研究了稀土、铌、钒、钛等元素对低合金铸钢组织和性能的影响。结果表明，强碳化物形成元素（铌、钒、钛等）可细化晶粒和沉淀强化，显著提高铸钢强度；稀土则可细化晶粒并改善非金属夹杂物的形态和分布，显著提高钢的韧性。这些合金元素复合处理铸钢，则可获得显著的强韧化效果 The effects of rare earth, niobium, vanadium and titanium on the microstructure and properties of low alloyed cast steel were studied. The results show that the formation of strong carbides (niobium, vanadium, titanium, etc.) can refine grains and precipitation strengthening, significantly improve the strength of cast steel; rare earth can refine grains and improve the morphology and distribution of non-metallic inclusions, significant Improve the toughness of steel. These alloying elements composite cast steel, you can get significant toughening effect