Preparation method of superplastic aluminum-based composite material plate

An aluminum-based composite material and superplastic technology, which is applied in the field of aluminum-based composite material processing, can solve the problems of grain recovery and recrystallization growth, difficulty in large-scale production, and inability to be put into industrial applications.

Active Publication Date: 2021-05-07
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the aluminum alloy materials prepared by these methods have fine grains and good superplasticity, it is difficult to form large-scale production and cannot be put into industrial application.
However, the fine-grained structure of industria

Method used

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  • Preparation method of superplastic aluminum-based composite material plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In situ self-generated 6wt.%TiB obtained by casting 2 / 7050Al composite material plate, its processing method is:

[0029] (1) The particle-reinforced aluminum matrix composite material obtained by in-situ autogenous casting is subjected to homogenization heat treatment of alloy elements, the homogenization heat treatment temperature is 475 °C, and the heat treatment time is 24 hours;

[0030] (2) The in-situ particle reinforced aluminum matrix composite material after homogenization heat treatment is subjected to unidirectional hot extrusion deformation, the hot extrusion temperature is 450 ° C, and the extrusion ratio is 15:1 to obtain the aluminum matrix composite material to be processed;

[0031] (3) The aluminum-based composite material to be processed is subjected to solution treatment at 475°C, kept for 3 hours, and quickly put into 0°C water and quenched to room temperature after the heat preservation is completed;

[0032] (4) The above-mentioned aluminum-bas...

Embodiment 2

[0038] In situ self-generated 6wt.%TiB obtained by casting 2 / 7050Al composite material plate; its treatment method is:

[0039] (1) The particle-reinforced aluminum-based composite material obtained by in-situ autogenous casting is subjected to homogenization heat treatment of alloy elements, the homogenization heat treatment temperature is 475°C, and the homogenization heat treatment time is 24h;

[0040] (2) The in-situ particle reinforced aluminum matrix composite material after homogenization heat treatment is subjected to unidirectional hot extrusion deformation, the hot extrusion temperature is 450 ° C, and the extrusion ratio is 15:1 to obtain the aluminum matrix composite material to be processed;

[0041] (3) The aluminum-based composite material to be processed is subjected to solution treatment at 475°C, kept for 3 hours, and quickly put into 0°C water and quenched to room temperature after the heat preservation is completed;

[0042] (4) The above-mentioned alumi...

Embodiment 3

[0048] In situ self-generated 6wt.%TiB obtained by casting 2 / 7075Al composite material plate, the processing steps are:

[0049] (1) The particle-reinforced aluminum matrix composite material obtained by in-situ autogenous casting is subjected to homogenization heat treatment of alloy elements, the homogenization heat treatment temperature is 475°C, and the homogenization heat treatment time is 24h;

[0050] (2) The in-situ particle-reinforced aluminum matrix composite material after the homogenization heat treatment is subjected to unidirectional hot extrusion deformation, the hot extrusion temperature is 450°C, and the extrusion ratio is 15:1 to obtain the aluminum matrix composite material to be processed;

[0051] (3) The aluminum-based composite material to be processed is subjected to solution treatment at 475°C, kept for 3 hours, and quickly put into 0°C water and quenched to room temperature after the heat preservation is completed;

[0052] (4) The above-mentioned a...

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Abstract

The invention discloses a preparation method of a superplastic aluminum-based composite material plate. The method comprises the following steps: carrying out pre-rolling heat treatment including solid solution and overaging on a to-be-processed aluminum-based composite material, and turning and peeling the surface of the aluminum-based composite material after heat treatment until the surface is flat; and then carrying out multi-pass medium-temperature rolling, conducting homogenizing heat treatment before each pass of rolling, and stretching and straightening the rolled plate. According to the method, heat treatment before rolling and medium-temperature rolling machining forming are combined so that matrix grains are substantially refined, and the material forming rate is increased; the in-situ nano-particle reinforced phase TiB2 is added into aluminum alloy for pinning and rolling a grain boundary to prevent grain growth, the thermal stability is good, and the effect of suppressing the grain growth and cavity generation of grains in high-temperature deformation is achieved; and the longitudinal elongation of the plate can reach 350%-600% under the deformation process conditions of 400-475 DEG C and 10<-3>-10<-4>/s, and the high-temperature superplasticity is excellent.

Description

technical field [0001] The invention relates to the field of aluminum-based composite material processing, in particular to a preparation method of a superplastic aluminum-based composite material plate. Background technique [0002] Superplasticity refers to the ability of polycrystalline materials to exhibit ultrahigh elongation before fracture. Usually a material is said to be superplastic when its elongation is greater than 200%. The macroscopic characteristics of superplastic deformation can be classified into four points, which are large deformation, small deformation resistance, no necking, and easy forming. Although superplasticity is not a unique property of metallic materials, some non-metallic materials, such as ceramics and organic materials, can also exhibit superplasticity under specific microstructures, deformation temperatures and strain rates. However, due to the ultra-high plasticity of metal materials, the current research focus on superplasticity mainly...

Claims

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Application Information

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IPC IPC(8): C22F1/04
CPCC22F1/002C22F1/04
Inventor 王浩伟陈哲汪明亮吴一刘钧王磊周颖胡磊张晴
Owner SHANGHAI JIAO TONG UNIV
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