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Method for regulating and controlling creep anisotropy of cold-rolled pre-deformed alloy

An anisotropic and pre-deformation technology, applied in the field of aluminum alloy processing, can solve problems such as increasing the difficulty of springback prediction and compensation, and achieve high-efficiency and high-precision forming manufacturing, simple operation methods, and reduced creep aging. Anisotropic effect

Active Publication Date: 2021-07-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of creep aging deformation, creep deformation and precipitation strengthening occur at the same time. Due to the heterogeneity of the internal microstructure of the material, the anisotropy of creep strain and mechanical properties of the component will occur after creep aging deformation, increasing The difficulty of predicting and compensating springback after creep aging forming of components makes it a challenge to realize high-efficiency and high-precision forming and manufacturing of aluminum alloys with large deformation shapes

Method used

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  • Method for regulating and controlling creep anisotropy of cold-rolled pre-deformed alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The 2219 aluminum alloy is subjected to solution treatment and water quenching in an air circulation resistance furnace to obtain an aluminum alloy plate; then it is subjected to non-equal cross cold rolling at room temperature, and the total thickness is reduced by 80%. The first and second steps of rolling The ratio of the deformation amount is 1:1, and then the creep experiment is carried out in the creep machine. The creep aging temperature is 140°C, the creep time is 6h, and the creep stress is 150MPa.

Embodiment 2

[0030] The 2219 aluminum alloy is subjected to solution treatment and water quenching in an air circulation resistance furnace to obtain an aluminum alloy plate; then it is subjected to non-equal cross cold rolling at room temperature, and the total thickness is reduced by 80%. The first and second steps of rolling The ratio of the deformation amount is 3:1, and then the creep experiment is carried out in the creep machine. The creep aging temperature is 140°C, the creep time is 6h, and the creep stress is 150MPa.

Embodiment 3

[0032] The 2219 aluminum alloy is subjected to solution treatment and water quenching in an air circulation resistance furnace to obtain an aluminum alloy plate; then it is subjected to non-equal cross cold rolling at room temperature, and the total thickness is reduced by 80%. The first and second steps of rolling The ratio of the deformation amount is 4:1, and then the creep experiment is carried out in the creep machine. The creep aging temperature is 140°C, the creep time is 6h, and the creep stress is 150MPa.

[0033] The creep anisotropy index of table 1 comparative example 1 and embodiment 1-3

[0034]

[0035] Table 1 shows the creep anisotropy index of 2219 aluminum alloy after creep aging forming obtained by using the conventional rolling method and the unequal cross rolling method of the present invention. figure 1 Is the creep curve of the comparative examples and some examples. It can be found that the creep anisotropy of the aluminum alloy treated by the non-...

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Abstract

The invention provides a method for regulating and controlling the creep anisotropy of a cold-rolled pre-deformed alloy. In the method, two times of cold rolling is carried out on an aluminum alloy plate by adopting a non-equal-ratio cross rolling mode, and the creep anisotropy is regulated and controlled through the deformation proportion between the two times of cold rolling. The method specifically comprises the following steps that solid solution is carried out on the aluminum alloy plate; the aluminum alloy plate obtained after solid solution treatment is subjected to water quenching; and the aluminum alloy plate obtained after water quenching is subjected to cold rolling twice, and then creep age forming is conducted. According to the method, the non-equal-ratio cross rolling method is adopted, the creep aging anisotropy of the aluminum alloy material can be greatly reduced on the premise that the high creep aging deformation efficiency of the aluminum alloy is kept, the operation method is simple and convenient, the method is suitable for actual production and application, and high-efficiency and high-precision forming and manufacturing of the aluminum alloy component can be achieved.

Description

technical field [0001] The invention relates to the field of aluminum alloy processing, in particular to a method for regulating and controlling the creep anisotropy of cold-rolled pre-deformed alloys. Background technique [0002] Aluminum and aluminum alloys have the advantages of low density, high corrosion resistance, and good electrical and thermal conductivity, and are widely used in aerospace and rail transportation and other fields. In order to meet the development needs of modern aerospace / high-speed rail and other large-scale carrier equipment, higher-quality manufacturing requirements are put forward for parts and components used in complex environments. It has become a task to achieve high-performance, high-precision and overall structural manufacturing of complex-shaped components. One of the key manufacturing technologies in the field of modern manufacturing. Creep aging forming is an advanced forming technology that slowly deforms and ages strengthen material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C21D1/18C21D8/02
CPCC22F1/04C22F1/002C21D1/18C21D8/0236C21D8/0247
Inventor 刘春辉陈龙辉杨建使马培培湛利华
Owner CENT SOUTH UNIV
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