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前言1973年初,作者利用重稀土精矿粉在实验室条件下熔炼成混合重稀土硅、铁钙合金,并且应用该合金处理成球墨铸铁。两年来的实践表明:目前采用的重稀土合金的冶炼工艺是可行的;重稀土球墨铸铁的处理工艺已渐趋稳定。
Preface In early 1973, the authors used heavy rare earth concentrate powder to melt into heavy rare earth-doped silicon and iron-calcium alloys under laboratory conditions and applied the alloy to ductile iron. Practice over the past two years shows that the current smelting process of heavy rare earth alloys is feasible; the treatment process of heavy rare earth ductile iron has gradually stabilized.