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材料导报  2019, Vol. 33 Issue (15): 2479-2482    https://doi.org/10.11896/cldb.18090046
  材料与可持续发展（二）——材料绿色制造与加工* |
铝/钢电弧辅助激光对接熔钎焊接头组织及力学性能
于晓全1,樊丁1,2,黄健康1,2,李春玲1
1.兰州理工大学材料科学与工程学院,兰州 730050
2.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
Microstructure and Mechanical Property of Arc-assisted Laser Welding-brazing Butt Joint of Aluminum and Steel
YU Xiaoquan1, FAN Ding1,2, HUANG Jiankang1,2, LI Chunling1
1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050
2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050
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摘要 使用电弧辅助激光方法实现了铝合金和热镀锌钢的对接熔钎焊。对接头不同区域的组织构成及分布进行了分析,并对熔钎焊接头的力学性能进行测试,讨论了接头拉伸力学性能的影响因素及断裂行为。结果表明:根据焊缝成形可将熔钎焊对接接头分为铺展区、焊缝区、界面区,整个对接接头主要由α-Al柱状组织、Al-Fe金属间化合物等微观组织构成。根据断裂位置的不同,将接头的断裂分为两种典型的模式:由于晶界元素偏析而引起的焊缝区断裂,以及金属间化合物引起的铝/钢界面区断裂。接头的抗拉力学性能由焊缝成形、焊缝组织及金属间化合物等多种因素共同决定。
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于晓全
樊丁
黄健康
李春玲
关键词:  铝合金/镀锌钢  电弧辅助激光熔钎焊  显微组织  力学性能    
Abstract: Using arc-assisted laser welding-brazing method, an aluminum alloy was joined to steel in a butt configuration. The composition and distribution of microstructure in different zones of the joint were analyzed, and the mechanical properties of the weld joint were tested. The effect factors of tensile mechanical properties and the fracture behavior of the joint were discussed. The results show that, according to the formation of weld joint, the welding-brazing butt joint can be divided into fusion zone, wetting-spreading zone and interface zone. The joint is mainly composed of α-Al columnar crystal microstructure and Al-Fe intermetallic compound. According to the fracture location, the fracture of the joint can be divided into two typical modes: the fracture in the fusion zone, which caused by the segregation of grain boundary, and the fracture at the Al/steel interface zone caused by the intermetallic compounds.
Key words:  aluminum alloy/galvanized steel    arc-assisted laser welding-brazing    microstructure    mechanical property
               出版日期:  2019-08-10      发布日期:  2019-07-02
ZTFLH:  TG457  
基金资助: 国家自然科学基金(51465031); 甘肃省基础研究创新群体计划(17JR5RA107); 甘肃省高校协同创新团队项目(2017C-07)
作者简介:  于晓全,1989年出生,2010年毕业于佳木斯大学,获得焊接技术与工程学士学位,现为兰州理工大学材料科学与工程学院博士研究生,导师樊丁。主要从事异种金属激光焊方面研究。
樊丁,教授,兰州理工大学博士研究生导师,1982年毕业于甘肃工业大学,1984年毕业于西安交通大学获硕士学位,三次作为访问学者在日本大阪大学深造学习及合作研究。1993年获得国务院特殊津贴。主要从事焊接物理,焊接方法与智能控制及激光加工等方面的研究,发表论文300余篇。
引用本文:    
于晓全,樊丁,黄健康,李春玲. 铝/钢电弧辅助激光对接熔钎焊接头组织及力学性能[J]. 材料导报, 2019, 33(15): 2479-2482.
YU Xiaoquan, FAN Ding, HUANG Jiankang, LI Chunling. Microstructure and Mechanical Property of Arc-assisted Laser Welding-brazing Butt Joint of Aluminum and Steel. Materials Reports, 2019, 33(15): 2479-2482.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.18090046  或          http://www.mater-rep.com/CN/Y2019/V33/I15/2479
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