| 本文已被：浏览 433次 下载 473次 |
码上扫一扫！ |
|
|
| 硼钢与铝合金的新型电阻单元焊技术 |
|
凌展翔1,2, 罗震1,2, 冯悦峤1,2, 李洋1,2
|
|
1.天津大学 材料科学与工程学院, 天津 300072;2.天津大学 天津市现代连接技术重点实验室, 天津 300072
|
|
| 摘要: |
| 文中使用了一种新型电阻单元焊技术，用来连接6061铝合金以及22MnMoB硼钢.“电阻单元焊”即在上板待焊区域预制工艺孔，将辅助单元塞入孔中，底部与上板持平，要求辅助单元与下板具有好的焊接性，最后使用电阻点焊机在辅助单元处进行焊接，试验中使用的辅助单元为Q235钢钉.研究了该工艺的接头力学性能、断口形貌、微观组织及硬度分布，并进行了电阻点焊试验作为对比.结果表明，传统的电阻点焊几乎无法连接硼钢及铝合金，而电阻单元焊新型工艺能够完成硼钢及铝合金的可靠连接，接头最大拉剪力达到7142 N，且塑性也十分优良. |
| 关键词: 硼钢 铝合金 电阻单元焊 力学性能 微观组织 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51275342，51405334）；高等学校博士学科点专项科研基金（20130032110004） |
|
| Novel resistance element welding of Al alloy to boron steel |
|
LING Zhanxiang1,2, LUO Zhen1,2, FENG Yueqiao1,2, LI Yang1,2
|
|
1.School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;2.Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China
|
| Abstract: |
| A novel resistance element welding (REW) technology was applied to join 6061 Al alloy to 22MnMoB boron steel. In REW process, a technological hole was drilled previously in Al sheet, and then a Q235 steel rivet was inserted into the hole. Resistance spot welding (RSW) was carried out in the location of rivet. The mechanical properties, fracture morphology and microstructure of resistance element welded joint were investigated and compared to those made by traditional resistance spot welding joints. The results show that RSW could barely join Al 6061 to boron steel, but the novel REW technology could realize reliable joining of these two materials. The maximum tensile shear load of joint was 7 142 N, and the toughness of joint was also satisfied. |
| Key words: boron steel aluminum alloy resistance element welding mechanical property microstructure |
