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本文叙述在1500℃温度下,用稀土镁球化处理酸性冲天炉熔化、工频电炉提温未脱硫的铁水,生产东风_4内燃机车、C62A敞车上的QT42-10、QT50-5球铁铸件的可行性和生产实践。采用该种工艺能消除球墨铸铁件的皮下气孔、夹渣等缺陷,提高铸件质量;直接处理未脱硫的铁水,节省了常规生产时的脱硫费用;采用冲天炉-工频炉双炼工艺,可提高生产能力,获得经济效益。
This paper describes the temperature at 1500 ℃, with rare earth magnesium balling acidity cupola melting, power frequency electric furnace temperature is not desulfurization of hot metal production Dongfeng _4 diesel locomotive, C62A gondola QT42-10, QT50-5 ductile iron castings Feasibility and production practices. The use of such technology can eliminate ductile iron subcutaneous porosity, slag and other defects to improve the quality of castings; direct treatment of non-desulfurization of hot metal, saving the cost of conventional production desulfurization; the use of cupola - furnace frequency furnace technology can be Improve production capacity, access to economic benefits.