我厂在中频感应电炉中采用酸性炉衬熔炼45号铸钢时,用1#稀土合金进行孕育处理后,获得了机械强度较高、低温性能及抗热变形能力均较好的铸钢件及铸钢精铸件。通过金相照片和实验数据,说明了在45号铸钢中加入 0．05~0．3%的稀土合金对铸钢综合性能的影响。并找到了稀土合金在钢中的最佳含量,即在45号铸钢中加入0．14~0．17%的 I plant in the intermediate frequency induction furnace smelting 45 steel with acid furnace lining, with 1 # rare earth alloy after inoculation, access to a higher mechanical strength, low temperature performance and resistance to thermal deformation are better cast steel and castings Steel casting. Through the metallographic photographs and experimental data, the effect of adding 0.05-0.3% rare earth alloy on the overall performance of cast steel in 45 # cast steel is illustrated. And found the best content of rare earth alloy in steel, that is, in the 45 cast steel by adding 0.14 ~ 0.17% of