Method for preparing AlCr2C material based on induction furnace melting

Abstract

The invention discloses a method for preparing an AlCr2C material based on induction furnace melting. According to the technical scheme, the method comprises the following steps: vacuumizing an induction furnace with an aluminum ingot to be 7*10<-2>Pa or below, and filling argon gas in the induction furnace until the pressure of the argon gas is an atmospheric pressure; melting the aluminum ingot in the induction furnace, continuing to heat to 800-1700 DEG C, adding chromium powder, melting the chromium powder, adding graphite powder, preserving heat for 2-30 minutes, finally cooling to 600-1000 DEG C, casting and cooling to prepare the AlCr2C material. The preparation process is conducted under the condition that the pressure of the argon gas is the atmospheric pressure; the chromium powder and the graphite powder are added according to a molar ratio of the aluminum ingot to the chromium powder to the graphite powder of 1 to 2 to 1; the preparation process is simple; and the prepared AlCr2C material is stable in chemical components, uniform in microscopic structures, good in hydration resistance, stable in high-temperature performance, excellent in corrosion resistance and good in thermal shock resistance.

Description

technical field [0001] The invention belongs to AlCr 2 C material technology field. Specifically relate to a kind of preparation AlCr based on induction furnace smelting 2 C material method. Background technique [0002] AlCr 2 C. Al 4 C 3 Isocarbides are a group of materials with very high melting points. The melting point (or sublimation) of many carbides is very high, and the oxidation resistance of carbides is poor. Generally, it starts to oxidize at red hot temperature, but most of them have stronger oxidation resistance than metals with high melting points, and better than graphite and carbon. . Most carbides have good electrical and thermal conductivity, and many carbides have high hardness, so carbides are widely used in industrial manufacturing. For example, it is used as an antioxidant in the preparation of carbon-containing refractory materials. [0003] The raw materials for making carbide products are all artificially synthesized, and there are three me...

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Problems solved by technology

[0008] Although the above synthesis methods have their own advantages, the disadvantages are that the method for preparing carbides is more complicated, the equipment investment is large and the cost is higher.

At the same time, due to the inevitable particle segregation during the mixing process, the microstructure of the prepared material is not uniform enough, which affects the stability of the chemical composition and properties of the material.

Furthermore, aluminum carbon materials such as Al 4 C 3 Although it has excellent high-temperature properties, it is very easy to hydrate, and the volume effect caused by hydration leads to damage to the material