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利用“固体与分子经验电子理论”（ＥＥＴ）分析了高Ｃｏ－Ｎｉ二次硬化马氏体钢中几种主要合金元素在不同状态下的价电子结构，认为Ｃｏ、Ｎｉ在奥氏体中与Ｃ相互作用较强，它们能降低Ｃ的扩散能力，推迟马氏体相变。在马氏体回火过程中，Ｃｏ 和Ｎｉ溶入渗碳体形成的合金渗碳体，在较高的温度下分解，使固溶于基体中的Ｍｏ 与位错充分结合。在渗碳体分解后，Ｍｏ 与Ｃ形成富Ｃ、Ｍｏ的溶质簇，或以Ｍ２Ｃ的形式析出，在基体内弥散分布，形成二次硬化。
The electronic structure of several main alloying elements in high Co-Ni secondary-hardened martensitic steel under different states was analyzed using the “EET” theory of solid and molecule theory. It is believed that the co-substitution of Co and Ni in austenite C interaction stronger, they can reduce the proliferation of C, delayed martensitic transformation. During the martensite tempering, Co and Ni dissolve into the cementite formed by cementite and decompose at higher temperature, so that the Mo dissolved in the matrix is fully combined with the dislocation. After the cementite is decomposed, Mo and C form solute clusters rich in C and Mo, or precipitate in the form of M2C, and disperse in the matrix to form secondary hardening.