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

A technology of intermetallic compounds and electron beams, which is applied in the direction of electron beam welding equipment, additive processing, metal processing equipment, etc., can solve the problems of difficult processing, difficult to achieve small batch production, high preparation cost, etc., and achieve good structure and morphology, High processing efficiency and obvious heat accumulation effect

Active Publication Date: 2020-12-29
NANJING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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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

Method used

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

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Embodiment 1

[0045] This embodiment is based on the electron beam twin-filament fuse in-situ additive preparation of titanium-aluminum intermetallic compounds, including the following steps:

[0046] (1) Preliminary preparation: place the aluminum wire and titanium wire on different wire feeders of the electron beam fused wire additive system, adjust the angle and height of the wire feed gun, and fix the titanium alloy substrate after sanding and ethanol cleaning on the electronic beam. Put the working platform on the working platform of the electron beam fused filament additive manufacturing system, and place the working platform in the vacuum chamber of the electron beam fused filament additive manufacturing system. When the vacuum degree reaches the working vacuum degree, use a small beam to preheat the substrate until the titanium alloy substrate appears red hot;

[0047] (2) In-situ material addition: After setting the wire feeding speed of aluminum wire and titanium wire, feed the wi...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/00B33Y30/00
CPCB23K15/0046B23K15/0033B23K15/0026B33Y30/00Y02P10/25
Inventor 徐俊强周琦孔见彭勇高显鹏郭顺杨子威王朋坤顾锁林万学明
Owner NANJING UNIV OF SCI & TECH
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