镍硬Ⅳ型铸铁是一种含镍铬的抗磨铸铁,它的优异的耐磨性及淬透性,使它富有竞争能力。本文试图找寻一种与之相当的耐磨铸铁,但不用镍,而用钼和铜。为了节约使用钼元素,文中通过实验确定了合理的钼含量,并且发现,应该根据铸件壁厚来选择碳量、钼量和淬火温度,才能使9％Cr白口铁的常规力学性能达到镍硬Ⅳ型铸铁的水平。 Nickel hard type IV cast iron is a nickel-chromium-containing cast iron, its excellent wear resistance and hardenability, making it competitive. This article attempts to find a comparable wear-resistant cast iron, but not nickel, but with molybdenum and copper. In order to save the use of molybdenum, the paper determined the reasonable molybdenum content through experiments and found that the conventional mechanical properties of 9% Cr white-iron should be as high as that of nickel hard Ⅳ type of cast iron level.