【摘要】 本文从"扩散与偏聚"两个方面,在材料价电子结构的深度上揭示了原子状态、原子键力对Fe-C-Si合金系贝氏体形态及其性能的影响。文中应用"余氏理论"对Fe-C-Si合金系的奥氏体结构进行了"键距差分析",并结合"固溶体微观不均匀性理论"提出了"Fe-C-Si合金奥氏体中存在着C-Si偏聚区,C-si偏聚对贝氏体相变有阻力,这种阻力和相变驱动力交互作用可改变贝氏体的典型结构、形态和性能"的观点,从而完成了对Fe-C-Si合金系贝氏体变态及力学性能提高原因的初步研究。术文还介绍了C-Si偏聚的理论计算和实验测定。更多还原

【Abstract】 In terms of both diffusion and concentration, this paper deals with the influence of atomic states and atomic bonds on bainitic morphologies and mechanical property of Fe-C-Si alloys at the level of material valence electron structure. Austenite structure was analysed from the BLD method of S.H. Yütheory and that there are concentration region of C-Si showed in consideration of solid solusion nonhomogeneous theory. This concentration region is a kind of resistance of bainite transformation. This resistance and transformation driving force can change the morphology and properties of bainite.更多还原