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根据球铁中石墨／基体（Ｇ／ｍ）界面微观力学行为以及球状裂纹扩展微观过程研究的结果。设计了以球墨外包的马氏体球壳（Ｍｓｈ）和铁素体＋块状马氏体（Ｆ＋Ｍｍ）的双相基体，即Ｇ＋Ｍｓｈ＋Ｆ＋Ｍｍ的优化球铁组织（Ｍｏｐ）；从球铁中Ｆ＋Ｍ形成的相变机理、热力学及动力学分析，提出实现Ｍｏｐ的热处理；性能测试结果证实Ｍｏｐ球铁具有优越的宏观机械性能．
According to the micro-mechanical behavior of graphite / matrix (G / m) interface in ductile iron and the microscopic process of spherical crack propagation, The optimized ductile iron matrix (Mop) of Msh and ferrite + massive martensite (F + Mm) with G + Msh + F + Mm was designed. Phase transition mechanism, thermodynamics and kinetic analysis, and proposed to achieve Mop heat treatment; performance test results confirm Mop ductile iron has superior macroscopic mechanical properties.