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本文介绍了灰铸铁材料金相组织的基本构成要素,灰铸铁金相结构中的石墨形态和大小决定了灰铸铁的力学性能大小,而非基体组织。具有相同化学成分的灰铸铁件具有不同的力学性能,这和铸件的断面敏感性有关。灰铸铁的高强度是通过良好的孕育处理以改善石墨形态和大小获得的,而不是通过添加合金元素来实现。灰铸铁的热处理,并不是提高性能的最好方式,因为石墨形态决定了灰铸铁的性能,通过热处理使基体的任何变化带来性能的改进是有限的。
This paper introduces the basic components of the gray cast iron material microstructure, gray cast iron metallographic structure of the graphite shape and size determines the mechanical properties of gray iron size, rather than the matrix structure. Gray cast iron with the same chemical composition has different mechanical properties, which is related to the cross-sectional sensitivity of the castings. The high strength of gray cast iron is obtained through good inoculation to improve the morphology and size of the graphite, rather than adding alloying elements. Heat treatment of gray cast iron is not the best way to improve performance because graphite morphology determines the performance of gray cast iron and any improvement in performance resulting from any change in substrate through heat treatment is limited.