Refractory castable for titanium-aluminum alloy smelting and preparation method thereof

Abstract

The invention relates to a refractory castable for titanium-aluminum alloy smelting and a preparation method thereof. According to the technical scheme, the preparation method comprises the followingsteps: taking 60-75wt% of titanium-containing calcium hexaluminate particles as aggregate, and taking 10-25wt% of titanium-containing calcium hexaluminate fine powder, 5-15wt% of alpha-Al2O3 micro powder and 3-8wt% of pure calcium aluminate cement as matrix materials; uniformly mixing the matrix materials, adding the uniformly mixed matrix materials into the aggregate, uniformly mixing, adding water accounting for 3-10wt% of the sum of the aggregate and the matrix materials, uniformly stirring, carrying out vibration molding, and curing at room temperature for 12-24 hours; and finally, carrying out heat preservation at 110-200 DEG C for 12-36 hours to obtain the refractory castable for titanium-aluminum alloy smelting. The cost is low, the process is simple, and the prepared refractory castable for titanium-aluminum alloy smelting has the characteristics of good thermal shock resistance, strong titanium-aluminum alloy melt resistance and small pollution to the titanium-aluminum alloy.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for smelting titanium-aluminum alloys. In particular, it relates to a refractory castable for smelting titanium-aluminum alloy and a preparation method thereof. Background technique [0002] Titanium-aluminum alloy has low density, high specific strength, high specific stiffness, good heat resistance, excellent high temperature creep resistance and good oxidation resistance. It is the material of choice for hypersonic aircraft and the next generation of advanced aero-engines. The focus of research in the field of high-quality superalloys. [0003] The preparation of titanium-aluminum alloy by vacuum induction melting technology can effectively eliminate composition segregation and lower energy consumption, which is an important way to achieve low-energy preparation of high-quality titanium-aluminum alloy. The refractory material is the melting vessel in the vacuum induction melting ...

AI Technical Summary

Problems solved by technology

However, there are still defects in the chemical stability of perovskite materials. After smelting, titanium-aluminum alloys will be polluted, resulting in high oxygen content.

[0005] From the perspective of the forming method of refractories for titanium-aluminum alloy smelting, the above-mentioned refractory materials for titanium-aluminum alloy smelting in the prior art are shaped products. These shaped products require large-scale molding equipment during the molding process, and the cost is relatively high. Complex process

However, there is no public report on refractory castable technology for titanium-aluminum alloy melting