铝热还原电渣精炼法制备铜铬合金触头材料的组织调控的研究

项目名称： 铝热还原电渣精炼法制备铜铬合金触头材料的组织调控的研究

项目编号： No.51304043

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 王聪

作者单位： 东北大学

项目金额： 25万元

中文摘要： CuCr难混溶合金性能的好坏取决于第二相在基体中均匀弥散分布、无宏观偏析，而第二相的控制又取决适宜的制备方法。本课题提出的铝热还原-电渣精炼新方法，针对自蔓延熔铸法的铜铬合金成分不稳定、第二相粗化偏析等，通过在电渣精炼过程调整合金成分和控制冷却条件实现对铜铬合金组成和组织的调控。课题应用铝热还原的非平衡物理化学理论、现代物质结构理论和现代检测手段，系统研究铝热还原-电磁铸造的铜铬合金 成分组成及分布，夹杂物形貌及其分布规律；电渣精炼过程中CuCr合金添加组元通过改变合金熔体内温度场和流场等传输特性影响第二相析出及粗化过程；合金熔体与夹杂物、结晶器壁与熔体的润湿性对液-液形核过程的影响；电渣重熔过程冷却速率对CuCr合金从高温熔融状态冷却过程中基体组织与第二相形核及其长大过程的调控机理，凝固组织形成等科学问题，从而为制备铝热还原-电渣精炼高品质CuCr合金中提供理论和实验依据。

中文关键词： CuCr合金；铝热还原-电磁铸造法；缺陷；；

英文摘要： The quality of CuCr alloy depends on the uniformity of the second phase dispersed in the matrix and without macrosegregation, and the regulation of the second phase depends on the preparation method. Aluminum thermal reduction - electroslag refining new methods rose in the present subject, aiming at the instability of the alloy composition and the coarsening and segregation of the second phase of CuCr alloy prepared by aluminum thermal reduction, regulation of composition and organization of copper-chromium alloy will be implemented by adjusting the alloy composition and control of the cooling conditions in ESR process. Using non-equilibrium physical and chemical theory of aluminothermic reduction, the modern theory of the structure of matter and modern detection methods, the present subject will make systematic researches on a series of scientific issues such as composition distribution and morphology and its distribution pattern of inclusions in CuCr alloy prepared by aluminum thermal reduction-electromagnetic casting; regulation mechanism of the cooling rate in ESR process on the CuCr alloy matrix organization and the second phase nucleation and growth process during the cooling process from the high-temperature molten state; formation of solidified structure. Thue, this research provides the scientific theor

英文关键词： CuCr alloy；Alumino-thermic reduction electronmagnetic casting；Defects；；