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6XXX aluminum alloy and machining method thereof

A processing method and technology of aluminum alloy, applied in the field of high-strength aluminum alloy for exterior parts of electronic products and its processing, 6XXX series aluminum alloy field, to achieve the effect of good anodizing performance, high strength and broad market application prospects

Active Publication Date: 2016-01-13
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

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Problems solved by technology

[0003] The strength and anodic oxidation performance of the material are determined by the alloy composition, but the prior art (such as CN103131904A, US4589932, US20140017116) often focuses on improving the strength of the material by adjusting the composition, while ignoring the influence of the composition on the anodic oxidation performance. has limitations

Method used

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  • 6XXX aluminum alloy and machining method thereof
  • 6XXX aluminum alloy and machining method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Semi-continuous cast rod: diameter 178mm, cast rod composition in terms of mass percentage: Mg: 1.12wt%, Si: 1.05wt%, Cu: 0.95wt%, Mn: 0.01wt%, Cr: 0.01wt%, Fe: 0.13 wt%, Zn: 0.1wt%, Ti: 0.04wt%, Zr: 0.002wt%, and the balance is Al.

[0033] Homogenization heat treatment for alloy cast rods: from room temperature to 530°C at a rate of 90°C / h, and keep it for 15 hours, then raise it to 550°C at a rate of 50°C / h, keep it for 20 hours, and then heat it at 160°C / h Fast cool down. The material is extruded (the heating temperature of the extrusion ingot is 520°C, the temperature of the extrusion cylinder is 470°C, the temperature of the mold is 500°C, the speed of the extrusion rod is 2.8mm / s, and the outlet temperature of the extruded material is 540°C), on-line After quenching and straightening, carry out artificial aging (175℃×8h).

Embodiment 2

[0035] Semi-continuous cast rod: diameter 178mm, cast rod composition in terms of mass percentage: Mg: 0.97wt%, Si: 1.03wt%, Cu: 0.88wt%, Mn: 0.005wt%, Cr: 0.005wt%, Fe: 0.12 wt%, Zn: 0.02wt%, Ti: 0.02wt%, Zr: 0.005wt%, and the balance is Al.

[0036] Homogenizing heat treatment for alloy cast rods: from room temperature to 535°C at a rate of 80°C / h, and keep it for 12 hours, then raise it to 550°C at a rate of 15°C / h, keep it for 20 hours, and then heat it at 160°C / h Fast cool down. The material is extruded (the heating temperature of the extrusion ingot is 530°C, the temperature of the extrusion cylinder is 460°C, the temperature of the mold is 490°C, the speed of the extrusion rod is 3mm / s, and the outlet temperature of the extruded material is 545°C), quenched online , Artificial aging after straightening (175℃×8h).

Embodiment 3

[0038]Semi-continuous cast rod: diameter 178mm, cast rod composition in terms of mass percentage: Mg: 0.96wt%, Si: 0.95wt%, Cu: 0.65wt%, Mn: 0.05wt%, Cr: 0.03wt%, Fe: 0.16 wt%, Zn: 0.11wt%, Ti: 0.03wt%, Zr: 0.003wt%, and the balance is Al.

[0039] Homogenization heat treatment for alloy cast rods: from room temperature to 535°C at a rate of 75°C / h, and keep it for 12 hours, then raise it to 550°C at a rate of 10°C / h, keep it for 22 hours, and then heat it at 160°C / h Fast cool down. Extrude the material (the heating temperature of the extrusion ingot is 520°C, the temperature of the extrusion barrel is 460°C, the temperature of the mold is 490°C, the speed of the extrusion rod is 3mm / s, and the outlet temperature of the extruded material is 550°C), online quenching , Artificial aging after straightening (175℃×8h).

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Abstract

The invention relates to a 6XXX aluminum alloy and a machining method thereof. The alloy comprises the following components: 0.7-1.3 wt% of Mg, 0.7-1.3 wt% of Si, 0.5-1.2 wt% of Cu, Mn not more than 0.10 wt%, Cr not more than 0.10 wt%, Zr not more than 0.10 wt%, Ti not more than 0.10 wt%, Zn not more than 0.50 wt%, Fe not more than 0.20 wt%, and the balance of Al and inevitable impurities. The machining process of the aluminum alloy comprises the following steps: firstly, a cast rod is cast, is uniformly heated from room temperature to 500-540 DEG C with the heating speed of 20-300 DEG C / h for keeping 10-20 hours, is heated to 545-570 DEG C with the speed of 10-100 DEG C / h for keeping 6-30 hours, and is quickly cooled; the material is extruded after preheating, is cooled in water online, is quenched, and is straightened; and finally, the artificial aging is performed. As the content of elements in the 6XXX aluminum alloy is reasonably adjusted, the material both has higher strength and better anodic oxidization effect; and the alloy material is an ideal material for manufacturing an outer part of an electronic product, and is broad in market application prospect.

Description

technical field [0001] The invention relates to a 6XXX series aluminum alloy, in particular to a high-strength aluminum alloy for appearance parts of electronic products and a processing method thereof, belonging to the technical field of nonferrous metals. Background technique [0002] 6XXX series aluminum alloys (such as 6063, 6061) are widely used in the manufacture of electronic product components due to their light weight, good heat dissipation, and good anodic oxidation performance. Among them, although the yield strength (~220MPa) of 6063 aluminum alloy is lower than that of 6061 (~280MPa), the anodic oxidation performance of the former is better than that of the latter. Therefore, 6063 alloy is used in the manufacture of high-end electronic product components that require more stringent anodizing effects. [0003] The strength and anodic oxidation performance of the material are determined by the alloy composition, but the prior art (such as CN103131904A, US4589932,...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C21/08C22C21/16C22C21/18C22F1/043C22F1/047C22F1/05C22F1/057
Inventor 刘成钟皓赵健熊明华杨达彬张道谢朝晖
Owner 苏州中色研达金属技术有限公司
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