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对Mg、Ca共还原制备V-4Cr-4Ti合金粗品的反应过程进行了热力学分析,由化学反应的标准吉布斯自由能确定了反应的可行性以及Ti的易氧化性;利用FactSage软件进行了试验方案设计,计算得到了反应的绝热燃烧温度为2 657.86℃,渣系熔点约为2 100℃,单位热效应为3 499.4 J/g。验证试验结果表明:按FactSage软件的设计方案可制备出V含量为91.6%,Cr含量为3.57%,Ti含量为1.53%的V-4Cr-4Ti合金粗品,但因Ti的不均匀性和夹渣现象还需进一步精炼。
Thermodynamic analysis was carried out on the reaction process of the crude product of V-4Cr-4Ti alloy prepared by co-reduction of Mg and Ca. The feasibility of the reaction and the susceptibility to oxidation of Ti were confirmed by the Gibbs free energy of chemical reaction. Using FactSage software, Experimental design, the calculated adiabatic combustion temperature of the reaction is 2 657.86 ℃, the melting point of the slag system is about 2 100 ℃, and the unit heat effect is 3 499.4 J / g. The results of the verification test show that the V-4Cr-4Ti crude with V content of 91.6%, Cr content of 3.57% and Ti content of 1.53% can be prepared according to the design of FactSage software. However, due to the inhomogeneity of Ti and slag inclusion Phenomena need to be further refined.