用Al-Ti-Al合金钎料复合板钎焊钛的研究

Study of Titanium Brazing with Al-Ti-Al Clad Metal Sheet

介绍了用Al－Ti－Al合金金属复合板钎焊工业纯钛的研究结果。这种金属复合板是采用特殊的轧制复合工艺加工而成的。复合板的两个外表面包含一层0．1mm厚的Al合金钎料，其中间夹层是0．4mm厚的工业纯钛板。在本实验中用这种复合板替代传统单一的Al合金钎料薄片来钎焊钛的蜂窝结构，其结果是简化了钎焊工艺，使焊点更加均匀。同时还研究了焊缝的剪切强度，宏观和显微组织。并比较了用单一Al合金钎料薄片钎焊和用该复合板钎焊焊缝的剪切强度。结果表明，用该复合板钎焊的焊缝具有足够高的剪切强度，可达76MPa以上。

The results of a study of commercial pure (C P) titanium brazing with Al - Ti - Al clad metal sheet are presented. The clad metal sheet has been produced by a proprietary roll bonding process. Both surfaces of the clad metal sheet are coated with an Al alloy brazing layer to a thickness of 0. 1 mm; the central sheet is C P titanium with thickness of 0. 4 mm. The clad metal sheet has been used as a substitute for monometallic Al alloy brazing foil in the braze bonding of titanium honeycomb structures; its use makes the brazing process simply and homogenizes the brazing bonding. The shear strength, macro - and microstructure of the brazed bond are investigated. The shear strength values of the joint welds with different brazing sheets are compared. The results show that the clad metal sheet braze bonded structure has a sufficiently high shear strength, more than 76 MPa.Correspondent: Luo Guozhen, Professor, Northwest institute for Nonferrous Metal Research, Xi'an 710016, P. R, China, Tel:086-29-6231078