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1 引言 铸态球铁是指不经专门热处理而在铸态下直接达到使用性能要求的球墨铸铁。铸态球铁与退火高韧性球铁或正火珠光体球铁相比有如下优点:(1)省去热处理工序,降低能耗,节约能源;(2)简化生产工序,缩短生产周期,提高劳动生产率;(3)节省热处理设备投资,缩短热处理和清理工时;(4)防止热处理时的氧化、脱碳和变形,降低废品率。铸态球铁的这些优点已引起铸造界的广泛重视,70年
1 Introduction As-cast ductile iron refers to ductile iron that reaches the required performance directly in the as-cast condition without special heat treatment. Compared with annealed ductile ductile iron or normalized pearlite ductile iron, as-cast ductile iron has the following advantages: (1) eliminating the heat treatment process, reducing energy consumption and saving energy; (2) simplifying the production process, shortening the production cycle and increasing Labor productivity; (3) saving investment in heat treatment equipment to shorten the heat treatment and cleaning work hours; (4) to prevent heat treatment, oxidation, decarburization and deformation, reduce scrap rate. These advantages cast cast ductile casting industry has caused widespread concern, 70 years