High-strength 6xxx aluminum alloy for mobile phone parts and machining method thereof

A processing method and aluminum alloy technology, which is applied to aluminum alloys, 6xxx series aluminum alloys for mobile phone parts and their manufacturing fields, can solve the problems that are difficult to meet the development needs of smart phones, surface defects, surface coarse grains, etc., and achieve market application prospects Broad, optimized processing technology, good overall performance effect

Inactive Publication Date: 2016-02-03
苏州有色金属研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with 6061 aluminum alloy, 6063 aluminum alloy has better anodic oxidation performance, but the strength of 6063 aluminum alloy is much lower than that of 6061 aluminum alloy, and the performance of existing 6061 aluminum alloy is becoming more and more difficult to meet the needs of the development of smart phones
On the other hand, in order to imp

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  • High-strength 6xxx aluminum alloy for mobile phone parts and machining method thereof
  • High-strength 6xxx aluminum alloy for mobile phone parts and machining method thereof

Examples

Experimental program
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Example Embodiment

[0052] Example 1

[0053] The components of the aluminum alloy in terms of mass percentage are: Mg0.85wt%, Si0.80wt%, Cu0.25wt%, Mn0.10wt%, Cr0.17wt%, Fe0.16wt%, Zn0.02wt%, Ti0.02wt%, more The amount is Al.

[0054] Homogenizing heat treatment for alloy cast rods: raising to 420°C for 8 hours at a rate of 40°C / h, then raising to 560°C for 20 hours at a rate of 50°C / h, forced air cooling (cooling rate greater than 60°C / h) . The material is extruded (the heating temperature of the extruded ingot is 500°C, the temperature of the extrusion barrel is 470°C, the die temperature is 500°C, and the extrusion rod speed is 2.9mm / s), online quenching, straightening and artificial aging.

Example Embodiment

[0055] Example 2

[0056] The components of the aluminum alloy in terms of mass percentage are: Mg0.9wt%, Si0.9wt%, Cu0.35wt%, Mn0.35wt%, Cr0.16wt%, Fe0.15wt%, Zn0.02wt%, Ti0.02wt%, and the rest The amount is Al.

[0057] Homogenizing heat treatment for alloy cast rods: heat up to 450°C at a rate of 50°C / h for 5 hours, then at a rate of 50°C / h to 560°C for 10 hours, forced air cooling (cooling rate greater than 100°C / h) . The material is extruded (the heating temperature of the extruded ingot is 506°C, the temperature of the extrusion barrel is 470°C, the die temperature is 500°C, and the extrusion rod speed is 2.9mm / s), online quenching, straightening and artificial aging.

Example Embodiment

[0058] Example 3

[0059] The components of aluminum alloy in mass percentage are: Mg0.9wt%, Si1.1wt%, Cu0.75wt%, Mn0.40wt%, Cr0.20wt%, Fe0.15wt%, Zn0.02wt%, Ti0.02wt%, the rest The amount is Al.

[0060] Homogenization heat treatment for alloy cast rods: increase to 470°C for 4 hours at a rate of 70°C / h, then increase to 550°C for 10 hours at a rate of 70°C / h, forced air cooling (cooling rate greater than 80°C / h) . The material is extruded (the heating temperature of the extruded ingot is 510°C, the temperature of the extrusion barrel is 470°C, the die temperature is 500°C, and the extrusion rod speed is 2.9mm / s), online quenching, straightening and artificial aging.

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Abstract

The invention relates to a high-strength 6xxx aluminum alloy for mobile phone parts and a machining method thereof. The high-strength 6xxx aluminum alloy comprises, by weight, 0.6-1.3% of Mg, 0.6-1.3% of Si, 0.1-1.0% of Cu, 0.1-1.2% of Mn, 0.10-0.5% of Cr, 0-0.25% of Zr, 0-0.20% of Ti, 0-0.50% of Zn, 0-0.40% of Fe, and the balance Al and inevitable impurities. The machining process of the high-strength 6xxx aluminum alloy comprises the steps that firstly, cast ingots are subjected to homogenizing heat treatment and then subjected to forced air cooling, and then the cast ingots are extruded after being preheated; and secondly, the cast ingots are subjected to on-line water hardening, straightening and artificial aging. According to the high-strength 6xxx aluminum alloy for the mobile phone parts and the machining method thereof, on the basis of guaranteeing the anodic oxidization property of the alloy, the strength of the alloy is improved; the aluminum alloy is an ideal material for manufacturing external parts of electronic products and has wide market application prospects.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to a 6xxx series aluminum alloy for mobile phone parts and a manufacturing method thereof, belonging to the technical field of nonferrous metals. Background technique [0002] The lightness and thinning of smartphones put forward higher requirements for the performance of mobile phone components, such as middle frames and casings: that is, they have higher strength when the anodic oxidation performance is good. The use of aluminum alloy to manufacture the middle frame and shell of smart phones is the current development trend of the mobile phone industry. The biggest advantage of aluminum alloy materials applied to mobile phone products lies in good thermal conductivity and high mechanical properties: the hardness of aluminum alloy is several times that of traditional plastic parts; the heat dissipation performance of aluminum alloy is much better than plastic, which can quickly convert smart T...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22F1/04
Inventor 刘成钟皓赵健熊明华
Owner 苏州有色金属研究院有限公司
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