Method for preparing titanium-aluminum intermetallic compound based on electron beam twin-wire fuse in-situ additive

Abstract

The invention discloses a method for preparing a titanium-aluminum intermetallic compound based on an electron beam twin-wire fuse in-situ additive. The method comprises the steps of 1, early-stage preparation, 2, in-situ additive manufacturing and 3, additive component cooling. In the step 3, a titanium-aluminum intermetallic compound component of the in-situ additive is placed in a vacuum environment for cooling until the titanium-aluminum intermetallic compound component is cooled to the room temperature. According to the method, a fuse wire additive mode is adopted, so that the integratedforming of materials is achieved; and due to the fact that the machining efficiency is high, large components can be manufactured. According to the method, the problems that the TiAl intermetallic compound has poor room-temperature plasticity and cannot be used for preparing wire material are solved; and a double-wire feeding method is provided, so that the titanium-aluminum intermetallic compoundwith a specific component proportion is obtained by controlling the wire feeding speed. According to the method, the electron beam fuse wire additive is carried out in a vacuum environment, the highenergy density of the electron beam can achieve an obvious purification effect, and the influence of impurity elements on the material performance is avoided.

Description

technical field [0001] The invention relates to the technical field of preparation of titanium-aluminum intermetallic compounds, in particular to a method for preparing titanium-aluminum intermetallic compounds based on in-situ addition of electron beam double-filament fuses. Background technique [0002] As high-temperature structural materials, intermetallic compounds have broad application prospects in the field of aerospace, among which TiAl intermetallic compounds are characterized by their low density (3.3-4.2g / cm 3 ), high strength, excellent high temperature oxidation resistance, creep resistance and flame retardancy have attracted widespread attention. However, TiAl intermetallic compounds have low room temperature plasticity, poor thermal deformation ability, and difficult cutting, which limit their practical application. At present, the main forming methods are casting and high-temperature forging, but the process is complicated, the processing cost is high, and ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of titanium-aluminum intermetallic compound and its components, which is used to solve the shortcomings of difficult processing of titanium-aluminum intermetallic components, high preparation costs and difficulty in small batch production, and can be used for titanium-aluminum intermetallic compounds pre-test

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