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一九二三年美国Meenan用白口或麻口成分的铁水加入少量物质(如CaSi、FeSi)进行变质处理,促使其石墨化而成为具有较高强度的灰铸铁,通常把这种灰铸铁称为孕育铸铁(又称密烘铸铁或变质铸铁)。铸铁孕育技术的出现,不仅使灰铸铁冲破了原来的强度限制,而且为控制铸铁的组织和性能提供了一种有效的方法。我国于五十年代初引进和研制了这种工艺。近几年来,我国又在这方面进行了许多工作。
In 1923, the United States Meenan white or stomatal composition of the molten iron by adding a small amount of material (such as CaSi, FeSi) for modification, to promote its graphitization and become a gray iron with higher strength, usually the gray iron To nurture cast iron (also known as bake cast iron or metamorphic cast iron). The emergence of cast iron inoculation technology not only broke the original strength limit of gray cast iron, but also provided an effective method for controlling the microstructure and properties of cast iron. China introduced and developed this kind of craft in the early 1950s. In recent years, our country has done a great deal of work in this regard.