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3c 6xxx series aluminum alloys for exterior parts of products and their processing methods

A technology of aluminum alloy and appearance parts, which is applied in the field of non-ferrous metals, can solve the problems of unfavorable anodic oxidation effect and influence of materials, achieve high hardness and anodic oxidation effect, high aging hardening ability, and broad market application prospects

Active Publication Date: 2019-02-12
苏州中色研达金属技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Cu can improve the strength of the material, it has a very adverse effect on the anodic oxidation effect of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Ingot composition and content are: Mg 0.51wt%, Si 0.54wt%, Mn 0.03wt%, Ti0.02wt%, Sn0.01wt%, Fe 0.08wt%, Cu 0.01wt%, Cr 0.01wt%; Insulate at 300°C for 10 hours, then at 570°C for 10 hours; then roll, solution treat, and store at room temperature for 72 hours, the size of the largest atomic cluster is less than 4 atoms; the artificial aging system is 160°C for 12 hours.

Embodiment 2

[0023] The composition and content of the ingot are: Mg 0.65wt%, Si 0.69wt%, Mn 0.04wt%, Ti0.03wt%, Sn0.10wt%, Fe 0.10wt%, Cu 0.008wt%, Cr 0.007wt%; Insulate at 360°C for 6 hours, then at 545°C for 8 hours; then roll, solution treat, and store at room temperature for 72 hours, the size of the largest atomic cluster is less than 4 atoms; the artificial aging system is 200°C for 2 hours.

Embodiment 3

[0025] The composition and content of the ingot are: Mg 0.73wt%, Si 0.70wt%, Mn 0.05wt%, Ti0.03wt%, Sn0.10wt%, Fe 0.10wt%, Cu 0.008wt%, Cr 0.007wt%; Insulate at 360°C for 6 hours, and then at 545°C for 8 hours; then roll, solution treat, and store at room temperature for 72 hours, the size of the largest atomic cluster is less than 4 atoms; the artificial aging system is 175°C for 4 hours.

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Abstract

The invention relates to 6xxx-series aluminum alloy applied to a 3C product exterior part and a machining method of the 6xxx-series aluminum alloy. The aluminum alloy comprises the following ingredients in content: 0.4wt% to 0.8wt% of Mg, 0.4wt% to 0.8wt% of Si, 0.02wt% to 0.05wt% of Mn, 0.02wt% to 0.05wt% of Ti, 0.01wt% to 0.10wt% of Sn, smaller than or equal to 0.10wt% of Fe, smaller than or equal to 0.01wt% of Cu and smaller than or equal to 0.01wt% of Cr. The machining method of the aluminum alloy comprises the following steps: uniformly annealing a cast ingot; maintaining the temperature at 300 to 360 DEG C for 6 to 10 hours; subsequently maintaining the temperature at 545 to 570 DEG C for 8 to 10 hours; afterwards performing rolling and solution treatment; and staying at room temperature and performing artificial aging treatment within 72 hours. By adding trace elements, reasonably optimizing the alloy ingredients and controlling the process, the aluminum alloy provided by the invention realizes combination of relatively high age-hardening capability, high hardness and anodic oxidation effect, is an ideal material for manufacturing an electronic product exterior part and is wide in market application prospects.

Description

technical field [0001] The invention relates to a 6xxx series aluminum alloy for 3C product exterior parts and a processing method thereof, belonging to the technical field of nonferrous metals. Background technique [0002] Usually, 6xxx series aluminum alloys have a room temperature parking effect, that is, after the material is quenched, artificial aging must be carried out immediately, otherwise the peak aging time will be delayed, or even the peak strength will be reduced. However, in the production process of 6xxx series aluminum alloys, due to equipment or production arrangements, artificial aging is usually not possible immediately, which will reduce the mechanical properties of the material. Generally, a small amount of Cu element (such as 6061, 6111) is added to the 6xxx series aluminum alloys to reduce the adverse effect of the parking effect at room temperature on the final strength properties of the material. However, the addition of Cu will adversely affect th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
CPCC22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
Inventor 钟皓司开田卢长德赵健杨达彬张道曾红生
Owner 苏州中色研达金属技术有限公司
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