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A 6××× series aluminum alloy aging heat treatment process

An aging heat treatment, aluminum alloy technology, applied in the field of material processing, can solve the problems of small scope, high natural gas consumption and power consumption, long preparation time, etc., to achieve the effect of large strength and elongation, reduced power consumption, and large number density

Active Publication Date: 2020-12-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But mainly for 6063-T5, the scope of application is small, the preparation time required for natural aging to obtain a certain hardness is long, and the process is cumbersome due to the existence of a second-stage aging operation. At the same time, the extremely short holding time in the second-stage aging The temperature uniformity and accuracy of the aging furnace are extremely high, because the actual temperature of the profile during the heating process has a certain hysteresis relative to the control instrument of the aging furnace, so the applicability of this method is poor
[0009] The currently visible aging process for 6××× series aluminum alloys is mainly to hold at a certain temperature between 170-200°C for 3-10 hours at a constant temperature, or to keep at a low temperature for a long time or to perform secondary and tertiary aging. The required heat treatment is common. Long time, high consumption of natural gas and electricity, or cumbersome multi-stage aging operations, and high requirements for equipment

Method used

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  • A 6××× series aluminum alloy aging heat treatment process
  • A 6××× series aluminum alloy aging heat treatment process
  • A 6××× series aluminum alloy aging heat treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A 6××× series aluminum alloy material, the alloy material includes the following chemical components and their respective mass percentages: Mg 0.55-0.62%, Si 0.38-0.42%, Cu<0.005%, Mn<0.005%, Cr< 0.005%, Zn<0.005%, Ti 0.015-0.02%, in line with the composition range of 6063 in the national standard GB / T3190-2008.

[0044] The aluminum alloy materials configured according to the above-mentioned composition and percentage content are successively subjected to melting and casting, homogenization annealing, extrusion or rolling, solid solution or online quenching and aging heat treatment, among which the T6 aging heat treatment process is: the online quenching temperature is 535 ℃ and use "water spray + strong wind" to cool to the surface temperature below 150 ℃. The aluminum alloy profiles treated are heated to 190 ℃ in the aging furnace. After the temperature is 160°C, it is taken out of the furnace (in this aging furnace, the cooling rate is 8°C / h), and then the aluminum ...

Embodiment 2

[0046]A 6××× series aluminum alloy material, the alloy material includes the following chemical components and their respective mass percentages: Mg 0.55-0.62%, Si 0.38-0.42%, Cu<0.005%, Mn<0.005%, Cr< 0.005%, Zn<0.005%, Ti 0.015-0.02%, in line with the composition range of 6063 in the national standard GB / T3190-2008.

[0047] The aluminum alloy materials configured according to the above-mentioned composition and percentage content are successively subjected to melting and casting, homogenization annealing, extrusion or rolling, solid solution or online quenching and aging heat treatment, among which the T6 aging heat treatment process is: the online quenching temperature is 535 ℃ and use "water spray + strong wind" to cool the aluminum profile to a surface temperature below 150 ℃ (consistent with the quenching and cooling speed in Example 1) in the aging furnace and heat it to 190 ℃, after holding for 2 hours, control the aluminum alloy in the aging furnace The cooling rate ...

Embodiment 3

[0058] A 6××× series aluminum alloy material, the alloy material includes the following chemical components and their respective mass percentages: Mg 0.55-0.62%, Si 0.38-0.42%, Cu<0.005%, Mn<0.005%, Cr< 0.005%, Zn<0.005%, Ti 0.015-0.02%, in line with the composition range of 6063 in the national standard GB / T3190-2008.

[0059] The aluminum alloy materials configured according to the above-mentioned composition and percentage content are successively subjected to melting and casting, homogenization annealing, extrusion or rolling, solid solution or online quenching and aging heat treatment, wherein the T5 aging heat treatment process is: the online quenching temperature is 535 ℃ and use "water spray + strong wind" to cool to below 150 ℃ (consistent with the quenching and cooling speed of Example 1) in the aging furnace and heat to 200 ℃, after 0h of heat preservation, turn off the burner and the circulating fan (the aging The measured natural cooling rate of the furnace is 10°...

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Abstract

The invention discloses an aging heat treatment technology of 6xxx series aluminum alloys. The technology comprises the following steps: heating aluminum alloys through an aging furnace until the temperature is 180-250 DEG C after solution treatment or online quenching treatment; maintaining the temperature for 0-4h; cooling at the speed of 5-80 DEG C per hour until the temperature is not beyond 160 DEG C; discharging from the furnace; and cooling until room temperature is reached. Compared with traditional aging heat treatment, the technology has the advantages that the aluminum alloys are subjected to temperature maintaining within a short time and even are directly cooled without temperature maintaining during aging heat treatment, so that the electricity consumption and the natural gasconsumption can be effectively decreased; the comprehensive cost of aging is decreased; and moreover, the purposes of saving the equipment running time, decreasing the equipment abrasion and improving the production efficiency can be achieved.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a 6××× series aluminum alloy aging heat treatment process. Background technique [0002] The 6××× series aluminum alloys have been widely used in engineering construction, rail transit, automobile, electric power, machinery manufacturing and other fields due to their characteristics of medium strength, no stress corrosion, good processing performance and welding performance, and excellent oxidation coloring performance. Wide range of applications. The 6××× series aluminum alloy is a kind of aluminum alloy that can be strengthened by heat treatment. The principle of aging is to heat the supersaturated solid solution aluminum alloy after solid solution or online quenching to a temperature between 170-200°C and keep it warm to achieve Mg , Si, Cu and other alloying elements are precipitated to form dispersed Mg 2 Si precipitates, the more the number of prec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22F1/047
CPCC22C21/08C22F1/002C22F1/047
Inventor 叶凌英柯彬
Owner CENT SOUTH UNIV
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