添加Ni箔中间层的Mg-Al扩散焊接接头界面结构和力学性能

发布时间：2018-06-16 07:11

  本文选题：Mg-Al + Ni箔　； 参考：《材料工程》2015年01期

【摘要】：采用扩散焊接工艺,通过添加Ni箔中间层对镁铝异种金属进行焊接。利用无损检测、电子探针、扫描电镜、万能材料试验机研究了Mg/Ni/Al焊接接头界面的组织结构和力学性能。结果表明:Ni箔中间层可以有效阻止界面处Mg,Al元素的相互扩散,接头界面处没有生成Mg-Al金属间化合物。在焊接温度440℃,保温时间90min时,接头抗剪强度达到最大值20.5MPa。Mg/Ni/Al接头由Al,Ni和Mg,Ni的相互扩散形成,接头界面形成Al-Ni过渡区和Mg-Ni过渡区,界面主要物相分别为Al3Ni2,Al3Ni和Mg2Ni,过渡区厚度随焊接温度升高而增加。
[Abstract]:A diffusion welding process was used to weld magnesium and aluminum dissimilar metals by adding Ni foil interlayer. The microstructure and mechanical properties of mg / Ni / Al welded joints were studied by means of nondestructive testing, electron probe, scanning electron microscope and universal material testing machine. The results show that the Mg-Al intermetallics at the interface can be effectively prevented by the interlayer of 1: Ni foil, and no Mg-Al intermetallic compounds are formed at the interface of the joint. When the welding temperature is 440 鈩，

本文编号：2025844