Explosion-proof method and device for self-propagating production of kilogram-level γ-tialnb alloy in one-step furnace

Abstract

An explosion-proof method and device for producing kilogram-level γ-TiAlNb alloys by self-propagation in a one-step furnace. The explosion-proof method is that when the raw materials are heated in the heating zone until the self-propagating critical reaction occurs, according to the actual temperature on the upper surface of the reaction kettle and the ambient temperature in the heating zone , the bottom temperature of the reactor, the temperature difference between each other and the temperature rise rate are used as the judgment basis, and then enter the slow cooling zone for self-propagation, the deep cooling zone completely reacts, the heating zone replenishes heat, and the slow cooling zone is finally cooled to obtain kilogram-scale slag-coated γ ‑TiAlNb alloys. In the explosion-proof device adopted, the heating zone is used to provide the heat for initiating the self-propagating reaction of the γ‑TiAlNb alloy and the supplementary heat for the slag-gold separation process; the slow cooling zone is located below the heating zone and is used for the maintenance stage and the final In the stage of cooling to obtain the alloy, the cryogenic zone is located below the slow cooling zone, which is the main self-propagating reaction zone, which is used to take away the heat of reaction, limit the violent progress of self-propagation, play an explosion-proof role, and ensure the safety of alloy preparation and production equipment.

Description

technical field [0001] The invention belongs to the technical field of titanium-aluminum-niobium ternary alloy materials, and in particular relates to an explosion-proof method and device for producing kilogram-level gamma-TiAlNb alloys by self-propagation in a one-step furnace. Background technique [0002] As the "heart" of an aircraft, the engine's reliability and safety are very important, and it can represent an international technological level and comprehensive national strength. However, after the performance of aero-engines improves, the internal ambient temperature gradually increases, and the aircraft's thrust-to-weight ratio increases. , the nickel-based alloys usually used on aeroengine blades can no longer meet the actual needs. At present, the research frontier in the world is the γ-TiAl alloy material with low density, high specific strength, strong oxidation resistance and good creep performance at high temperature. However, due to its poor thermal processin...

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Problems solved by technology

This ratio of raw materials will generate excessive heat of reaction and lead to an inevitable explosive reaction. Therefore, it is limited to the laboratory preparation of gram-level TiAl alloys, and it is difficult to achieve kilogram-level production, let alone continuous automatic production.

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