Extrusion type aluminium alloy

An aluminum alloy, extruded technology, applied in the field of aluminum alloy, can solve the problem that welding performance and high strength are difficult to match

Active Publication Date: 2013-08-07
浙江极铝新材料有限公司
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide an extruded aluminum alloy with both high strength and excellent welding p

Method used

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  • Extrusion type aluminium alloy
  • Extrusion type aluminium alloy
  • Extrusion type aluminium alloy

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Embodiment

[0023] Alloy composition (by weight percentage): Zn5.0%; Mg2.0%; Mn0.6%; Cu0.4%; Cr0.3%; Zr0.1%; Sc0.03%; Fe≤0.2%; Si≤ 0.1%; the balance is Al; pure Al, pure Mg, pure Zn, pure Cu, Al-10wt.%Mn, Al-5wt.%Cr, Al-2wt.%Sc, and Al-5wt are obtained according to the above ingredients .%Zr is used as raw material, wherein the purity of pure Al, pure Mg, pure Zn, and pure Cu is ≥99.99wt.%. The prepared raw materials are alloyed in a 10-ton melting furnace, and ingots are obtained after semi-continuous casting. The furnace temperature is 728°C, the furnace mouth temperature is 709°C, the filter box inlet temperature is 701°C, the platform inlet temperature is 681°C, and the platform end temperature is 663°C; the casting speed is 25-35mm / min, and the cooling water flow rate is 20-30m3 / h, the water temperature at the cooling water outlet is 22°C. After the ingot is cooled, it is homogenized at 460°C for 24 hours under a protective atmosphere, and then extruded. The forming pattern is divide...

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Abstract

The invention provides an extrusion type aluminium alloy which belongs to the technical field of aluminium alloy preparation. The aluminium alloy comprises the following components by mass percent: 4.0-5.5% of Zn, 1.0-2.0% of Mg, 0.6-0.8% of Mn, 0.3-0.8% of Cu, 0.3-0.5% of Cr, 0.05-0.3% of Zr, 0.03-0.1% of rare earth element, no more than 0.3% of unavoidable impurity elements in total and the balance of aluminium. The aluminium alloy has the tensile strength of 396.17-540.03MPa and the yield strength of 303.61-480.13MPa at room temperature; and the aluminium alloy after fusion welding has the tensile strength of 389.17-530.03MPa and the yield strength of 292.61-460.13MPa, and the constituents of welding wires and matrixes are consistent in a welding process. The aluminium alloy can be used for solving a problem that the welding performance and high strength of the conventional aluminium alloy is difficult to match. The aluminium alloy is simple in operation and convenient in industrial production.

Description

technical field [0001] The invention relates to an aluminum alloy; in particular to an extruded aluminum alloy. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. With the rapid development of science and technology and industrial economy in recent years, the demand for welded structural parts of aluminum alloys is increasing, and the research on the weldability of aluminum alloys is also in-depth. For a long time, there has been a very urgent demand for weldable aluminum alloys in the aerospace field. Traditional 7XXX series weldable aluminum alloys often have low strength, while aluminum alloys with a strength higher than 500MPa are difficult to weld. The composition of the alloy is a major factor affecting the welding performance and strength of the alloy. The 7A52 aluminum alloy is ...

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Application Information

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IPC IPC(8): C22C21/10
Inventor 姜锋
Owner 浙江极铝新材料有限公司
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