A kind of preparation method of titanium-based composite structure material

Abstract

The invention relates to a preparation method of a titanium-based composite structural material, comprising the following steps: S1, powder selection: select titanium or titanium alloy powder with low oxygen content; S2, preparation of feeding or granulating powder: prepare titanium / titanium alloy powder Mixing with a binder containing a foaming agent to prepare feed or granulated powder; S3, forming: forming the feed or granulated powder by injection or pressing to obtain a green body; S4, degreasing: degreasing to obtain a porous structure through degreasing Billet; S5, sintering: sintering the degreased billet under vacuum conditions at 1000-1300°C to obtain a porous titanium body or titanium alloy body; S6, aluminum or aluminum alloy that melts the porous titanium body or titanium alloy body at about 450-700°C Soaking in the aluminum alloy liquid; S7, taking out and cooling and removing the excess aluminum or aluminum alloy layer on the surface to obtain a titanium-based aluminized or aluminum alloy composite structural material. The invention combines the powder injection molding and the aluminum immersion method to obtain the titanium-based aluminized or aluminum alloy composite structural material with the advantages of corrosion resistance, high temperature resistance, impact toughness, high biocompatibility, light weight and high thermal conductivity.

Description

technical field [0001] The invention relates to a preparation method of a titanium-based composite structural material. Background technique [0002] With the development of modern science and technology, especially the development of aerospace, aviation, automobile and other fields, higher requirements are put forward for the performance of materials, among which the requirements for lightweight and high-strength design are getting higher and higher in terms of material performance. [0003] As a light-weight, high-strength, wear-resistant and corrosion-resistant rare metal material, titanium alloys are mainly used in the aerospace field and high corrosion-resistant chemical fields, such as aircraft fuselage components, aircraft engine components, etc., but too high The cost limits its large-scale application. Aluminum alloy has the advantages of light weight, good electrical and thermal conductivity, and low price. It has been widely used in aerospace, shipbuilding, trans...

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Problems solved by technology

[0003] As a light-weight, high-strength, wear-resistant and corrosion-resistant rare metal material, titanium alloys are mainly used in the aerospace field and high corrosion-resistant chemical fields, such as aircraft fuselage components, aircraft engine components, etc., but the high The cost limits its large-scale application

Aluminum alloy has the advantages of light weight, good electrical and thermal conductivity, and low price. It has been widely used in aerospace, shipbuilding, transportation and other fields, but its performance deteriorates in high temperature and corrosive environments, and its impact resistance is poor.

Most single metal and alloy materials cannot meet the design requirements of lightweight and high strength at the same time

[0004] In recent years, the preparation methods of titanium-aluminum dissimilar metal composite materials have become research hotspots at home and abroad, including explosive welding, casting, composite rolling, plasma sintering, welding, ultrasonic consolidation and other methods, but the two materials have relatively large thermophysical Differences increase the difficulty of compounding, resulting in certain limitations of these methods

For example, there is the problem of interface oxidation in composite rolling; the operation of explosive welding is dangerous, and the defects of welded joints are relatively large; ultrasonic consolidation can only composite materials with small thickness and low strength, and the casting precision is difficult to control, etc.

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