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本文运用余瑞璜的“固体与分子经验电子理论”建立了Fe-C系、Fe-N系合金马氏体晶胞的价电子结构,研究了高氮高速钢中合金元素C、N、W、Mo、Cr、V对强度、韧性、红硬性和抗回火稳定性等各项性能的作用机制。研究结果表明:在高氮高速钢中形成了较Fe-C系合金马氏体具有更强键合力和对C、N原子扩散具有更高阻力的Fe-N系合金马氏体偏聚结构单元,增加了具有较强键合力偏聚结构单元的权重,同时N原子促进了合金元素W、Mo、Cr、V原子间的交互作用,并使合金马氏体中的共价电子对空间分布更为均衡,进而使高氮高速钢的各项性能均优于常用的高速钢。
In this paper, the valence electron structure of Fe-C and Fe-N alloy martensitic unit cell was established using “Solid and Molecular Empirical Electron Theory” by Yu Ruihuang. The effects of alloying elements C, N, W, Mo , Cr, V on the strength, toughness, red hardness and anti-tempering stability and other properties of the mechanism of action. The results show that Fe-N alloy martensitic segregation structure unit with stronger bonding force than Fe-C alloy martensite and higher resistance to diffusion of C and N atoms are formed in high-nitrogen high-speed steel , Increasing the weight of the segregated structural unit with stronger bonding force. At the same time, the N atom promotes the interaction between the alloying elements W, Mo, Cr and V atoms and the space distribution of the covalent electrons in the alloy martensite is more For a balanced, thus enabling the performance of high-nitrogen high-speed steel are better than the commonly used high-speed steel.