气雾化制备Al-Si钎料粉末的研究  

The development of Al-Si braze powder produced by gas atomization

作　　者：杨凯珍[1] 刘福平[1] 黄云帅[1] 

机构地区：[1]广州有色金属研究院,广东广州510650

出　　处：《材料研究与应用》2007年第3期210-213,共4页Materials Research and Application

摘　　要：针对铝/不锈钢大面积钎焊对钎料的特殊要求,采用气雾化法制备了Al-Si共晶合金钎料粉末,并对雾化金属熔体质量流率、雾化气体压力及雾化温度等影响雾化效果的主要因素进行了研究.结果表明,在金属液流直径dt=5 mm,雾化气体压力P=1.0 MPa,雾化温度720～770℃的条件下,可制备出75～350μm粉末的质量分数达90%以上的钎料,其各项性能指标均达到法国同类产品的水平.In this paper, corresponding to the special requirement for brazing filler metal of large area brazing of aluminum/stainless steel, the gas atomization process was used to prepare Al-Si brazing powder with the eutectic composition. The effect of process parameters of melt flow rate, atomization gas pressure and temperature on the atomization result have been studied, the result indicates： under the conditions of the melt flow diameter of dt= 5.0mm, atomization gas pressure of P=1. 0MPa and atomization temperature of 720-770℃, production rate of the qualified aluminum alloy filler metal powder of particle size 75- 350 μm is over 90%wt, the product quality of Al-Si eutectic alloy brazing powder is same as that of the product made by France.

关 键 词：气流雾化 粉末钎料 AL-SI共晶合金 钎焊 

分 类 号：TF125.2[冶金工程—粉末冶金]