材料期刊网

在结合界面上生成层状的脆而硬的金属间化合物（TiAl3，TiAl和Ti3Al）是Al-Ti异种合金焊接所存在的主要问题。本工作基于国内外研究成果和相关资料，利用正交设计原理，以Al-11.5Si近共晶合金为基，通过添加元素Sn和Ga形成9种钎料，并利用各新钎料对Al合金和Ti合金进行了真空钎焊。通过进行剪切强度试验和铺展性试验，对该9种钎料进行评定。试验结果表明：含10%Sn、0.20%Ga的Al-11.5Si铝基钎料铺展性和抗剪强度等方面都具有较好的性能，使Al-Ti异种合金构件达到较好的机械性能。

The existence of brittle，stratiform and hard intermetallic compound（TiAl3，TiAl and Ti3Al） in the conjunction interface is the primary problem for the welding of dissimilar alloys of Al and Ti. Based on newest development and documents published in relevant fields, by using the principals of orthogonal experiment, based on the alloy of Al-11.5Si，9 types of brazing filler metals were confected by adding alloying elements Sn and Ga to Al-11.5Si close-eutectic alloys. The overall properties of the brazing filler metals were judged by anti-shear test，wettability experiments We tried to make a new proper brazing filler metal to braze the dissimilar alloys of Al and Ti alloys from it. The testing results showed that the brazing filler metal of Al-11.5Si close-eutectic alloys containing 10%Sn, 0.20%Ga has better property on extendibility and anti-shear intensity, and the component of dissimilar alloys of aluminum and titanium has better mechanical property than others when the brazing filler metal used to braze.