航空航天级AlV85中间合金制备热力学及动力学研究  

Thermodynamic analysis and reaction kinetic for the preparation of aerospacegrade AlV85 master alloy

作　　者：苑子凯 黄召阔 于继洋 滕艾均 常智 YUAN Zikai;HUANG Zhaokuo;YU Jiyang;TENG Aijun;CHANG Zhi(Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102211,China;Pangang Group Vanadium Titanium&Resources Co.,Ltd,Panzhihua 617000,China)

机构地区：[1]鞍钢集团北京研究院有限公司,北京102211 [2]攀钢集团钒钛资源股份有限公司,四川攀枝花617000

出　　处：《粉末冶金工业》2024年第1期37-43,共7页Powder Metallurgy Industry

基　　金：2023年鞍钢集团资助项目(2023BJB-02PG)。

摘　　要：根据热力学原理对铝热法制备AlV85中间合金过程进行了吉布斯自由能、绝热温度及热值的计算,使用差热分析法分析了合金生产过程,构建了使用不同粒度Al粉铝热法生产AlV85合金的动力学方程。使用铝热法生产AlV85中间合金能够自发进行并维持,其绝热燃烧温度为2327 K,热值4169 J/g;铝粉受热熔化后与固态的V_(2)O_(5)反应,置换出V并生成部分Al_(m)V_(n),在约1000 K的温度下部分V和Al_(m)V_(n)反应生成V基固溶体;铝粉粒度对反应过程及反应产物有较大影响;构建了不同粒度铝粉生产AlV85合金的动力学方程,粒度越小,活化能越低、指前因子越高。The Gibbs free energy,adiabatic temperature and calorific value of AlV85 master alloy prepared by alu-minothermal method were calculated according to the thermodynamie prineiples,the process was studied using differential thermal analysis,the kinetic equations of AlV85 alloy produced by the aluminothermal method with different sizes of Al powder were constructed.The reaction of AlV85 master alloy by the aluminothermal method can be carried out and maintained spontaneously,with adiabatic temperature of 2327 K and calorific value of 4169 J/mol.Al powder is melted first and reacts with solid V_(2)O_(5)to replace V and produce part of Al_(m)V_(n),then part of V and Al_(m)V_(n)react to form V solid solution at about 1000 K.The particle size of aluminum powder has a great influence on the reaction process and reaction products;The kinetic equations of AlV85 master alloy preparation with different particle sizes aluminum powder is constructed,the smaller the particle size,the lower the activation energy and the higher the frequency factor.

关 键 词：AlV85 中间合金 铝热法 热力学及动力学 差热分析 

分 类 号：TG146.21[一般工业技术—材料科学与工程] V252[金属学及工艺—金属材料]