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Method for eliminating annealing wrinkles of aluminum alloy strip

A technology for aluminum alloy strips and aluminum alloys, applied in furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as wrinkling, achieve uniform internal stress distribution, and avoid extrusion deformation.

Active Publication Date: 2021-07-23
GUANGXI LIUZHOU YINHAI ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a production method for eliminating annealing wrinkling of aluminum alloy strips, which can solve the problem of wrinkling defects appearing in the middle of the inner ring width direction of aluminum alloy cold-rolled strips after annealing

Method used

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  • Method for eliminating annealing wrinkles of aluminum alloy strip
  • Method for eliminating annealing wrinkles of aluminum alloy strip
  • Method for eliminating annealing wrinkles of aluminum alloy strip

Examples

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Embodiment 1

[0025] Adopt the method of the present invention to process aluminum alloy strip material 1, alloy 1100 (this alloy belongs to 1XXX series aluminum alloy), blank thickness 3.0mm, finished product thickness 0.6mm, width 1200mm, roll diameter 2000mm, comprising the following steps:

[0026] A. Billet opening pass, the pass reduction is 35%, and the thickness is rolled from 3.0mm to 1.95mm;

[0027] B. In the middle pass, the reduction in the second pass is 40%, and the thickness is rolled from 1.95mm to 1.17mm; the reduction in the third pass is 35%, and the thickness is rolled from 1.17mm to 0.76mm;

[0028] C. The final pass, the pass reduction is 20%, and the thickness is rolled from 0.76mm to 0.6mm;

[0029] D. Complete annealing starts to heat up, the furnace gas temperature rises to 500°C, and the heating time is 8 hours;

[0030] E. The temperature of the aluminum alloy strip is raised to the target temperature of complete annealing, kept warm, and cooled to 200°C with t...

Embodiment 2

[0032] Adopt the method of the present invention to process aluminum alloy strip 2, alloy 3003 (this alloy belongs to 3XXX series aluminum alloy), blank thickness 3.0mm, finished product thickness 0.6mm, width 2200mm, roll diameter 1800mm, comprising the following steps:

[0033] A. Billet opening pass, the pass reduction is 35%, and the thickness is rolled from 3.0mm to 1.95mm;

[0034] B. In the middle pass, the reduction in the second pass is 40%, and the thickness is rolled from 1.95mm to 1.17mm; the reduction in the third pass is 35%, and the thickness is rolled from 1.17mm to 0.76mm;

[0035] C. The final pass, the pass reduction is 20%, and the thickness is rolled from 0.76mm to 0.6mm;

[0036] D. Complete annealing begins to heat up, the temperature of the furnace gas rises to 450°C, and the temperature rises for 10 hours;

[0037] E. The temperature of the aluminum alloy strip is raised to the target temperature of complete annealing, kept warm, and cooled to 200°C w...

Embodiment 3

[0039] Adopt the method of the present invention to process aluminum alloy strip 3, alloy 5052 (this alloy belongs to 5XXX series aluminum alloy), blank thickness 3.0mm, finished product thickness 0.74mm, width 2600mm, roll diameter 1800mm, comprising the following steps:

[0040] A. Billet opening pass, the pass reduction is 25%, and the thickness is rolled from 3.0mm to 2.25mm;

[0041] B. In the middle pass, the reduction in the second pass is 30%, the thickness is rolled from 2.25mm to 1.58mm, the reduction in the third pass is 27%, the thickness is rolled from 1.58mm to 1.15mm, and the thickness is rolled in the third pass The weight is 24%, and the thickness is rolled from 1.15mm to 0.87mm;

[0042] C. The final pass, the pass reduction is 15%, and the thickness is rolled from 0.87mm to 0.74mm;

[0043] D. Complete annealing begins to heat up, the temperature of the furnace gas rises to 400 ° C, and the temperature rises for 12 hours;

[0044] E. The temperature of the...

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Abstract

The invention discloses a method for eliminating annealing wrinkles of an aluminum alloy strip, and belongs to the technical field of aluminum alloy production. Before complete annealing, the rolling reduction of the first pass of cold rolling of the aluminum alloy strip is controlled to be 25%-35%; the rolling reduction of the middle pass of the cold rolling of the aluminum alloy strip is controlled to be 25%-40%, and the rolling reduction is gradually reduced by 3%-5% one by one; the final pass rolling reduction of the cold rolling of the aluminum alloy strip is controlled to be 15%-20%; heating is started after the complete annealing, the temperature of furnace gas rises to 400-500 DEG C, and the heating time is longer than or equal to 8 hours; and the furnace gas is heated to a target temperature for the complete annealing, heat preservation is conducted, cooling is conducted to 200 DEG C or below along with a furnace after the heat preservation, and discharging is conducted from the furnace. The invention provides a production method for eliminating the annealing wrinkles of the aluminum alloy strip. The method can solve the problem that after an aluminum alloy cold-rolled strip is annealed, wrinkles appear in the middle of an inner ring of a coiled material in the width direction.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy production, in particular to a method for eliminating annealing wrinkling of aluminum alloy strips in the aluminum alloy production process. Background technique [0002] In the production process of aluminum alloy, since complete annealing can eliminate work hardening, restore the material to its original state, and obtain O state, it is often necessary to perform complete annealing, and then perform corresponding cold deformation after complete annealing to obtain the corresponding state and performance . [0003] However, in the actual production process, we often find that after the aluminum alloy strip is fully annealed, irregular annealing wrinkling defects will occur in the middle of the strip at the inner diameter of the coil with a wall thickness of 200 mm to 300 mm, and the occurrence of annealing wrinkling defects The reason is: during the rolling process of the aluminum alloy s...

Claims

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Application Information

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IPC IPC(8): C22F1/04C21D8/02C21D1/26C21D9/52
CPCC22F1/04C21D8/0236C21D8/0247C21D1/26C21D9/52
Inventor 梁新华马英义黄文辉盘健进庞凤蒋泽鑫覃燕玲
Owner GUANGXI LIUZHOU YINHAI ALUMINUM IND
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