(1. 蘇州有色金屬加工研究院 材料科學(xué)與工程研究所，蘇州 215026；
2. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 對Cu-Cr-Zr系合金非真空熔煉過程進(jìn)行熱力學(xué)分析，分別計(jì)算Cu、Cr和Zr等合金組元與爐氣、坩堝、爐襯和爐渣反應(yīng)的吉布斯自由能變化，分析合金熔煉過程中相關(guān)反應(yīng)的可能性，并對部分分析結(jié)果進(jìn)行實(shí)驗(yàn)驗(yàn)證。結(jié)果表明，在熔煉溫度下，爐氣中微量氧氣和氮?dú)舛寄芘c合金組元中的鉻和鋯發(fā)生化學(xué)反應(yīng)而使其燒損；金屬氧化物ZrO2和MgO等對于鉻和鋯具有良好的化學(xué)穩(wěn)定性，可以作為熔煉Cu-Cr-Zr系合金的坩堝和爐襯材料。
關(guān)鍵字: Cu-Cr-Zr系合金；非真空熔煉；熱力學(xué)
（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
