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设计了稀土高铬白口铸铁磨球的化学成分、显微组织，测试了磨球的力学性能．采用稀土变质处理细化了组织，进一步提高了磨球的韧性及耐磨性．经工业装机试验，取得了令人满意的结果．
The chemical composition and microstructure of the rare earth high chromium white cast iron grinding ball were designed and the mechanical properties of the grinding ball were tested. The use of rare earth modification meticulous organization, to further improve the toughness and wear resistance of the ball. After the industrial installed test, and achieved satisfactory results.