Preparation method for X-type titanium alloy three-dimensional lattice sandwich structure

Abstract

The invention belongs to the titanium alloy structure forming technology and relates to a method for preparing an X-type titanium alloy three-dimensional lattice sandwich structure by superplastic forming / diffusion connection. An X-type titanium alloy three-dimensional lattice sandwich member is prepared by adopting the superplastic forming method; and the X-type titanium alloy three-dimensional lattice sandwich structure is prepared by adopting the superplastic forming / diffusion connection process for the first time, so that on one hand, formed parts, especially the X-type titanium alloy three-dimensional lattice sandwich structures with complex shapes can be accurately controlled in shape, and the technical difficult problem of low possibility of formation of an X-type titanium alloy three-dimensional lattice sandwich is solved at the same time. The structure prepared by adopting the superplastic forming / diffusion connection process is higher in bonding strength as the three-dimensional lattice sandwich is connected with upper and lower panels through the diffusion connection method.

Description

technical field [0001] The invention belongs to the forming technology of titanium alloy structure, and relates to a method for preparing an X-type titanium alloy three-dimensional lattice interlayer structure. Background technique [0002] The three-dimensional lattice structure of titanium alloy can be prepared by the following method, such as figure 1 As shown, firstly, the titanium wires are interlaced layer by layer at a certain angle, and then under high temperature conditions, a fixed pressure is applied, and the heat preservation and pressure are maintained for a certain period of time, so that the titanium alloy wires between different layers are mutually diffused and connected together, and then Brazing (TiCuNi-60, at 20°C min -1 The speed is raised to 550°C, and the temperature is kept for 5 minutes, and then the temperature is raised to 975°C, and the vacuum degree is 10 -7 Under Torr conditions, heat preservation for 30min), the panel and the lattice structure...

AI Technical Summary

Problems solved by technology

[0006] (1) The three-dimensional lattice structure of metal wire prepared by the diffusion connection method has a small spacing between layers and a small adjustable range. Generally, it can only have the diameter of a titanium alloy wire, and the designability is poor;

[0007] (2) The metal wires between different layers are connected together by the method of diffusion connection. During the diffusion connection process, the overall structure will be under pressure, resulting in a decrease in the height of the structure, and the required structure height is obtained, which has a certain the difficulty;

[0008] (3) For metal wires with small diameters, the metal wires are easy to bend during diffusion connection and need to be fixed with stainless steel nails;

[0009] (4) When preparing a metal lattice structure with a complex surface, it is necessary to bend the metal wire and perform diffusion connection, which is difficult to control;

[0010] (5) High cost

Electron beam rapid prototyping requires special electron beam and laser equipment to form lattice structures, and the cost is relatively high;

[0011] (6) The part structure after electron beam and laser rapid prototyping is cast structure, and the performance of the material is low;

[0012] (7) The surface roughness of the upper and lower panels after electron beam and laser rapid prototyping is relatively high, and subsequent processing is required;

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