硅-铁均匀包覆型复合粉的制备方法

Preparation of Composite Iron Powders Coating with Silicon

为了实现质量分数6.5%Si-Fe合金的直接轧制成型,需要首先获得具有塑性变形能力的硅-铁均匀包覆型复合粉。探索了利用混合球磨技术制备硅-铁均匀包覆型复合粉的方法。利用电子探针分析了不同球磨条件下,Si、Fe元素分布及Fe颗粒的变形程度。结果表明:当球料比5∶1、转速350 r/min、球磨2 h时,可以获得Si均匀包覆于Fe表面、并且Fe颗粒不变形的Si-Fe包覆型复合粉。

It is important to prepare plastic iron powders coating with silicon in order to roll the 6.5 % Si-Fe directly to form the composite sheet. MA （Mechanical Alloying） was applied in this paper to fabricate the coating powders. The results were analyzed by EPMA and XRD to estimate the powder properties under different MA condition. The optimum MA condition was found. The prepared composite powders have the potential of plastic deformation.