摘要
由于铝合金较活泼、导热导电性好、线膨胀系数大,因此在进行点焊时常会有气孔、裂纹、咬边、焊缝成形差等缺陷出现,导致焊后接头力学性能下降。为了减少或避免这些缺陷的出现,提高点焊质量,考虑采用加入不同微量合金元素的方法。试验证明,该方法是很有效的。本文简要阐述了微量合金元素Ti和Zr的组织变化机理,并通过抗拉试验得出了一些结论。
Because aluminium alloy has an active character, a large linear expansibility and does well in heat conduction and electric conduction, it always appears some flaws when spot welding is in process, such as blow hole, crack, undercut, bad appearance of weld,and so on. It also falls down the mechanical property of the joint after welding. For the sake of reducing or avoiding these flaws and improving the welding quality, the method of adding different microscale alloying agents is considered. The experimental results prove that the method is very effective. The article briefly describes the mechanism of structural change of the alloying agents (Ti, Zr) and educes some conclusion through the stretching experiment.
出处
《焊接技术》
北大核心
2008年第2期9-12,共4页
Welding Technology
基金
国家自然科学基金(50575159)
教育部基金(106049
20060056058)
天津市应用基础研究计划基金(06YTJMJC03400)资助项目
关键词
铝合金
电阻点焊
调质
合金元素
aluminium alloy,resistance spot welding,slack quench,alloy element
