Electronic Theory Study Of The Role And Performance Of Wear-resistant Manganese Steel Alloy Elements

The effects of alloy elements on the matrix of austenitic manganese steel and its behavior of work hardening were studied in this thesis, establishing the relations of valence electron parameter and macro-property. Valence electron structure parameter of manganese steel with various contents were calculated by BLD in EET. It was placed emphases on the problems of strengthening effects of alloy elements and octahedral structure units on steel matrix, the poorness and richness of alloy elements, the martensitic transformation affected by alloy elements, the impact toughness influenced by uniformity of gradient distribution of valence electron structure. The model of structure unit distribution probability was established at the foundation of statistics andatomic interactions, meanwhile, a new parameter-structural unit distribution factorwas proposed. Valence electron structure parameter and structure unit distribution were studied with the changing of contents of C and Mn in manganese steel. Two parameters, martensitic transformation bond energetic factor and martensitic transformation bond strength factor, were proposed to discuss the stability of austenite and the transformation of martensite and establish relations between micro-structure and macro-property. The wear resistance of austenitic manganese steel was discussed at the level of valence electronic and atomic structure, providing theoretical base of designing ingredient of alloy.