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通过正交设计和极差分析研究了超音速电弧喷射雾化制取AgNiCu15-5粉末工艺参数的优化,并运用SEM、XRD对制备的粉末进行了表征。结果表明,影响粉末粒度在25～38μm范围的质量分数的工艺参数的主次顺序为:雾化距离L>电弧电流I>电弧电压U>雾化气压P;优化的制粉工艺参数为L1I1U2P1,即雾化距离L为250 mm、电弧电流I为100 A、电弧电压U为32 V、雾化气压P为0.8 MPa。在优化的实验条件下,制备出了粒度分布均匀的球形AgNiCu15-5粉末,其中94%以上的粉末粒度小于38μm。
Orthogonal design and range analysis were used to optimize the technological parameters of AgNiCu15-5 powder prepared by supersonic arc spray atomization. The prepared powders were characterized by SEM and XRD. The results show that the main order of the process parameters affecting the mass fraction of the powder particle size in the range of 25 ~ 38μm is the atomization distance L> arc current I> arc voltage U> atomization pressure P; the optimized milling parameters are L1I1U2P1, That is, the atomization distance L is 250 mm, the arc current I is 100 A, the arc voltage U is 32 V, and the atomization gas pressure P is 0.8 MPa. Under optimized experimental conditions, spherical AgNiCu15-5 powders with uniform particle size distribution were prepared, of which more than 94% had a particle size less than 38μm.