高速钢中W-Mo-Cr-V-Ti等合金元素形成硬质相的微观机制及性能调控

项目名称： 高速钢中W-Mo-Cr-V-Ti等合金元素形成硬质相的微观机制及性能调控

项目编号： No.51261013

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 蒋业华

作者单位： 昆明理工大学

项目金额： 52万元

中文摘要： 新型钢铁材料工业在20世纪高速发展，成为各国工业化的重要标志，超级钢研究计划或新一代钢铁材料研究备受关注，然而多元硬质相的基本物理化学力学性质难以获得，导致在整个世界范围内对钢铁中第二相形成的机理和性质缺乏全面深入的了解，从基础研究方面限制了新型钢铁材料的开发与研究。本项目以高强高韧高速钢中常见添加合金元素为例，深入探讨W-Mo-Cr-V-Ti等合金元素形成硬质相的机制，结合计算模拟及微结构表征技术，对其中硬质相的性质进行研究，包括稳定性、热力学、力学及物理化学性质等，结合第一原理计算从电子-原子层次上探索各类硬质相的形成机制、结构及力学性质规律，总结其电子结构和化学键合对力学行为影响的科学本质，通过深入了解硬质相的性质来调控硬质相的选择、工艺等，从而为新一代高速钢的设计和研究提供理论基础与支撑，具有重要的理论意义和工程应用价值。

中文关键词： 高速钢；硬质相；第一性原理；合金化；模拟

英文摘要： Iron and steel industry were developed quickly in last the century, which is a symbol for the modern industry. The super steel plan or new iron materials are coming to front. However, the fundamental properties like physical, chemistry, mechanical, thermodynamics, etc. of reinforcement are lacked in traditional research. In addition, the mechanisms of the effects and properties of steel by reinforcement are unknown in the current world. Owing to these reasons, the progress of iron and steel is similar to stop in discovery new materials. In this research, the common alloying elements included W, Mo, Cr, V and Ti, etc. in high-speed steel will be studied as an example. The mechanism of alloying would be explored by experiments and calculations. We will apply the XRD, SEM, TEM and simulation to characterize the structures and properties of reinforcements. The stability, thermodynamics, mechanical and thermal properties of carbides will be discussed deeply in our research. Then, the new rules among these properties with the compounds are going to be discovered by first principles. Hence, we would know the reasons which affect the properties in electron-atom level. Moreover, we could design the new iron and steel by the theory in this research.

英文关键词： high speed steel；reinforcement；first principle；alloying；simulation