Because of rough condition of wet ball mill, the service life of the liner made from traditional materials, such as high Mn steel, alloy-steel etc, is less than ten months. High Cr cast iron/carbon steel liner of wet ball mill has been developed successfully based on lost foam composite casting. According to the microstructure of composite interface, the boundary of composite interface in the bi-metal combination regions was staggered like dogtooth, two liquid metals was not mixed and the interface presented excellent metallurgical bonding state. Comprehensive mechanical properties were studied. The result shows that the hardness of HRC＞61, the impact toughness αK>16 J/cm2, and bending strength >1 580 Mpa. The eight months test in wet grinding environment shows that the service life of the bi-metal composite liner is three times as long as that of the one made from alloy steel.%矿山用湿式球磨机内衬板的服役条件十分恶劣,传统高锰钢、合金钢材质的衬板寿命普遍低于10个月.基于消失模双液双金属复合铸造技术,成功地开发出耐湿磨的碳钢-高铬铸铁双金属衬板.微观金相显示,材料结合界面呈现犬牙交错状的良好冶金结合；经力学性能测试,硬度HRC＞61,冲击韧性αK＞16 J/cm2,抗弯强度大于1580 MPa.经8个月装机试验,双金属衬板在湿式球磨机的服役环境中,相对耐磨系数是某合金钢衬板的3倍.
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