Research on the Preparation Process of Niobium Aluminum Alloy for Titanium Alloy Production
The feasibility of different slag ratios,the effect of unit reaction heat on product yield,the effect of different raw materials on Fe and Si in the product,and the reasons and control methods for the presence of"high niobium phase"in the alloy were studied by aluminum thermal reduction method to prepare niobium aluminum alloy.The results show that using Al2O3-CaO slag system,when mole Al2O3/(Al2O3+CaO)=0.703,it is feasible in practice.The unit reaction heat is controlled between 3 200～3 400 kJ/kg,and the product yield is around 95％.By controlling the Si content in aluminum particles at 0.05％,Fe content in aluminum particles at 0.10％,and Si content in CaO within 0.40％,qualified niobium aluminum alloy products with Si and Fe content can be prepared.High-end niobium aluminum alloy products with uniform composition and no inclusions can be prepared by first using aluminum thermal reduction method and then vacuum induction melting method.
万方数据
维普
