Al-Mg-Si-Cu alloy and preparation method and application thereof

A technology of alloys and alloy materials, applied in the field of Al-Mg-Si-Cu alloys and their preparation, can solve the problems of limited wide application of Al-Cu alloys, scratches on the surface of workpieces, corrosion of grain boundaries, etc., and achieve excellent anodic oxidation performance , good machinability, good cutting performance

Active Publication Date: 2017-05-31
中山瑞泰铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional Al-Mg-Si(-Cu) alloys are difficult to break chips. During the machining process, the tool will be wound and scratches on the surface of the workpiece, which will affect the efficiency and quality.
However, Al-Cu alloy, because it contains low melting point elements such as lead and bismuth, is beneficial to cutting chips, but Al-Cu alloy is often accompanied by grain boundary corrosion due to difficulty in extrusion molding, and contains environmental protection restricted substances, which limits Wide application of Al-Cu alloy

Method used

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  • Al-Mg-Si-Cu alloy and preparation method and application thereof
  • Al-Mg-Si-Cu alloy and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The raw materials are as follows:

[0061] Aluminum ingot: use the aluminum ingot with the brand name Al99.7, the mass percentage of Al in the aluminum ingot is more than 99.70%, and the mass percentage of Fe is 0.12%, which meets the standard GB / T 1196-2008 "Aluminum Ingots for Remelting";

[0062] Magnesium ingots: Magnesium ingots with the brand Mg9990 are used, and the mass percentage of Mg in the magnesium ingots is more than 99.9%, which meets the standard GB / T 3499-2003 "Primary Magnesium Ingots";

[0063] Zinc ingots: Zn9995 zinc ingots are used, and the mass percentage of Zn in the zinc ingots is more than 99.95%, which meets the standard GB / T470-1997 "Zinc Ingots";

[0064] Alloy additives (aluminum-silicon, aluminum-manganese, aluminum-chromium, aluminum-copper, aluminum-iron): AlSi12, AlMn10, AlCr3, AlCu40 and AlFe20 master alloys are used respectively, and the quality meets the YS / T282-2000 standard;

[0065] Refining agent: the brand is PROMAG RI granular...

Embodiment 2

[0090] 1. Manufacturing method of aluminum round ingot:

[0091] According to the chemical composition of Al-Mg-Si-Cu alloy in terms of mass percentage: Si is 0.79%, Mg is 1.18%, Fe is 0.45%, Mn is 0.11%, Cr is 0.12%, Zn is 0.15%, Cu is 0.21% %, Ti≤0.10%, and the balance is Al for material preparation, and the same process as in Example 1 is used to produce an Al-Mg-Si-Cu alloy round ingot.

[0092] 2. Manufacturing methods of aluminum extrusion profiles, pipes and rods:

[0093] Take a round pipe with an outer diameter of 33mm and a wall thickness of 5mm as an example:

[0094] (1) Cut the alloy round ingot (aluminum rod) obtained above into 500mm long, and use a five-zone slow-speed aluminum rod heating furnace. ) temperature is 540°C, the temperature of the third zone (intermediate heat preservation zone) is 560°C, the temperature of the fourth zone (intermediate heat preservation zone) is 540°C, the temperature of the fifth zone (exit zone) is 480°C, and it is heated for...

Embodiment 3

[0100] 1. Manufacturing method of aluminum round ingot:

[0101] According to the chemical composition of Al-Mg-Si-Cu alloy in terms of mass percentage: Si is 0.622%, Mg is 1.03%, Fe is 0.35%, Mn is 0.13%, Cr is 0.15%, Zn is 0.13%, Cu is 0.20 %, Ti≤0.10%, and the balance is Al for material preparation, and the same process as in Example 1 is used to produce an Al-Mg-Si-Cu alloy round ingot.

[0102] 2. Manufacturing methods of aluminum extrusion profiles, pipes and rods:

[0103] Take a round pipe with an outer diameter of 33mm and a wall thickness of 5mm as an example:

[0104](1) Cut the alloy round ingot (aluminum rod) obtained above into a length of 650 mm, use a five-zone slow-speed aluminum rod heating furnace, the temperature of the first zone (entry preheating zone) is 500 ° C, and the second zone (intermediate heat preservation zone) ) temperature is 540°C, the temperature in the third zone (intermediate heat preservation zone) is 560°C, the temperature in the fourt...

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Abstract

The invention discloses Al-Mg-Si-Cu alloy and a preparation method and application thereof. The Al-Mg-Si-Cu alloy comprises, by mass, 0.6%-0.8% of Si, 1.0%-1.2% of Mg, 0.25%-0.5% of Fe, 0.2%-0.4% of Cu, 0.1%-0.15% of Mn, 0.1%-0.2% of Cr, 0.10%-0.20% of Zn, 0-0.10% of Ti, smaller than 0.15% of other impurities, and the balance Al. The Al-Mg-Si-Cu alloy has high strength and excellent anodic oxidation performance, meanwhile also has great chip cutting performance and can be used for manufacturing industrial aluminum alloy materials, such as electronic equipment structural connecting pieces, with high-quality requirements for high strength, decorative surfaces and a large quantity of CNC processing.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials and its manufacture, and in particular relates to an Al-Mg-Si-Cu alloy and its preparation method and application. Background technique [0002] Al-Mg-Si(-Cu) alloy is currently the most widely used alloy, accounting for more than 60% of the total aluminum application. The Al-Mg-Si(-Cu) alloy used in some parts needs to be processed into the required shape through a large number of CNC. Conventional Al-Mg-Si(-Cu) alloys are difficult to break chips. During the machining process, the tool will be wound and scratches on the surface of the workpiece, which will affect the efficiency and quality. Al-Cu alloy, because it contains low melting point elements such as lead and bismuth, is beneficial to cutting chip breaking, but Al-Cu alloy is often accompanied by grain boundary corrosion due to difficulty in extrusion molding, and contains environmental protection restricted substances, which limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047
CPCC22C1/026C22C1/03C22C1/06C22C21/08C22F1/002C22F1/047
Inventor 李清李建湘丁小理刘经发周旺
Owner 中山瑞泰铝业有限公司
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