铝热还原——电磁铸造法制备铜铬合金触头材料的基础研究

The characters of CuCr contact is dependent of its process.It is a new method that CuCr alloy were made from oxides of Cu and Cr by thermit with a stage of electromagnet casting. Of course, it is nessery to study the basic theory of the process to make CuCr alloy commercily in the method.The progress in CuCr alloy as a contact material was analysized . The viscosities of Al2O3-CaO and Al2O3-CaO-MgO systems were measured by ZC-1600, the model of estimation viscosity of the systems was built and is able to describe the experimental results. The thermit dynamics of Al-CuO、Al-Cr2O3和Al-CuO-Cr2O3 were studied by DTA technigue. The experimental equipment of electromagnet casting was built of NdFeB magnet and the solidification of CuCr melt made by thermit were studied in the quipment, the microconstructure of CuCr alloy was improved. The CuCr ingots of φ70 were gained and the each of them was 3㎏ or so.

根据由氧化物直接制备CuCr合金触头材料的新思路，研究铝热还原法获得CuCr合金高温熔体的过程，CuCr熔体的电磁净化过程；结合快冷技术和结构分析技术研究CuCr合金熔体与电磁场的交互作用及对凝固机制的影响，研究CuCr合金熔体在凝固过程的缺陷、偏析、晶粒细化的基本规律；利用计算机模拟分析技术分析反应装置的传热、电磁搅拌特性。为铝热还原——电磁铸造法制备铜铬合金触头材料提供科学和实验依据，形成我国