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High-strength high-surface anodic oxidation appearance aluminum alloy strip and preparation method thereof

An aluminum alloy strip and anodic oxidation technology, which is applied in the field of high-strength high-surface anodized appearance aluminum alloy strip and its preparation, can solve the problems of not being able to have high surface appearance and high-strength performance at the same time, and achieve high yield strength and surface Delicate and bright color effect

Inactive Publication Date: 2018-06-12
ZHEJIANG YONGJIE ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a high-strength high-surface anodized appearance aluminum alloy strip and its preparation method, which mainly solves the problem that aluminum profiles in the prior art need to be extruded and then quenched + aged to obtain high strength, while aluminum Alloy strips need to obtain strength through solid solution strengthening of solid solution elements and work hardening given by cold rolling, and cannot have high surface appearance and high strength performance at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: A high-strength and high-surface anodized aluminum alloy strip in this example, the composition and mass percentage are: Mg 4.5wt%, Zn 0.6wt%, Si 0.04wt%, Fe 0.08wt%, Mn 0.03wt %, Cr 0.001wt%, Ti0.008wt%, Cu 0.05wt%, and the balance is Al.

[0018] A method for preparing an aluminum alloy strip with high strength and high surface anodic oxidation appearance, the steps are:

[0019] 1) Aluminum ingots are melted in a melting furnace, and after batching, semi-continuous casting is carried out;

[0020] 2) The cast ingot enters the heating furnace after sawing and milling, the metal temperature is 510°C, the time is 20h, and then it is hot-rolled out of the furnace, the hot-rolling finishing temperature is 300°C, and the hot-rolling thickness is 6.0mm;

[0021] 3) The hot-rolled coil is cold-rolled to a thickness of 1.2mm, with a reduction rate of 80%, and then intermediate annealed. The intermediate annealing is carried out on the air cushion furnace, the met...

Embodiment 2

[0024] Example 2: A high-strength and high-surface anodized aluminum alloy strip in this example, the composition and mass percentage are: Mg 4.8wt%, Zn 0.8wt%, Si 0.02wt%, Fe 0.035wt%, Mn 0.03wt %, Cr 0.001wt%, Ti0.005wt%, Cu 0.01wt%, and the balance is Al.

[0025] A method for preparing an aluminum alloy strip with high strength and high surface anodic oxidation appearance, the steps are:

[0026] 1) Aluminum ingots are melted in a melting furnace, and after batching, semi-continuous casting is carried out;

[0027] 2) The cast ingot enters the heating furnace after sawing and face milling, the metal temperature is 510°C, the time is 20h, and then it is hot-rolled out of the furnace, the hot-rolling finishing temperature is 300°C, and the hot-rolling thickness is 7.0mm;

[0028] 3) The hot-rolled coil is cold-rolled to a thickness of 3.2mm, with a reduction ratio of 40%, and then intermediate annealed. The intermediate annealing is carried out in the strip annealing furna...

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Abstract

The invention relates to the field of preparation of aluminum and aluminum alloy strips, in particular to a high-strength high-surface anodic oxidation appearance aluminum alloy strip and a preparation method thereof. The high-strength high-surface anodic oxidation appearance aluminum alloy strip and the preparation method thereof mainly solve the technical problems of incapability of synchronously achieving high surface appearance and high strength because an aluminum profile in the prior art can achieve high strength through quenching and ageing after extrusion but an aluminum alloy strip can achieve strength through solid solution strengthening of solid solution elements and hardening given by cold rolling. The aluminum alloy strip comprises the following components in percentage by mass: 3.0-5.0 wt% of Mg, 0.1-1.0 wt% of Zn, no more than 0.05 wt%of Si, no more than 0.10 wt%of Fe, no more than 0.05 wt%of Mn,no more than 0.1 wt%of Cr, no more than 0.05 wt%of Ti, nomore than 0.10 wt%of Cu, and the balance Al, wherein Fe / Si=1-3.

Description

technical field [0001] The invention relates to the field of preparation of aluminum and aluminum alloy strips, in particular to an aluminum alloy strip with high strength and high surface anodic oxidation appearance and a preparation method thereof. Background technique [0002] With the fierce competition of 3C electronic products, especially the popularity of aluminum alloy shells in low-end products, such products put forward higher and higher requirements for the appearance and cost of anodized metal shells. In order to greatly reduce the cost, the processing technology of metal casings has gradually changed from aluminum alloy profiles + a large number of CNC processing to aluminum alloy strips + stamping + a small amount of CNC processing. Therefore, aluminum alloy strips gradually replace aluminum profiles and become the new favorite material for anodizing metal casings. . [0003] In the original technology, aluminum profiles are extruded and then quenched + aged t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22F1/047
CPCC22C21/08C22F1/047
Inventor 陈登斌许泽辉孔军黄媚侯志文
Owner ZHEJIANG YONGJIE ALUMINUM CO LTD
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