High-performance 5xxx series aluminium alloy and processing method thereof

A processing method and technology of aluminum alloy, applied in the field of non-ferrous metals, can solve the problems of limiting the application range of 5 series stamping sheets, high processing costs, poor mechanical properties and surface effects, etc.

Active Publication Date: 2016-10-12
苏州中色研达金属技术有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the following disadvantages: a large waste of materials, about 90% of the raw materials are machined; high processing costs, the cost of machining is about 9 times the cost of raw materials
Both are used in the manufacture of mobile phone exterior parts, but the mechanical properties and surface effects of both are worse than those of extruded 6-series aluminum, which limits the application range of 5-series stamped sheets

Method used

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  • High-performance 5xxx series aluminium alloy and processing method thereof

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Effect test

Embodiment 1

[0020] The composition of ingot aluminum alloy is calculated by mass percentage: Mg: 4.2wt%, Si: 0.03wt%, Cu: 0.06wt%, Mn: 0.001wt%, Cr: 0.01wt%, Fe: 0.08wt%, Ti: 0.01 wt%, the balance is Al.

[0021] Homogenizing heat treatment of alloy ingots: heat preservation at 420°C for 8 hours, then rise to 500°C for 6 hours; then perform hot rolling, the starting temperature is 500°C, and the final rolling temperature is controlled below 320°C; for cold-rolled billets Subsequent cold rolling is carried out, and when the total reduction is 70%, intermediate annealing is carried out at 300°C for 4h.

Embodiment 2

[0023] The composition of ingot aluminum alloy is calculated by mass percentage: Mg: 3.2wt%, Si: 0.05wt%, Cu: 0.001wt%, Mn: 0.001wt%, Cr 0.002wt%, Fe 0.10wt%, Ti 0.01wt%, The balance is Al.

[0024] Homogenizing heat treatment of alloy ingots: heat preservation at 430°C for 5 hours, then rise to 510°C for 8 hours; then perform hot rolling, the starting temperature is 500°C, and the final rolling temperature is controlled below 280°C; for cold-rolled billets Subsequent cold rolling is carried out, and when the total reduction is 50%, intermediate annealing is carried out at 300°C for 6h.

Embodiment 3

[0026] The composition of ingot aluminum alloy is calculated by mass percentage: Mg: 4.8wt%, Si: 0.06wt%, Cu: 0.001wt%, Mn: 0.001wt%, Cr: 0.001wt%, Fe: 0.12wt%, Ti: 0.02 wt%, the balance is Al.

[0027] Homogenizing heat treatment for alloy ingots: keep warm at 440°C for 6 hours, then raise to 520°C for 5 hours; Subsequent cold rolling is carried out, and when the total reduction is 80%, intermediate annealing is carried out at 320° C. for 4 hours.

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Abstract

The invention discloses a high-performance 5xxx series aluminium alloy and a processing method thereof. The high-performance 5xxx series aluminium alloy comprises the components: 2.0-5.0wt% of Mg, less than or equal to 0.10wt% of Si, less than or equal to 0.10wt% of Cu, less than or equal to 0.10wt% of Mn, less than or equal to 0.10wt% of Cr, less than or equal to 0.1wt% of Ti, less than or equal to 0.20wt% of Fe, and the balance Al and unavoidable impurities. The processing method of the high-performance 5xxx series aluminium alloy comprises the steps that a cast ingot is subjected to homogenizing annealing, is heated to 420-440 degrees from room temperature and is subjected to heat preservation for 4-10h, then is heated to 460-530 degrees and is subjected to heat preservation for 5-12h; hot rolling is carried out with the initial rolling temperature being 460-530 degrees and the finish rolling temperature being below 360 degrees; and a cold rolled blank is subjected to follow-up cold rolling, and intermediate annealing is carried out for one time when the total reduction is 40-70%. Through adjusting the contents of elements in the 5xxx series aluminium alloy and the processing technique, the structure of the 5xxx series aluminium alloy is uniform, and the 5xxx series aluminium alloy has high strength and good anodic oxidation performance.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to an aluminum alloy for mobile phone appearance parts and a processing method thereof, belonging to the technical field of nonferrous metals. Background technique [0002] The current application trend of smart phones is to use aluminum alloy to make appearance parts. 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 The large amount of heat generated by the application processing chip in the mobile phone is transferred to the outside in a timely manner; at the same time, compared with engineering plastics, aluminum alloy is easier to color during surface treatment, thus making mobile phone products more b...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C21/08C22F1/047
CPCC22C21/06C22C21/08C22F1/047
Inventor 钟皓司开田熊明华赵健杨阳杨达彬张道曾红生
Owner 苏州中色研达金属技术有限公司
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