tissue grain was refined effectively, and the life of mold was extended, which could provide a new thought for repairing the die-casting dies.

Key words: laser welding, welding with filled wire, microstructure characteristics, thermal fatigue, laser techniques, die-casting dies

中图分类号: 

  • TG174
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