A new type of Y-base heavy rare earth modificator was developed.
研制了一种钇基重稀土变质剂。
The result showed that titanate modificator is better than siloxane and PVA (polyvinyl alcohol).
实验表明，钛酸酯的表面修饰效果优于聚乙烯醇和硅氧烷。
The experiment results showed the structure was refined and the properties were enhanced after adding modificator, such as rare-earth ferrosilicon.
采用稀土硅铁、低碳铬铁和复合变质剂对中铬铸铁进行变质处理后，组织细化、性能提高；
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