Preparation method of titanium-based composite structure material

A composite structure, titanium-based technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of thermophysical differences that increase the difficulty of compounding, difficulty in controlling casting precision, large defects in welded joints, etc., and achieve good deformation processing performance , Simplified production process, and high interface connection strength

Active Publication Date: 2021-07-27
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method of titanium-based composite structure material

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Embodiment 1

[0026] The present invention comprises the following steps:

[0027] S1. Select pure titanium with low oxygen content, the median particle size is 25 μm, and the oxygen content is 0.15%;

[0028] S2, mixing titanium powder with a binder with a foaming agent to prepare the feed; the binder is selected from polyoxymethylene, polyethylene, polypropylene; the foaming agent is selected from TiH2; wherein polyoxymethylene, polyethylene, polypropylene, The foaming agent accounts for 10%, 2%, 3%, and 2% of the weight of titanium powder respectively;

[0029] S3. Obtain the green body by injection molding; wherein the technical parameters are: mold temperature 120°C, material temperature 180°C, pressure 130MPa;

[0030] S4, carry out degreasing by atmosphere degreasing process, its technical parameter is: degreasing temperature is 600 ℃, and degreasing atmosphere is argon; figure 1 );

[0031] S5, sintering under a vacuum condition of 1100° C. to obtain a porous titanium body;

[0...

Embodiment 2

[0035] The present invention comprises the following steps:

[0036] S1. Select TC4 powder with low oxygen content, the median particle size is 50 μm, and the oxygen content is ≤0.2%;

[0037] S2, TC4 powder is mixed with the binding agent that has foaming agent to prepare granulated powder; Binding agent selects polyvinyl alcohol; Foaming agent selects ammonium chloride; Wherein polyvinyl alcohol and ammonium chloride account for TC4 powder weight respectively 3%, 2%;

[0038] S3. Obtain the green body by pressing and forming, wherein the technical parameters are: pressure 100MPa, room temperature, holding time 2s;

[0039] S4. Degreasing through the atmosphere degreasing process, the technical parameters are: the degreasing temperature is 200°C, and the degreasing atmosphere is argon; during the degreasing process, the binder is removed, and the foaming agent further fluffs the powder into a porous structure;

[0040] S5, sintering under a vacuum condition of 1250° C. to o...

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Abstract

The invention relates to a preparation method of a titanium-based composite structure material. The preparation method comprises the following steps of S1, conducting powder selection, specifically, selecting titanium or titanium alloy powder with low oxygen content; S2, preparing feed or granulation powder, specifically, mixing titanium / titanium alloy powder and a binder containing a foaming agent to prepare the feed or granulation powder; S3, conducting forming, specifically, forming the feed or the granulation powder through injection or pressing to obtain a blank; S4, conducting degreasing, specifically, obtaining a degreased blank with a porous structure through degreasing; S5, sintering, specifically, sintering the degreased blank under the vacuum condition of 1000-1300 DEG C to obtain a porous titanium body or titanium alloy body; S6, soaking the porous titanium body or titanium alloy body in aluminum or aluminum alloy liquid melted at the temperature of about 450-700 DEG C; and S7, taking out, cooling, and removing the redundant aluminum or aluminum alloy layer on the surface to obtain the titanium-based aluminized or aluminum alloy composite structure material. The titanium-based aluminized or aluminum alloy composite structure material with the advantages of corrosion resistance, high temperature resistance, impact toughness, high biocompatibility, light weight and high thermal conductivity is obtained by combining powder injection molding and an aluminum immersion method.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11B22F3/26B22F1/00
CPCB22F3/1125B22F3/26B22F1/10
Inventor 苏绍华吴勇军黄玉辉洪子健邬均文王明喜
Owner ZHEJIANG UNIV
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