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Aluminum alloy and casting method thereof, and method for extruding profile

A technology for extruding profiles and aluminum alloys, which is applied in the field of aluminum alloys, and can solve problems such as restricting applications, difficulty in extruding, and difficulty in producing hollow profiles.

Active Publication Date: 2014-01-15
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its relatively low strength severely restricts the application of 6-series alloys in some profile members with high strength requirements.
Although 2-series and 7-series aluminum alloys have high strength, they are not easy to be extruded, and it is difficult to produce hollow profiles with complex shapes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for producing ingots from high-strength aluminum alloys, comprising the following steps: providing an aluminum alloy whose components and weight percentages are: Mg: 1%, Si: 0.67%, Cu: 0.8%, Mn: 0.3% , Cr: 0.09%, Ti: 0.06%, Al: 97.08%;

[0027] Add aluminum ingots and / or aluminum water into the melting furnace according to the composition and weight ratio of the aluminum alloy, heat and melt;

[0028] Add Mg, Si, Cu, Mn, Cr and Ti, and stir well;

[0029] When the melt temperature is 730°C, carry out the first powder spraying and refining, and remove the slag after standing for 20 minutes;

[0030] When the melt temperature in the melting furnace reaches 740°C, pour the melt into the holding furnace;

[0031] When the temperature of the melt in the holding furnace is 730°C, carry out the second powder spraying and refining, and remove the slag after standing for 20 minutes;

[0032] The melt in the holding furnace is degassed and filtered;

[0033] The ingo...

Embodiment 2

[0037] A method for producing ingots from high-strength aluminum alloys, comprising the following steps: providing an aluminum alloy whose components and weight percentages are: Mg: 1%, Si: 0.67%, Cu: 0.8%, Mn: 0.3% , Cr: 0.09%, Ti: 0.06%, Al: 97.08%;

[0038] Add aluminum ingots and / or aluminum water into the melting furnace according to the composition and weight ratio of the aluminum alloy, heat and melt;

[0039] Add Mg, Si, Cu, Mn, Cr and Ti, and stir well;

[0040] When the melt temperature is 750°C, carry out the first powder spraying and refining, and remove the slag after standing for 40 minutes;

[0041] When the melt temperature in the melting furnace reaches 770°C, pour the melt into the holding furnace;

[0042] When the melt temperature in the holding furnace is 750°C, carry out the second powder spraying and refining, and remove the slag after standing for 40 minutes;

[0043] The melt in the holding furnace is degassed and filtered;

[0044] The ingot is ca...

Embodiment 3

[0048] A method for producing ingots from high-strength aluminum alloys, comprising the following steps: providing an aluminum alloy whose components and weight percentages are: Mg: 1%, Si: 0.67%, Cu: 0.8%, Mn: 0.3% , Cr: 0.09%, Ti: 0.06%, Al: 97.08%;

[0049] Add aluminum ingots and / or aluminum water into the melting furnace according to the composition and weight ratio of the aluminum alloy, heat and melt;

[0050] Add Mg, Si, Cu, Mn, Cr and Ti, and stir well;

[0051] When the melt temperature is 740°C, carry out the first powder spraying and refining, and remove the slag after standing for 25 minutes;

[0052] When the melt temperature in the melting furnace reaches 750°C, pour the melt into the holding furnace;

[0053] When the melt temperature in the holding furnace is 740°C, carry out the second powder spraying and refining, and remove the slag after standing for 35 minutes;

[0054] The melt in the holding furnace is degassed and filtered;

[0055] The ingot is ca...

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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 a method for casting an aluminum alloy ingot 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. Contents of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/02C22C21/08C22C21/16C22F1/04C22F1/043C22F1/047C22F1/057
Inventor 不公告发明人
Owner SNTO TECH GRP
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