(1. 苏州有色金属加工研究院 材料科学与工程研究所，苏州 215026；
2. 中南大学 冶金科学与工程学院，长沙 410083)
摘 要: 对Cu-Cr-Zr系合金非真空熔炼过程进行热力学分析，分别计算Cu、Cr和Zr等合金组元与炉气、坩埚、炉衬和炉渣反应的吉布斯自由能变化，分析合金熔炼过程中相关反应的可能性，并对部分分析结果进行实验验证。结果表明，在熔炼温度下，炉气中微量氧气和氮气都能与合金组元中的铬和锆发生化学反应而使其烧损；金属氧化物ZrO2和MgO等对于铬和锆具有良好的化学稳定性，可以作为熔炼Cu-Cr-Zr系合金的坩埚和炉衬材料。
关键字: Cu-Cr-Zr系合金；非真空熔炼；热力学
（1. Institute of Materials Science and Engineering, Suzhou Institute for Nonferrous Metals Processing Technology, Suzhou 215026, China;
2. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The Gibbs free energy changes of reactions of copper, chromium and zirconium with some components such as O2, N2, crucible and furnace lining materials, were calculated at the melting temperature. The possibilities of the relevant reactions were analyzed by the Gibbs free energy changes. The results show that chromium and zirconium can react with O2 and N2 from protective atmosphere; the zirconia and magnesia have a good stability for Cr and Zr, therefore, they can be used as crucible and furnace lining materials for Cu-Cr-Zr alloy melting.
Key words: Cu-Cr-Zr alloy; non-vacuum melting; thermodynamics
