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稀土镁球墨铸铁在生产过程中,铸型工艺对铸件质量有着直接的影响。而对球铁件的铸型工艺,目前国内还没有一套成熟的理论,要视具体零件而定。我厂自1955年以来,小批生产1750造纸机和2362造纸机烘干部球铁齿轮,毛重130—300公斤,属于中型铸件,年产量150件左右。刚开始生产时没有掌握球铁的凝固规律,废品率在80%
Rare earth magnesium nodular cast iron in the production process, the casting process has a direct impact on the quality of castings. The ductile iron casting process, at present there is no set of mature theory, depending on the specific parts. Since 1955, our factory has been producing 1750 paper machines and 2362 paper-making machine ductile iron gears with a gross weight of 130-300 kg, belonging to the medium-sized castings. The annual output is about 150 pieces. At the beginning of production did not grasp the law of the ductile iron coagulation, rejection rate of 80%