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A preparation method of titanium/aluminum bimetallic composite material with curved surface self-forming characteristics

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 effects of avoiding secondary machining, simple process, and good mechanical properties

Active Publication Date: 2022-05-24
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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  • A preparation method of titanium/aluminum bimetallic composite material with curved surface self-forming characteristics

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of the surface self-forming feature of the present embodiment of the titanium / aluminum bimetallic composite is carried out in accordance with the following steps:

[0020] Step 1: Prepare TC4 titanium alloy sheets with dimensions of 0.3 (thickness) ×10 (width) ×80mm (length) and 0.3 (thickness) ×10 (width) ×80mm aluminum alloy sheets;

[0021] Step 2: The surface of the titanium alloy sheet and the aluminum alloy sheet in step 1 is polished with 200#, 400#, 600#, 800#, 1000#, 1500# water sandpaper step by step, and then the surface polishing agent with a particle size of 0.5μm is used for surface polishing, and finally ultrasonically cleaned with acetone and alcohol for 10min, blown dry.

[0022] Step 3: After the surface treatment, the two sheets of titanium and aluminum are stacked up and down and closely fitted into the vacuum hot press furnace, and the vacuum degree in the furnace is maintained at 3×10 -3 Pa, heated from room temperature at 10 °...

Embodiment 2

[0025] The preparation method of the surface self-forming feature of the present embodiment of the titanium / aluminum bimetallic composite is carried out in accordance with the following steps:

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

[0027] Step 2: The surface of the titanium alloy sheet and the aluminum alloy sheet in step 1 is polished with 200#, 400#, 600#, 800#, 1000#, 1500# water sandpaper step by step, and then the surface polishing agent with a particle size of 0.5μm is used for surface polishing, and finally ultrasonically cleaned with acetone and alcohol for 10min, blown dry.

[0028]Step 3: After the surface treatment, the two sheets of titanium and aluminum are stacked up and down and closely fitted into the vacuum hot press furnace, and the vacuum degree in the furnace is maintained at 3×10 -3 Pa, heated from room t...

Embodiment 3

[0031] The preparation method of the surface self-forming feature of the present embodiment of the titanium / aluminum bimetallic composite is carried out in accordance with the following steps:

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

[0033] Step 2: The surface of the titanium alloy sheet and the aluminum alloy sheet in step 1 is polished with 200#, 400#, 600#, 800#, 1000#, 1500# water sandpaper step by step, and then the surface polishing agent with a particle size of 0.5μm is used for surface polishing, and finally ultrasonically cleaned with acetone and alcohol for 10min, blown dry.

[0034] Step 3: After the surface treatment, the two sheets of titanium and aluminum are stacked up and down and closely fitted into the vacuum hot press furnace, and the vacuum degree in the furnace is maintained at 3×10 -3 Pa, heated from room tempera...

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Abstract

The invention relates to a titanium / aluminum bimetallic composite material with curved surface self-forming characteristics and a preparation method thereof. The difference in physical properties between materials (that is, the significant difference in linear expansion coefficient), the bending internal stress is formed during the cooling process of titanium / aluminum after thermal field recombination, which induces its spontaneous formation of structural characteristics that bend toward the aluminum side, avoiding the Secondary processing of thin sheets. The bending degree of the titanium / aluminum bimetallic composite is controlled by adjusting the dimensions of the titanium and aluminum substrates (length×width×thickness). The invention provides a new idea for designing and manufacturing thin plate-like heterogeneous composite materials with curved surface structure features.

Description

Technical field [0001] The present invention relates to a bimetallic sheet having curved features, specifically to a surface self-forming feature of titanium / aluminum bimetallic composite material and preparation method. Background [0002] Titanium and aluminum are typical lightweight metals with wide applications in the aerospace field, and the effective combination of two heterogeneous materials to form titanium / aluminum composite materials can achieve a good balance in the specific strength, structural weight, fatigue performance and economy of the material, which is an advantage that a single metal cannot match. However, current titanium / aluminum composite preparation techniques inevitably generate Ti at the Ti / Al heterogeneous interface 3 Al、TiAl、TiAl 3 and a series of hard and brittle intermetallic compounds. These intermediate phases tend to become crack sources during subsequent deformation processing, increasing the difficulty of secondary machining. For titanium / alum...

Claims

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Application Information

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Patent Type & Authority Patents(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
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