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Aluminium alloy section bar for structural engineering, and preparation method thereof

A technology of aluminum alloy profiles and structural engineering, applied in the field of aluminum alloys, can solve problems such as low quenching sensitivity, low production efficiency, and poor product quality, and achieve the goals of refined recrystallized grains, improved mechanical properties, and high thermal stability Effect

Active Publication Date: 2013-10-23
GUANGDONG WEIYE ALUMINUM FACTORY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to provide an aluminum alloy profile for structural engineering with high strength, good toughness, low quenching sensitivity and high cost performance in order to overcome the shortcomings of the prior art, such as low production efficiency and poor product quality.

Method used

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Examples

Experimental program
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Effect test

specific Embodiment 1

[0035] A method for preparing aluminum alloy profiles for structural engineering:

[0036] 1) Prepare the aluminum alloy of the present invention according to the conventional method, the weight percentage of each component is 100%, and the weight percentage is (sampled and analyzed in the casting flow plate for chemical composition): 0.50% magnesium, 0.65% silicon, 0.01% manganese, An aluminum alloy composition with 0.16% chromium, 0.005% titanium, 0.01% iron, 0.01% zinc, and 0.01% copper, and the balance is cast into an aluminum alloy ingot, and the balance is that the aluminum in the aluminum contains 0.08% impurities , and the impurities contained in the existing aluminum are the same, and the ingot is a cast rod with a diameter of Φ260mm.

[0037] 2) The aluminum alloy ingot is subjected to high-temperature homogenization treatment at 560°C, heated for 5 hours, then cooled by strong wind or water mist to 150°C, then moved to the atmosphere and continued to air-cool to roo...

specific Embodiment 2

[0042] A method for preparing aluminum alloy profiles for structural engineering:

[0043] 1) Prepare the alloy of the present invention according to conventional methods, and the percentage by weight is (sampling and analyzing chemical composition in the casting flow plate): 0.55% magnesium, 0.7% silicon, 0.1% manganese, 0.05% chromium, 0.007% titanium, 0.2% iron, 0.05% zinc, 0.05% copper, and the aluminum alloy composition whose balance is aluminum is cast into an aluminum alloy ingot. The ingot is a cast rod with a diameter of Φ260mm.

[0044] 2) The aluminum alloy ingot is subjected to high-temperature homogenization treatment at 565°C, heated for 7 hours, then cooled by strong wind or water mist to 150°C, then moved to the atmosphere and continued to air-cool to room temperature;

[0045] 3) Cut the cast ingot into extruded ingots according to the required length (take low-magnification and high-magnification samples), send them into the induction furnace and heat them q...

specific Embodiment 3

[0049] 1) Prepare the alloy of the present invention according to conventional methods, and the weight percentage is (sampling and analyzing chemical composition in the casting flow plate): 0.60% magnesium, 0.75% silicon, 0.2% manganese, 0.05% chromium, 0.009% titanium, 0.30% iron, 0.10% zinc, 0.10% copper, and the aluminum alloy composition whose balance is aluminum is cast into an aluminum alloy ingot, and the balance is that the aluminum in the aluminum contains 0.15% impurities, which are the same as those contained in existing aluminum, The ingot is a cast rod with a diameter of Φ260mm.

[0050] 2) The aluminum alloy ingot is subjected to high-temperature homogenization treatment at 570°C, heated for 10 hours, then cooled by strong wind or water mist to 150°C, then moved to the atmosphere and continued to air-cool to room temperature;

[0051] 3) Cut the cast ingot into extruded ingots according to the required length (take low-magnification and high-magnification samples...

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Abstract

The invention discloses an aluminium alloy section bar for structural engineering, and a preparation method thereof. The aluminium alloy section bar comprises the following compositions by weight percent: 0.50-0.60% of magnesium, 0.65-0.75% of silicon, 0-0.25% of manganese, 0-0.10% of chromium, 0.005-0.009% of titanium, 0-0.30% of iron, 0-0.10% of zinc, 0-0.10% of copper, and the balance aluminium. Compared with 6063 alloy and 6063A alloy, the aluminium alloy section bar of the invention has tensile strength of 290 MPa or more, yield strength of 240 MPa or more, and elongation at break of 8% or more. 6061 alloy is high in quench sensitivity, and quenching and water cooling must be employed for guarantee of obtaining demanded mechanical properties during production, and therefore the extruded aluminium section bar is serious in deformation; compared with 6061 alloy, the alloy material of the invention is smaller in quench sensitivity, and by using strong wind cooling or mist cooling, the demanded properties are obtained when the section bar is processed; and the aluminium alloy section bar of the invention is good in toughness, and has a pendulum impact value of 20 J / cm<2> or more.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and specifically relates to an aluminum alloy profile for structural engineering and a preparation method thereof. Background technique [0002] According to the requirements of the national standard GB50429-2007 "Code for Design of Aluminum Alloy Structures", the aluminum alloys currently used in aluminum alloy structures are 6063, 6063A and 6061 aluminum alloys. The main components of the three alloys are aluminum, magnesium, and silicon. Among them, 6061 Two auxiliary elements, copper and chromium, are also added to the alloy. 6063 and 6063A alloys have excellent extrusion processability and extrusion quenching performance, and can produce high-speed and mass-produced profiles with complex shapes, and the production cost is low, but the mechanical properties of the alloy are not high; 6061 alloy has medium strength, corrosion resistance, and weldability Such as excellent comprehensive...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02C22F1/043
Inventor 李伟萍
Owner GUANGDONG WEIYE ALUMINUM FACTORY GRP
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