我国机床铸件目前还存在着强度和耐磨性偏低、内应力较大、材料品种不多等问题。为提高机床质量,采用低合金和复合孕育相结合的办法,使铸铁抗拉强度从20kg/mm~2提高到35kg/mm~2以上,机床导轨的硬度在不使用冷铁情况下稳定在HB200～250范围内,在不进行淬火情况下耐磨性 China’s machine tool casting there are still low strength and wear resistance, greater internal stress, material variety and other issues. In order to improve the quality of machine tool, the low alloy and compound inoculation are combined to increase the tensile strength of cast iron from 20kg / mm ~ 2 to over 35kg / mm ~ 2. The hardness of guide rail of machine tool is stable at HB200 without using cold iron ~ 250 range, without quenching wear resistance