铝钒合金化对高铬铸铁组织与性能的影响

探讨了铝、钒合金化对屈氏体高铬铸铁组织与性能的影响。实验结果表明,含Al 0.20％—0.30％ 可显著改善碳化物的大小及分布,使其变成岛状,并细化了基体组织,提高其耐磨性及冲击韧性。含 V 0.40％—0.50％ 可使铸态高铬铸铁的冲击韧性、硬度及耐磨性均得到提高。因此,采用铝、钒合金化办法,是改善高铬铸铁组织与性能的有效途径之一。

Alloying Contributions of Al and V to Microstructure and Properties of High-Chromium Cast Iron

Alloying effects of Al and V on the microstructure and properties of high-chromium troosite cast iron were studied. Experimental results show that for such cast iron,if containing 0.20wt%-0.30wt% of Al, the size and distribution of carbides can singificantly be improved so as to transform carbides into island morphology and refine the matrix structure with wearability and impact toughness both enhanced.If containing 0.40wt%-0.50wt% of V.the impact toughness, hardness and wearability of the as-cast high-chromium cast iron will all be improved as well. Alloying of Al and of V are therefore regarded as an effective way to improve the microstructure and properties of high-chromium cast iron.