【摘要】 运用“固体与分子经验价电子理论”建立了Fe -C系贝氏体晶胞的价电子结构 ,研究了贝氏体钢中Mn、Si、B以及Re对强度和韧度的作用机制。结果表明 ,在贝氏体钢中形成的较Fe -C贝氏体具有更强键合力和对C原子扩散具有更大阻力的C -Mn偏聚结构单元 ,增加了具有较强键合力偏聚结构单元的权重 ,同时微量元素的溶入促进了合金元素之间的交互作用 ,并使合金贝氏体的共价电子对空间分布更加均衡 ,从而使贝氏体钢的强度和韧度更为优越更多还原

【Abstract】 Based on YU’s "empirical electron theory of solids and molecule",this paper sets up the valence electron structure of bainitic crystal cells in Fe-C alloys and analyses the effect of alloying elements Mn,Si,B and Re etc,on strength and toughness in bainitic steels.It shows that there are segregation structure units of C-Mn in the alloying bainitic steels which have higher bond strenghth and more hamper on the diffusion of carbon than Fe-C alloys,while the addition of small amount of B,Re enhances the reciprocal effect among alloy elements and make the distribution of valence electro couple balanced,then make the stength and the toughness of bainitic steels are more superior.更多还原