發(fā)布時間：2018-06-16 07:11

  本文選題：Mg-Al + Ni箔��； 參考：《材料工程》2015年01期

【摘要】：采用擴散焊接工藝,通過添加Ni箔中間層對鎂鋁異種金屬進行焊接。利用無損檢測、電子探針、掃描電鏡、萬能材料試驗機研究了Mg/Ni/Al焊接接頭界面的組織結構和力學性能。結果表明:Ni箔中間層可以有效阻止界面處Mg,Al元素的相互擴散,接頭界面處沒有生成Mg-Al金屬間化合物。在焊接溫度440℃,保溫時間90min時,接頭抗剪強度達到最大值20.5MPa。Mg/Ni/Al接頭由Al,Ni和Mg,Ni的相互擴散形成,接頭界面形成Al-Ni過渡區(qū)和Mg-Ni過渡區(qū),界面主要物相分別為Al3Ni2,Al3Ni和Mg2Ni,過渡區(qū)厚度隨焊接溫度升高而增加。
[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，

本文編號：2025844