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本文研究了稀土复合变质处理对改善ＺＧ３５ＣｒＭｏ铸钢的组织与性能的影响。试验结果表明，在ＺＧ３５ＣｒＭｏ铸钢中加入适量的ＲＥ－Ｃａ，可使钢的铸态一次晶细化，魏氏组织基本消除；铁素体沿晶界网状分布得以改善，非金属夹杂由多角状聚集分布变为近似圆球状的弥散均匀分布，从而使钢具有较高的综合机械性能，并克服了一般铸造低合金钢热裂倾向大的缺点，使这种钢的铸造性能优于普通碳素钢，除用于砂模铸造外，还可用于铁模铸造。此外研究还表明，对铸造低合金钢采用稀土复合处理，比单独采用稀土处理能获得更明显的效果。
In this paper, the effect of rare earth compound modification on the microstructure and properties of ZG35CrMo cast steel was studied. The results show that the addition of proper amount of RE-Ca to ZG35CrMo cast steel can make the as-cast austenite grain refinement and eliminate Widman’s structure; the distribution of ferrite along grain boundaries can be improved, Shaped aggregate distribution into an approximately spherical uniform dispersion, so that the steel has a high overall mechanical properties, and overcome the general casting of low-alloy steel hot cracking tendency of the shortcomings of the casting of this steel is superior to ordinary carbon Steel, except for sand casting, but also for iron casting. In addition, the study also shows that the use of rare earth composite cast low-alloy steel casting process, than the use of rare earth treatment can get more significant results.