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Preparation method of titanium/aluminum bimetal composite material with curved surface self-forming characteristic

A composite material and forming feature technology, which is applied in the field of titanium/aluminum bimetallic composite materials and preparation, can solve the problems of increasing the difficulty of secondary machining, and achieve the effect of avoiding secondary machining, ingenious principle and good mechanical properties

Active Publication Date: 2021-06-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current preparation technologies of Ti / Al composites inevitably generate Ti at the Ti / Al heterointerface. 3 Al, TiAl, TiAl 3 A series of hard and brittle intermetallic compounds
These intermediate phases are easy to become the source of cracks in the subsequent deformation process, which increases the difficulty of its secondary machining

Method used

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  • Preparation method of titanium/aluminum bimetal composite material with curved surface self-forming characteristic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of the titanium / aluminum bimetallic composite material with curved surface self-forming features described in this embodiment is carried out in the following steps:

[0020] Step 1: Prepare a TC4 titanium alloy sheet with a size of 0.3 (thickness) × 10 (width) × 80 mm (length) and a 2A12 aluminum alloy sheet with a size of 0.3 (thickness) × 10 (width) × 80 mm;

[0021] Step 2: Use 200#, 400#, 600#, 800#, 1000#, 1500# water-grinding sandpaper to polish the surface of the titanium alloy sheet and aluminum alloy sheet in step 1, respectively, and then use 0.5μm oxidized Aluminum polishing agent is used for surface polishing, and finally ultrasonic cleaning is performed with acetone and alcohol for 10 minutes, and dried for later use.

[0022] Step 3: Put the surface-treated titanium and aluminum sheets on top of each other and put them into a vacuum hot-pressing furnace, keeping the vacuum degree in the furnace at 3×10 -3 Pa, heat from room temperat...

Embodiment 2

[0025] The preparation method of the titanium / aluminum bimetallic composite material with curved surface self-forming features described in this embodiment is carried out in the following steps:

[0026] Step 1: Prepare a TC4 titanium alloy sheet with a size of 0.3 (thickness) × 10 (width) × 80 (length) mm and a 2A12 aluminum alloy sheet with a size of 0.5 (thickness) × 10 (width) × 80 (length) mm;

[0027] Step 2: Use 200#, 400#, 600#, 800#, 1000#, 1500# water-grinding sandpaper to polish the surface of the titanium alloy sheet and aluminum alloy sheet in step 1, respectively, and then use 0.5μm oxidized Aluminum polishing agent is used for surface polishing, and finally ultrasonic cleaning is performed with acetone and alcohol for 10 minutes, and dried for later use.

[0028] Step 3: Put the surface-treated titanium and aluminum sheets on top of each other and put them into a vacuum hot-pressing furnace, keeping the vacuum degree in the furnace at 3×10 -3 Pa, heat from room...

Embodiment 3

[0031] The preparation method of the titanium / aluminum bimetallic composite material with curved surface self-forming features described in this embodiment is carried out in the following steps:

[0032] Step 1: Prepare a TC4 titanium alloy sheet with a size of 0.3 (thickness) × 10 (width) × 300 mm and a 2A12 aluminum alloy sheet with a size of 0.3 (thickness) × 10 (width) × 300 (length) mm;

[0033] Step 2: Use 200#, 400#, 600#, 800#, 1000#, 1500# water-grinding sandpaper to polish the surface of the titanium alloy sheet and aluminum alloy sheet in step 1, respectively, and then use 0.5μm oxidized Aluminum polishing agent is used for surface polishing, and finally ultrasonic cleaning is performed with acetone and alcohol for 10 minutes, and dried for later use.

[0034] Step 3: Put the surface-treated titanium and aluminum sheets on top of each other and put them into a vacuum hot-pressing furnace, keeping the vacuum degree in the furnace at 3×10 -3 Pa, heat from room temper...

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Abstract

The invention relates to a titanium / aluminum bimetal composite material with a curved surface self-forming characteristic and a preparation method thereof, and aims to provide a solution for curved surface processing of the titanium / aluminum bimetal composite material and skillfully utilize the physical property difference (i.e., the obvious difference of linear expansion coefficients) between titanium and aluminum materials. Bending internal stress is formed in the cooling process after titanium / aluminum is subjected to thermal field compounding, the titanium / aluminum is induced to spontaneously form the structural characteristic of bending towards the aluminum side, and secondary machining of a thin plate is avoided. The bending degree of the titanium / aluminum bimetal composite material is controlled by regulating and controlling the sizes (length * width * thickness) of titanium and aluminum substrates. The invention provides a new thought for designing and manufacturing the thin-plate-shaped heterogeneous composite material with the curved surface structure characteristic.

Description

technical field [0001] The invention relates to a bimetal thin plate with a curved surface feature, in particular to a titanium / aluminum bimetal composite material with a curved surface self-forming feature and a preparation method. Background technique [0002] Both titanium and aluminum are typical lightweight metals widely used in the aerospace field. The effective combination of two heterogeneous materials to form a titanium / aluminum composite material can achieve a high level of specific strength, structural weight, fatigue performance, and economical efficiency. A fine balance, which is an advantage that no single metal can match. However, the current preparation technologies of Ti / Al composites inevitably generate Ti at the Ti / Al heterointerface. 3 Al, TiAl, TiAl 3 A series of hard and brittle intermetallic compounds. These intermediate phases are easy to become crack sources in the subsequent deformation process, which increases the difficulty of its secondary mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/00B32B15/20B32B1/00B32B7/027B32B37/06B32B37/10B32B38/18
CPCB32B15/01B32B15/00B32B15/20B32B1/00B32B7/027B32B37/06B32B37/10B32B38/1858
Inventor 马运柱伍镭刘文胜刘超王涛颜焕元杨伦游任轩
Owner CENT SOUTH UNIV