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对钢／高铬铸铁镶铸件的热裂问题进行了数值模拟和实验研究，数值模拟时采用放大液态金属导热系数以及假定镶块周围金属液保持在浇注温度不变来当量金属液流动作用对温度场的影响。指出在镶铸工艺中，本体铸件和镶块间的相对收缩速率Ve是影响镶铸件是否产生热裂的主要原因。数值模拟和实验验证结果表明，用溢流法加热镶块的方法生产双金属镶铸件是合适的，它可以减少和消除镶铸件内的热裂。
The numerical simulation and experimental study on thermal cracking of steel castings with high chromium cast iron were carried out. The numerical simulation was carried out by enlarging the liquid metal thermal conductivity and assuming that the molten metal around the inserts remained unchanged at the pouring temperature. The impact of the field. It is pointed out that the relative shrinkage rate Ve between the body castings and the inserts in the insert casting process is the main reason that affects the hot-cracking of the castings. The results of numerical simulation and experimental verification show that it is suitable to produce bimetal castings by the method of heating the inserts with overflow method, which can reduce and eliminate the thermal cracking in the castings.