电极感应气雾化法制备新型高硬度马氏体铁基合金粉末

Preparation of new high hardness martensitic iron-based alloy powders by electrode induction gas atomization

利用正交试验研究了电极感应气雾化(electrode induction gas atomization,EIGA)制粉工艺参数(雾化压力、雾化气体温度和熔炼功率)对新型高硬度马氏体铁基合金粉末粒径分布、粉末流动性和收得率的影响规律。结果表明,粉末粒径分布及其特征主要取决于雾化压力,粉末流动性及收得率主要受雾化压力及雾化气体温度的影响。当制粉工艺参数为雾化压力1.5 MPa、熔炼功率15 kW、雾化气体温度40℃时,所得粉末的收得率最高,粒径大小在53~180μm之间的粉末质量占比高达68.24%,兼具较好的粉末流动性及粉末粒度分布标准偏差,粉末形貌最佳。

The effects of the electrode induction gas atomization parameters(atomization pressure,gas temperature,and melting power)on the particle size distribution,powder fluidity,and yield of the new high hardness martensitic iron-based alloy powders were studied by orthogonal test.The results show that,the particle size distribution is mainly affected by the atomization pressure,while the fluidity and yield of the powders are affected by the atomization pressure and the gas temperature.When the atomization pressure is 1.5 MPa,the melting power is 15 kW,and the atomization gas temperature is 40℃,the powders have the largest powder yield,the mass proportion of powders with the particle size of 53~180μm accounts for 68.24%,and the powders show the well powder fluidity,the standard deviation of powder size distribution,and the best powder morphology.