还原-磨选法制备铁粉的组织与性能

Microstructure and Performance of Iron Powders Prepared by Reduction-grinding and Seperation

通过元素分析、扫描电镜、流动性、松装密度和压缩性能测定,对还原-磨选法制备的铁粉进行成分、显微组织和机械性能分析。结果表明:采用还原-磨选法以低品位钒钛磁铁矿为原料制备铁粉,还原铁粉中Ti、V、Co、Ni等元素以固溶和游离两种形式存在,粉末的成分和性能均符合国家标准,并与瑞典赫格纳斯铁粉相接近,该铁粉制备工艺简单、生产成本低且产品性能稳定,有利于提高铁基粉末冶金材料性能。

The constituent, microstructure and mechanical analysis of iron powders prepared by reduction-grinding and separation were investigated by element analysis, scanning electronic microscope （SEM）, fluidity, apparent density and compressibility testing. The results show that the element （such as Ti, V, Co, Ni） are both solid-solution and free forms in the iron powders prepared by reduction-grinding and separation. The powder composition and performance comply with national standards, and are close with the iron powders of Swedish Hoganas. It is conducive to improve the properties of ferrous powder metallurgy materials by the simple preparation process, low production cost and stable product performance.