Aluminum alloy material and heat treatment technique thereof

A technology of homogenized heat treatment of aluminum alloy materials, applied in the field of material processing, can solve problems such as inability to balance strength, toughness and corrosion resistance

Active Publication Date: 2013-06-05
佛山市三水凤铝铝业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an aluminum alloy material and its heat treatment process, aiming at solving the problem that the current aluminum alloy material cannot take into account the strength, toughness and corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] An aluminum alloy material, which comprises the following components by mass percentage:

[0055] Si 1%;

[0056] Cu 0.5%;

[0057] Mn 0.4%;

[0058] Mg 1.1%;

[0059] Cr 0.15%;

[0060] Zr 0.1%;

[0061] Fe 0.3%;

[0062] Zn 0.1%;

[0063] Ti 0.05%;

[0064] Al 96%

[0065] Impurities 0.03%.

[0066]The aluminum alloy material configured according to the above composition was obtained by semi-continuous casting to obtain the original ingot with a diameter of 165 mm, and then the aluminum alloy ingot was kept at 570 ° C for 12 h for homogenization treatment. Then, the homogenized heat-treated aluminum alloy ingot was extruded on a 1800T extruder with an extrusion coefficient of 35 to obtain an aluminum alloy round bar with a diameter of 28 mm. After the extruded aluminum alloy material is kept at 570°C for 1 hour, it is water-cooled and quenched. The cooling water temperature is not greater than 35°C, and the transfer time is less than 30S. The aluminum alloy...

Embodiment 2

[0068] An aluminum alloy material, which comprises the following components by mass percentage:

[0069] Si 0.8%;

[0070] Cu 0.7%;

[0071] Mn 0.6%;

[0072] Mg 0.8%;

[0073] Cr 0.05%;

[0074] Zr 0.05%;

[0075] Fe 0.1%;

[0076] Zn 0.1%;

[0077] Ti 0.05%;

[0078] Al 96.7%

[0079] Impurities 0.05%.

[0080] The aluminum alloy material configured according to the above composition was obtained by semi-continuous casting to obtain the original ingot with a diameter of 165 mm, and then the aluminum alloy ingot was kept at 585 ° C for 8 h for homogenization treatment. Then, the homogenized heat-treated aluminum alloy ingot was extruded on a 1800T extruder with an extrusion coefficient of 35 to obtain an aluminum alloy round bar with a diameter of 28 mm. After the extruded aluminum alloy material is kept at 575°C for 1 hour, it is water-cooled and quenched. The cooling water temperature is not greater than 35°C, and the transfer time is less than 30S. The aluminum ...

Embodiment 3

[0082] An aluminum alloy material, which comprises the following components by mass percentage:

[0083] Si 1.3%;

[0084] Cu 0.7%;

[0085] Mn 0.6%;

[0086] Mg 1.4%;

[0087] Cr 0.25%;

[0088] Zr 0.2%;

[0089] Fe 0.4%;

[0090] Zn 0.15%;

[0091] Ti 0.05%;

[0092] Al 94.9%

[0093] Impurities 0.05%.

[0094] The aluminum alloy material configured according to the above composition was obtained by semi-continuous casting to obtain an original ingot with a diameter of 165mm, and then the aluminum alloy ingot was kept at a temperature of 540°C for 16 h for homogenization treatment. Then, the homogenized heat-treated aluminum alloy material ingot is water-cooled, and then extruded on a 1800T extruder with an extrusion coefficient of 35 to obtain an aluminum alloy round rod with a diameter of 28 mm. The extruded aluminum alloy material is kept at 530°C for 1 hour and then water-cooled and quenched. The cooling water temperature is not greater than 35°C, and the trans...

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Abstract

The invention discloses an aluminum alloy material and a heat treatment technique thereof. The aluminum alloy material comprises the following components in percentage by mass: 0.8-1.3% of Si, 0.3-0.7% of Cu, 0.20-0.60% of Mn, 0.8-1.4% of Mg, 0.05-0.25% of Cr, 0.05-0.2% of Zr, at most 0.5% of Fe, at most 0.2% of Zn, at most 0.1% of Ti, and the balance of Al and impurities. According to the aluminum alloy material aluminum alloy and the heat treatment technique thereof, on the basis of the traditional 6xxx alloy, microelements are added to optimize the content of principal elements; meanwhile, the heat treatment technique is optimized to further enhance the strength and toughness of the aluminum alloy material, thereby implementing organic combination of strength, toughness and corrosion resistance; and the aluminum alloy material can be used instead of 2xxx and 7xxx aluminum alloys in some fields. Thus, the product has favorable application prospects in the fields of aerospace, civil automobiles and the like.

Description

technical field [0001] The invention relates to the field of material processing, in particular to an aluminum alloy material and a heat treatment process thereof. Background technique [0002] At present, the high-strength aluminum alloys widely used in the aerospace field are mainly 7xxx series Al-Zn-Mg-Cu and 2xxx series Al-Cu-Mg aluminum alloys. Although the 7xxx series aluminum alloys have high strength, they have obvious stress corrosion cracking tendency, so the application potential and service life of their components are greatly limited. The strength of 2xxx series aluminum alloys is lower than that of 7xxx series aluminum alloys, but the heat resistance, fatigue properties, especially fatigue crack growth resistance are better than those of 7xxx series aluminum alloys; however, the corrosion resistance of 2xxx series aluminum alloys is still relatively poor, which directly affects The performance of aluminum alloy structural parts shortens its service life. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
Inventor 黄志其陈慧胡权李慎兰葛杰蒋福利刘志铭吴小源
Owner 佛山市三水凤铝铝业有限公司
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