粉状铝基钎料的钎焊性能研究

介绍了粉状铝基钎料的制备方法,探讨了以粉状铝基钎料为焊料,钎焊铝材的工艺性能,从表面张力的角度出发,讨论了粉末粒度对铝材钎焊工艺和性能的影响,结果表明:采用粒度在150～180 μm的粉状铝基钎料钎焊铝材,其焊件的剪切强度较高;采用粒度大于300,μm的粗钎料或粒度小于150 μm的细钎料钎焊铝材,其剪切强度较低,粉状...

Research on brazeability of aluminum-silicon filler metal powder

This paper briefly introduces the preparation process of aluminum-silicon filler metal powder,and exploits the aluminum brazeability using the above-mentioned powder as the solder.It discusses the influence of powder sizes on the process and performance of aluminum brazing from the aspect of surface tension.The result shows: brazed aluminum plates with powder sizes between 150-180 micron can get higher sheer strength,while brazing with course powder(>300 micron) or fine powder(<28 micron),the shear strength is lower.The oxygen content of the aluminum-silicon filler metal powder increases with the decrease of the powder size.Brazing with the aluminum-silicon filler metal powder which contains less than 3% fine powder(<28 micron) can get spreading area as nearly large as that brazing without the fine powder.