惰性气体雾法化制备铜覆铁粉末特性研究

Research on characteristics of Fe wrapped with Cu powders prepared by inert gas atomization

摘要:

采用惰性气体雾化法制备了铜覆铁包覆粉末,并通过激光粒度仪、扫描电子显微镜、X 射线衍射分析仪、粉末流动性测定仪及松装密度测定仪等仪器研究了铜覆铁包覆粉末的粒度分布、组织结构、相组成、流动性及松装密度.结果表明：当前实验中较优的工艺参数为：熔炼温度1550℃,雾化压力4.5 MPa.在此条件下制得的粉末的中值粒径为106.30μm,微分分布曲线呈单峰且近似于正态分布；粉末相组成为 Cu 和α-Fe；大部分铜覆铁粉末呈多核结构及弥散分布,少量为鸡蛋状的单一核壳结构.粉末呈金黄色,松装密度达4.6 g/cm3,流动性为16.7 s/50 g.

Abstract:

Copper-iron powders were prepared by inert gas atomization. The size distribution, microstructure,phase structure,powders flow ability and apparent density of the copper-iron powder were investigated by laser scattering particle size distribution analyzer,electron probe microanalyzer,X-ray diffraction,metal powder flow meter and apparent density meter,respectively.The results show that the mean diameter of the powder is 106.30 μm under the condition of optimal process for melting temperature of 1550 ℃ and atomization pressure 4.5 MPa.The differential distribution curve of powder size exhibits unimodal form and a good fit to the normal distribution.The phase composition of the powders is Cu andα-Fe.A large amount of the powders are multi-cores and diffuse distribution microstructure,others are egg-type core microstructure.The powders show golden,apparent density of 4.6 g/cm3 and flow ability is 1 6.7 s/50 g.