在消失模形成铸件过程中,模型局部加入Ce,铸件成型后,Ce溶入了铸件表层。试验表明,稀土溶入钢中改变了铸件局部特性,提高了钢的硬度,增强了钢的冲击韧性。分析了稀土溶入铸件表层的力学性能及形成机理。 In the process of forming the lost foam die, the model adds Ce partially, after the casting is formed, Ce dissolves into the surface of the casting. Experiments show that the dissolution of rare earth into the steel changed the local characteristics of the castings, increased the hardness of the steel and enhanced the impact toughness of the steel. The mechanical properties and formation mechanism of rare earth into the casting surface were analyzed.