铝钢点焊铆接复合连接技术

发布时间：2018-06-28 22:06

本文选题：点铆焊 + 力学性能　；参考：《焊接学报》2017年02期

【摘要】：提出了一种点焊与铆接复合进行铝钢连接的技术,即在待焊试样区域预制工艺孔,将铆钉铆入孔中,利用铆接力实现试样的预连接.然后使用点焊机在铆接位置进行点焊,实现铆接与点焊的复合连接,称为"点铆焊".文中分析了该方法的力学性能、微观组织、断裂模式,并同纯点焊与纯铆接进行了比较.结果表明,点铆焊的抗拉强度比纯点焊提高了23.8%,比纯铆接提高了28.7%,失效前吸收功比纯点焊提高211%,比纯铆接提高67%.虽然在点铆焊过程中也会产生脆性金属间化合物,但这些区域并不是主要的承载部位,点铆焊为塑性断裂模式.
[Abstract]:In this paper, a technique of spot welding and riveting combined to connect aluminum steel is put forward, that is, rivets are riveted into the holes in the prefabricated process holes in the area of the specimens to be welded, and the riveting force is used to realize the pre-joining of the samples. Then spot welding machine is used in riveting position to realize the compound connection of riveting and spot welding, which is called "spot riveting welding". The mechanical properties, microstructure and fracture mode of the method are analyzed and compared with that of pure spot welding and pure riveting. The results show that the tensile strength of spot riveting is 23.8 higher than that of pure spot welding, 28.7% higher than that of pure riveting, 211.1% higher than that of pure spot welding before failure, 67% higher than that of pure riveting. Although brittle intermetallic compounds are also produced in the spot riveting process, these areas are not the main load-bearing sites, and the spot riveting is a plastic fracture mode.
【作者单位】：天津大学材料科学与工程学院;天津大学天津市现代连接技术重点试验室;
【基金】：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)
【分类号】：TG453.9

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