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一、前言; 自一九六四年以来,新疆联合收割机厂用稀土镁韧性铸态球铁,生产了各种农业机械、汽车零件,积累了较多的生产和试验数据,使铸态韧性球铁的生产工艺,在生产实践中日趋完善,并扩大了使用范围。稀土镁韧性铸态球铁生产工艺的特点是:在严格控制化学成份的条件下,采用大剂量孕育,多次孕育,瞬时孕育等强化孕育的措施,使球铁在铸态条件下,就获得以铁素体为基体的金相组织;球铁在铸态条件下,具有较高的
First, the foreword; Since 1964, the Xinjiang combine harvester plant with rare earth magnesium ductile cast ductile iron, produced a variety of agricultural machinery, auto parts, accumulated more production and test data, the casting toughness Ductile iron production process, the production practice is increasingly perfect, and expanded the scope of use. Rare earth magnesium ductile cast iron ductile iron production process is characterized by: under strict control of chemical composition of the conditions, the use of high-dose inoculation, multiple inoculation, instant inoculation and other measures to strengthen the birth, the ductile iron in the as-cast conditions, access to Ferrite-based microstructure; ductile iron in the as-cast condition, with higher