Fe-Mn(Cr)-C系合金马氏体的价电子结构分析

Analysis on Valence Electron Structure of Alloying Martensite for Fe Mn(Cr) C

从奥氏体中原子分布和八面体的原子组态两个方面证明了晶胞类型的多样性，在Ｆｅ－Ｍｎ（Ｃｒ）－Ｃ奥氏体中，含１个Ｍｎ（Ｃｒ）原子晶胞的存在概率最大；建立了Ｆｅ－１２Ｃｒ－１．０Ｃ和Ｆｅ－１０Ｍｎ－１．０Ｃ马氏体的价电子结构。在含Ｃ－Ｍｎ（Ｃｒ）晶胞中，Ｃ－Ｍｎ（Ｃｒ）键最强，且其共价电子对数超过相应成分奥氏体中的共价电子对数。

The variety of crystal cell in austenite is indicated based on atomic configuration and octahedron structure. The cell with one Mn(Cr) atom is most propable for austenite in Fe Mn(Cr) C. The valence electron structures of martensite in Fe 12 Cr 1.0 C and Fe 10 Mn 1.0 C are determined. The C Mn(Cr) bond is the strongest in crystal cell containing C Mn(Cr) and the number of covalent electron couple in martensite is larger than that in austenite with identical composition.