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Production method for thin aluminum alloy sheets

A production method and technology of aluminum alloy, applied in the field of aluminum alloy, can solve the problems of high production cost of aluminum alloy plate, affecting the quality and precision of parts, poor uniformity of plate structure, etc., achieving low equipment requirements, improving yield, and avoiding component segregation Effect

Active Publication Date: 2019-02-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the aluminum alloy sheet produced by the above-mentioned method has its own defects, such as poor uniformity of the internal structure of the sheet, defects such as composition segregation and inclusions during the casting process, uneven residual stress, and poor formability, which makes the application process Aluminum alloy sheet is easy to deform when processing parts, which affects the quality and precision of processed parts
In addition, the utilization rate of materials in the production process of casting method is low, and its production process is long, so the production cost of aluminum alloy plate is high

Method used

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  • Production method for thin aluminum alloy sheets
  • Production method for thin aluminum alloy sheets
  • Production method for thin aluminum alloy sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of 2A12 aluminum alloy sheet with a thickness of 0.5mm;

[0044] According to the production method of the present invention, the 250-300 mesh spherical 2A12 aluminum alloy powder (near spherical powder prepared by water atomization method) produced by Changsha Tianjiu Metal Materials Co., Ltd. is used as the raw material powder (its chemical composition conforms to the provisions of GB / T3190) , its plate production process is as follows figure 1As shown, the powder is pressed into a steel mold to prepare a green body (the thickness of the green body is 3 mm), and the green body is sintered in a high-vacuum precision vacuum hot pressing furnace to prepare a cold-rolled sheet raw material (sintering temperature 575°C, time 120min, pressure 10MPa), the sintered billet was cut into small cube plates (2.5mm in thickness) by wire cutting, and the surface was cleaned, and the small cube plates were rolled on a reversible two-roll cold rolling mill, and pressed dow...

Embodiment 2

[0047] Preparation of 2A12 aluminum alloy sheet with a thickness of 1.0mm;

[0048] The preparation process is consistent with the process in Example 1, and details are shown in the production process of the thin plate in Example 1 (the total deformation of the plate is 60%). The resulting sheet had a tensile strength of 311.59 MPa.

[0049] The above experiment was repeated 100 times, and the yield was 99%. It can be seen from Example 1 and Example 2 that the total deformation of the rolled sheet affects its tensile strength.

Embodiment 3

[0051] Preparation of 2A12 aluminum alloy sheet with a thickness of 0.5mm;

[0052] According to the production method of the present invention, the 250-300 mesh spherical 2A12 aluminum alloy powder (near spherical powder prepared by water atomization method) produced by Changsha Tianjiu Metal Materials Co., Ltd. is used as the raw material powder (its chemical composition conforms to the provisions of GB / T3190) , its plate production process is as follows figure 1 As shown, the powder is pressed and formed by a steel mold to prepare a green body (the thickness of the green body is 3 mm), and the green body is sintered in a high-vacuum precision vacuum hot pressing furnace to prepare a cold-rolled strip raw material (sintering temperature 535 ° C, time 120 min, The pressure is 10MPa), the sintered blank is cut into small cubes (thickness is 2.5mm) by wire cutting, and the surface is cleaned, and the small cubes are rolled on a reversible two-roll cold rolling mill. The loweri...

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Abstract

The invention provides a production method for aluminum alloy sheets. The production method comprises the steps of compacting aluminum alloy powder, sintering, machining, performing multi-pass cold rolling, finishing and shearing and performing final annealing; blank annealing is performed on sintered blanks before cold rolling; during multi-pass cold rolling, reduction rate of each pass is lessthan 8 percent before total deformation reaches 50 percent, and the reduction rate of each pass is 10 to 30 percent after the total deformation is greater than 50 percent; the total deformation of thealuminum alloy sheets is 50 to 92 percent after multi-pass cold rolling; and cold rolling of any pass is assisted by intermediate annealing. The production method for the aluminum alloy sheets provided by the invention can be used for producing the aluminum alloy sheets in batches; compared with aluminum alloy sheets produced by a cast rolling method, the aluminum alloy sheets produced by the production method provided by the invention are low in cost, uniform in strip microscopic structure and size, free of segregation and high in strength; and compared with a method for producing aluminum alloy sheets by directly rolling powder, the production method provided by the invention has a simple technology, and is more flexible and economic to apply; and the sheets are high in compactness, anddo not have a hole flaw and the like.

Description

technical field [0001] The invention relates to a production method of an aluminum alloy thin plate, and belongs to the technical field of aluminum alloys. Background technique [0002] Aluminum alloy plate is an industrial building material, which is used in various industries according to different materials, such as aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. [0003] At present, aluminum alloy sheet is the main one of aluminum alloy profiles, and it is also the one with the largest industrial consumption. A sheet of predetermined thickness is then cold-rolled to the final thickness in a separate process, followed by a heat treatment process. [0004] However, the aluminum alloy sheet produced by the above method has its own defects, such as poor uniformity of the internal structure of the sheet, defects such as component segregation and inclusion during the casting process, uneven residual stress, and poor formability, w...

Claims

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Application Information

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IPC IPC(8): B22F3/18B22F3/24C22F1/057
CPCB22F3/18B22F3/24B22F2003/248B22F2998/10C22F1/057B22F3/02B22F3/14B22F2003/247
Inventor 马运柱王涛刘文胜刘超刘阳伍镭颜焕元
Owner CENT SOUTH UNIV
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