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为获得Ｄ型石墨而熔制以钛和稀土合金为主的中间合金，其熔点、密度适中，被铁水吸收良好。可在冲天炉、电炉熔炼条件下稳定地获得Ｄ型石墨铸铁。
In order to obtain D-type graphite and melting of titanium and rare earth alloy-based master alloy, its melting point, density, moderate absorption by the hot metal. D-type graphite cast iron can be stably obtained under cupola and electric furnace smelting conditions.