吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (2): 516-521.doi: 10.13229/j.cnki.jdxbgxb201602028

• 论文 • 上一篇    下一篇

5A06铝合金/镀锌钢预置涂粉对接激光熔钎焊组织与性能

李春玲, 樊丁, 王斌, 余淑荣   

  1. 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室,兰州 730050
  • 收稿日期:2014-04-09 出版日期:2016-02-20 发布日期:2016-02-20
  • 通讯作者: 樊丁(1962-),男,教授,博士生导师.研究方向:焊接方法与焊接物理,材料激光加工.E-mail:fand@lut.cn E-mail:yxplcl@lut.cn
  • 作者简介:李春玲(1981-),女,讲师,博士研究生.研究方向:材料激光加工.E-mail:yxplcl@lut.cn
  • 基金资助:
    国家自然科学基金项目(51465031); 兰州市科技局项目(2014-2-12)

5A06 aluminum alloy and galvanized steel butt welding-brazing by laser with preset filler powder

LI Chun-ling, FAN Ding, WANG Bin, YU Shu-rong   

  1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
  • Received:2014-04-09 Online:2016-02-20 Published:2016-02-20

摘要: 通过预置金属粉末的方法实现了5A06铝合金/镀锌钢异种金属涂粉的对接熔钎焊连接,获得了具有熔焊和钎焊双重特征的对接接头.运用扫描电镜(SEM),能谱仪(EDS)及X射线衍射仪(XRD)分析了接头微观结构和成分,并测试了接头力学性能.结果表明:界面处形成了厚度不均的锯齿状金属间化合物层,化合物层由Fe2Al5和FeAl3组成,厚度约2.5~7 μm.在镀锌钢的上表面钎焊界面处,金属间化合物层最厚,其厚度随激光功率的增加而增大.采用预置金属粉末,在合适的焊接参数下,可以控制金属间化合物层厚度最大不超过10 μm,得到具有一定抗拉强度的铝/镀锌钢对接接头.

关键词: 金属材料, 铝/钢, 激光熔钎焊, 金属间化合物, 力学性能

Abstract: Laser welding-brazing of 5A06 aluminum alloy and galvanized steel sheet with filler powder was carried out. The obtained butt joint exhibited dual characteristics. The interfacial properties and microstructure of the joints examined using Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometer (EDS) and X-ray Diffraction (XRD), and the tensile strength was measured. Results show that a non-uniform intermetallic compound (IMC) with serrated shape is formed at the interfacial layer, which is composed of Fe2Al5 and FeAl3. The thickness of the IMC layer varies from 2.5 ~ 7 μm, and it increases with the laser power. At the top surface of the galvanized steel the IMC layer reaches the thickest. Using this laser welding-brazing method with special filler powder, the IMC thickness can be controlled to less than 10 μm, and butt joints with certain tensile strength can be obtained under appropriate welding parameters.

Key words: metallic materials, aluminum alloy and steel, laser welding-brazing, intermetallic compounds, mechanical property

中图分类号: 

  • TG456
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