钛合金TC4与1Cr18Ni9Ti不锈钢的扩散焊工艺探索

选有纯铜和纯镍作为中间层金属，探索ＴＣ４钛合金和１Ｃｒ８Ｎｉ９Ｔｉ不锈钢的真空扩散焊工艺，采用金相法，扫描电镜，Ｘ射线衍射等手段对接头界面附近的微区进行了较详细的分析，结果表明，采用上述中间层进行ＴＣ４－１Ｃｒ１８Ｎｉ９Ｔｉ的扩散焊时，Ｃｕ和Ｔｉ产生强烈的共晶反应，但并末阻止Ｔｉ向不锈钢中扩散，各元素相互扩散的结果，使接头中形成多层次的不同组织和多种化合物，导致接头强度较低，呈脆性断裂。

STUDY ON DIFFUSION WELDING OF TC4 TITANIUM ALLOY AND 1Cr18Ni9Ti STAINLESS STEEL

The diffusion welding of titainium alloy (Ti-6Al-4V) and stainless steel (1Cr18Ni9Ti)is studied by using pure copper and nickel as an intermediate layer. Using microscopic examination, SEM and X-ray diffraction analyze for micro zone of weld interface, the test result shows using Cu or Ni as an interrneaiate layer,can not prevent diffusion of Ti to stainless steel. Diffusion of elements forms different phase and varied compounds in the bond. In this case,the strength of the bond is low and the bond appears brittle fracture.