本文根据我国资源情况,用正交试验法对合金白口铸铁成分进行选配,获得较佳成分为5％w 4％Cr,2％Mn。按照低应力磨料磨损另件的工作条件,我们用结构简单的砂水混合液试验装置,对各种材料进行耐磨试验。结果如下:金属的耐磨性一般与其硬度成正比,试样的宏观硬度及其碳化物的显微硬度,分别要求大于57HRC和1100HV。 In this paper, according to the situation of our country, orthogonal experiment was used to match the composition of white cast iron, and the best composition was 5% w 4% Cr and 2% Mn. In accordance with the working conditions of low stress abrasive wear pieces, we use a simple structure of sand and water mixture test device, a variety of materials wear test. The results are as follows: The wear resistance of metal is generally proportional to its hardness, the macroscopic hardness of the sample and its microhardness of the carbide, respectively, greater than 57HRC and 1100HV.