Cold rolling method of 5-series aluminum plate free of discoloration defect after anodizing

An aluminum sheet and anodizing technology, which is applied in the field of alloys, can solve problems such as discoloration of aluminum alloy sheets, and achieve the effects of reducing anisotropy, uniform color, and easy realization

Active Publication Date: 2018-03-13
CHINALCO RUIMIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of discoloration of aluminum alloy sheets used for anodic oxidation, and provide a cold rolling method for 5-series aluminum sheets without discoloration defects after anodization

Method used

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  • Cold rolling method of 5-series aluminum plate free of discoloration defect after anodizing
  • Cold rolling method of 5-series aluminum plate free of discoloration defect after anodizing
  • Cold rolling method of 5-series aluminum plate free of discoloration defect after anodizing

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Effect test

Embodiment 1

[0026] A 5-series aluminum alloy plate for anodization, with a Mg content between 4.35% and 4.95%. The aluminum alloy ingot is produced by the direct cooling casting method, and then uniformly heat-treated at 470°C for 10 hours; then hot-rolled into a billet with a thickness of 8.0mm , and then cold rolling, the reduction ratio is 45%-16%-30%-intermediate annealing-23%-20%, to obtain a plate with a thickness of 1.6mm, wherein the intermediate annealing temperature is 320 ° C, and the heat preservation is 2h; the obtained Aluminum alloy plate, after industrial anodizing treatment and sealing treatment, the surface effect is qualified, such as figure 1 As shown, it can meet the requirements of electronic and electrical products for anodized aluminum alloy appearance parts.

Embodiment 2

[0028] A 5-series aluminum alloy plate for anodization, with a Mg content between 4.35% and 4.95%. The aluminum alloy ingot is produced by the direct cooling casting method, and then uniformly heat-treated at 510°C for 10 hours; then hot-rolled into a billet with a thickness of 6.5mm , and then cold rolling, the reduction rate is 35%-27%-17%-intermediate annealing-25%, and a 1.5mm plate is obtained; the intermediate annealing temperature is 340°C, and the heat preservation is 2h. The obtained aluminum alloy plate, after Industrial anodizing treatment and sealing treatment, the surface effect is qualified, such as figure 2 As shown, it can meet the requirements of electronic and electrical products for anodized aluminum alloy appearance parts.

Embodiment 3

[0030] A 5-series aluminum alloy plate for anodization, with a Mg content between 2.35% and 2.85%. The aluminum alloy ingot is produced by direct cooling casting, and then subjected to a uniform heat treatment at 480°C for 10 hours; then hot-rolled into a billet with a thickness of 6.5mm , and then cold rolling, the reduction ratio is 35%-27%-16%-intermediate annealing-30%-21%, to obtain a 1.1mm plate; the annealing temperature is 320°C, and the heat preservation is 4h. The prepared aluminum alloy plate , after industrial anodizing treatment and coloring (golden) treatment, followed by sealing treatment, the surface effect is excellent, such as image 3 As shown, it can meet the requirements of electronic and electrical products for anodized aluminum alloy appearance parts.

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Abstract

The invention provides a cold rolling method of a 5-series aluminum plate free of discoloration defect after anodizing. The 5-series aluminum plate is subjected to semicontinuous casting and homogenization treatment, then a hot-rolled plate with the thickness being 4-8 mm is obtained through hot rolling, a plate with the thickness being 0.3-4.0 mm is prepared through 2-10 passes of cold rolling machining, and recrystallization annealing treatment is conducted in the cold rolling process once. After an aluminum material obtained through the cold rolling method is subjected to anodizing and coloring treatment, the surface of the aluminum material is uniform in color and free of defects such as color difference, pits and the like, the requirements of electric equipment product outer parts forthe anodized aluminum material can be met, the product market competitiveness is obvious, and the economic benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of alloys, and in particular relates to a cold-rolling method of a 5-series aluminum plate without any color defect after anodization. Background technique [0002] After anodic oxidation treatment, the aluminum alloy has good wear resistance and corrosion resistance. After coloring, the appearance can show a variety of colors, and the application prospect is huge. However, after the aluminum material is anodized and colored, there is a phenomenon of uneven surface color distribution. At present, in the field of electronic 3C products, 6-series aluminum alloy extruded profiles are mainly used, and the shell structure materials are prepared by CNC processing, which has low efficiency and large consumption. Therefore, there is an urgent need for a 5-series aluminum alloy plate with excellent surface quality after anodizing and coloring treatment. [0003] The typical preparation technology route of 5-series ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/047C21D8/00
CPCC21D8/00C22F1/047
Inventor 黄瑞银高崇赵丕植吴建新方小明江钟宇
Owner CHINALCO RUIMIN
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