项目名称： 复杂耐磨黄铜硬质相形成机理及相稳定机制研究

项目编号： No.51501028

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 接金川

作者单位： 大连理工大学

项目金额： 20万元

中文摘要： 复杂耐磨黄铜是铜合金中对添加元素利用最充分的合金品种之一，代表了黄铜系列机械性能的最高水准，在汽车、航空及航海工业中有着广泛应用。目前我国复杂黄铜耐磨性较国外差距很大，其主要原因就是合金组织形成机理及调控机制不清晰，尤其是作为承担耐磨功能的硬质相，其形成热力学、生长动力学及磨损过程中的相稳定机制均不清晰。鉴于此，本项目拟以复杂耐磨锰黄铜中的Mn-Si及Fe-Si硬质相为研究对象，研究其稳定存在的温度区间，通过高能射线同步辐射技术揭示硬质相的生长动力学，进而通过施加电磁场主动控制其分布及形貌；分析固态相变条件下硬质相形成的热力学条件及动力学机制，揭示硬质相在不同磨损条件下的相稳定机制。在阐明硬质相形成机理及磨损服役条件下相稳定性机制的基础上，获得最佳耐磨性所对应的硬质相形貌分布及控制手段。研究成果对于进一步理解/完善金属材料合金组织形成及调控机制，制备高品质复杂耐磨黄铜具有重要意义。

中文关键词： 复杂黄铜；硬质相；形成机理；同步辐射；电磁场

英文摘要： Complex high-strength wear-resistance brasses are the one of the alloys which make best uses of the addition of elements, and represent for the highest level of brasses. They are widely used in the automobile, aviation and navigation industry. At present, the complex wear-resistance brasses prepared in our country are far below the level of the developed countries, which can be mainly ascribed to the indisinction of formation and control mechanism of microstructure. Hence, the project takes the Mn-Si and Fe-Si hard phase in the complex high-strength wear resistance brasses as the investigated object, to study their stably existed temperature range and effect of small amount of elements on their formation. The growth kinetics of hard phase will be revealed through the synchrotron radiation used high-energy ray, and then the morphology and distribution will be controlled and altered by using electromagnetic field during solidification process. The thermodynamic and kinetic mechanisms during solid transformation process will be analyzed, and the phase stability of hard phase under different wear process will be investigated. On the basis of formation mechanism and phase stability of hard phase, the optimized morphology and distribution and the corresponding control method will be obtained. The project has an important meaning to understand/improve the formation and control mechanisms of alloy microstructure, and is beneficial to prepare complex wear-resistance brass with high performance.

英文关键词： Complex brass;Hard phase;Formation mechanism;Synchrotron radiation;Electromagnetic field