铸铁与铬丝原位反应的研究

Research on In-situ Reaction of Cast Iron and Cr Wires

采用1135℃×20min的工艺,让提前置于铸铁中的铬丝与周围碳原子原位反应生成M7C3[(Fe,Cr)7C3]型铸铁复合材料,对复合区进行显微组织观察分析、显微硬度测量、耐磨性能测试。结果表明,复合区硬度最高达到1750HV0.05,平均硬度是基体的9～11倍。复合材料的耐磨性相对于铸铁标准试样提高了2.89倍。

The Cr/Fe composite was prepared using cast iron and Cr wires in-situ reacted at 1135 ℃ for 20 min. The microstructure, microhardness and wear-resistance of compound region were observed and measured. The results show that the maximal microhardness is 1750 HV0.05, and the average microhardness is 9-11 times higher than that of substrate. The wear-resistance of the composite is 2.89 times higher than that of the cast iron standard sample.