石墨及碳化物对高镍铬无限冷硬铸铁轧辊耐磨性的影响

本文研究了具有不同石墨和碳化物含量的高镍铬无限冷硬铸铁轧辊材料在滚动摩擦和干滑动摩擦条件下的摩擦学特性，考察了高镍铬无限冷硬铸铁中石墨和碳化物数量、分布对其摩擦学特性的影响。研究结果表明，组织中的石墨和碳化物数量、形态和分布对材料的耐磨性有较大影响。石墨含量在低于9．21％时，增加石墨量并适当减少碳化物量可以提高材料的耐磨性；呈均匀分布的长片状石墨和连续网状分布的碳化物对提高高镍铬无限冷硬铸铁轧辊的耐磨性有显著意义。

The effect of graphite and carbide on wear resistance of high Ni-Cr infinite chilled cast iron roll materials

The tribological property of high Ni-Cr infinite chilled cast iron with different quantity of graphite and carbide under rolling friction and dry sliding friction conditions was studied. The effect of the quantity and the distribution of graphite and carbide on the tribological behaviour was investigated,. The results show that wear resistance of the high Ni-Cr infinite chilled cast iron is strongly affected by the quantity, shape and distribution of graphite and carbide. When the quantity of graphite is below 9.21%, the wear resistance is improved by increasing the quantity of graphite and decreasing the quantity of carbide properly. The wear resistance of high Ni-Cr infinite chilled cast iron is significantly improved by flake graphite in uniform distribution and net carbide.