Aluminum alloy and casting method thereof, and method for extruding profile
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A technology for aluminum alloys and aluminum profiles, applied in the field of aluminum alloys, can solve problems such as difficulty in extrusion molding, difficulty in producing shaped hollow profiles, and restricting applications.
Active Publication Date: 2013-04-10
SNTO TECH GRP
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However, its relatively low strength severely restricts the application of 6-series alloys in some profile members with high strength requirements.
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Embodiment 1
[0030] A high-strength aluminum alloy, its composition and weight percentage are: Mg: 0.5%, Si: 0.26%, Cu: 0.6%, Mn: 0.1%, Cr: 0.01%, Ti: 0.01%, Al: 95.82% .
[0031] In the present invention, the yield strength reaches 350MPa, the tensile strength reaches 400MPa, and the yield strength reaches 11%.
Embodiment 2
[0033] A high-strength aluminum alloy, its composition and weight percentage are: Mg: 0.7%, Si: 0.41%, Cu: 75%, Mn: 0.2%, Cr: 0.04%, Ti: 0.03%, Al: 97.87% .
[0034] In the present invention, the yield strength reaches 353MPa, the tensile strength reaches 404MPa, and the yield strength reaches 10.5%.
Embodiment 3
[0036] A high-strength aluminum alloy, its composition and weight percentage are: Mg: 0.8%, Si: 0.47%, Cu: 0.68%, Mn: 0.4%, Cr: 0.07%, Ti: 0.05%, Al: 97.53% .
[0037] In the present invention, the yield strength reaches 355MPa, the tensile strength reaches 410MPa, and the yield strength reaches 13%.
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Abstract
The invention belongs to the technical field of aluminum alloys, and particularly relates to an aluminum alloy, a method for casting a cast ingot from the aluminum alloy, and a method for extruding a profile from the cast ingot. The invention aims to provide an aluminum alloy which has high strength and favorable processability. The high-strength aluminum alloy provided by the invention comprises the following components in percentage by weight: 0.5-1.5% of Mg, 0.25-1.2% of Si, 0.6-1.2% of Cu, 0.1-0.8% of Mn, 0.01-0.2% of Cr, 0.01-0.15% of Ti and the balance of Al. The yield strength of the hollow profile of the alloy in the T6 state (after completing aging treatment) is up to 350 MPa, the tensile strength is up to 400 MPa, and the plasticity is higher than 10%; and the hollow profile has favorable welding performance and fatigue resistance.
Description
technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an aluminum alloy, a method for casting an ingot using it, and a method for extruding a profile with the ingot. Background technique [0002] The 6-series aluminum alloy has the characteristics of medium strength, easy extrusion and good welding performance, and is widely used in vehicle manufacturing, transportation, construction and other industries. However, its relatively low strength severely restricts the application of 6-series alloys in some profile members with high strength requirements. Although the 2-series and 7-series aluminum alloys have high strength, they are not easy to be extruded, and it is difficult to produce some hollow profiles with complex shapes. Therefore, it is of great significance to develop a new alloy with higher strength than the existing 6-series alloys and good extrusion performance and its corresponding extrusion process. ...
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