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

A refractory castable, titanium-aluminum alloy technology, applied in the field of refractory materials for titanium-aluminum alloy smelting, can solve the problems of titanium-aluminum alloy pollution, complex process, high oxygen content, etc., achieve low production cost, simple overall process, and low preparation cost Effect

Active Publication Date: 2020-07-10
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 materia

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A refractory castable for smelting titanium-aluminum alloy and a preparation method thereof. With 60-64wt% titanium-containing calcium hexaaluminate particles as aggregate, 21-25wt% titanium-containing calcium hexaaluminate fine powder, 5-9wt% α-Al 2 o 3 Micropowder and 5-7wt% pure calcium aluminate cement are used as base materials. First mix the base material, then add the mixed base material into the aggregate, mix evenly, then add 3-7wt% of water accounting for the sum of the aggregate and the base material, and stir evenly , Vibration molding, curing at room temperature for 12-24 hours; finally, heat preservation at 110-160°C for 12-24 hours to obtain a refractory castable for titanium-aluminum alloy melting.

[0034] The refractory castable for smelting titanium-aluminum alloy prepared in this embodiment is tested: the service life is greater than 15 times; the thickness of the interface with the titanium-aluminum alloy is about 26-50 μm; the oxygen content of t...

Embodiment 2

[0036] A refractory castable for smelting titanium-aluminum alloy and a preparation method thereof. With 60-64wt% titanium-containing calcium hexaaluminate particles as aggregate, 21-25wt% titanium-containing calcium hexaaluminate fine powder, 5-9wt% α-Al 2 o 3 Micropowder and 5-7wt% pure calcium aluminate cement are used as base materials. First mix the base material, then add the mixed base material into the aggregate, mix evenly, then add 6-10wt% of water accounting for the sum of the aggregate and the base material, and stir evenly , vibration molding, curing at room temperature for 12 to 24 hours; finally, holding at 150 to 200°C for 24 to 36 hours to obtain a refractory castable for titanium-aluminum alloy melting.

[0037] The refractory castable for smelting titanium-aluminum alloy prepared in this embodiment is tested: the service life is greater than 15 times; the thickness of the interface with the titanium-aluminum alloy is about 26-49 μm; the oxygen content of t...

Embodiment 3

[0039] A refractory castable for smelting titanium-aluminum alloy and a preparation method thereof. With 63-67wt% titanium-containing calcium hexaaluminate particles as aggregate, 17-21wt% titanium-containing calcium hexaaluminate fine powder, 11-15wt% α-Al 2 o 3 Micropowder and 4-6 wt% pure calcium aluminate cement are used as base materials. First mix the base material, then add the mixed base material into the aggregate, mix evenly, then add 3-7wt% of water accounting for the sum of the aggregate and the base material, and stir evenly , Vibration molding, curing at room temperature for 12-24 hours; finally, heat preservation at 110-160°C for 12-24 hours to obtain a refractory castable for titanium-aluminum alloy melting.

[0040] The refractory castable for smelting titanium-aluminum alloy prepared in this embodiment is tested: the service life is greater than 16 times; the thickness of the interface with the titanium-aluminum alloy is about 20-43 μm; the oxygen content o...

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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 ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/44C04B35/63
CPCC04B35/66C04B35/44C04B35/6303C04B2235/3208C04B2235/3217
Inventor 付绿平顾华志黄奥张美杰
Owner WUHAN UNIV OF SCI & TECH
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