Valence electron structure of cementite phase and its interface and the tempering phenomenon  

作　　者：李志林 刘志林 刘伟东 

机构地区：[1]Beijing University of Chemical Technology,Beijing 100029,China [2]Department of Materials Science and Engineering,Liaoning Institute of Technology,Jinzhou 121001,China

出　　处：《Science China(Technological Sciences)》2002年第3期282-290,共9页中国科学（技术科学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Grant No 59631060).

摘　　要：Tempering is an important phenomenon in ferrous alloys. Most steels, especially alloying steels, are used after quenching and tempering. To design the composition of quenching and tempering steels, control the tempering process more effectively, improve the properties after tempering and realize the potentials of steels, the essence of tempering process and the properties of tempering products have to be understood. In this paper, the phase structure factors and interface conjunction factors of common alloying elements in cementite and its interface are calculated out. The relationships between these valence electron structure parameters and (i) the phenomena of martensite decomposition, (ii) transformation, gathering and growth of the carbides and (iii) the mechanical properties of tempering products are bult up. The nature of the effect of alloying elements on tempering process and properties of tempering products is uncovered on the level of valence electron structure. One new theoretical foundation for alloy design is provided.

关 键 词：VALENCE ELECTRON structure  tempering  cementite  interface  mechanical property. 

分 类 号：TG156[金属学及工艺—热处理]