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al-mg alloy and its preparation method

An alloy and aluminum alloy technology, which is applied in the field of Al-Mg alloy and its preparation, can solve the problems that the special-shaped extruded material cannot be subjected to cold work hardening treatment, it is difficult to meet the strength requirements, and the strength is low. Weld hot crack tendency, enhancement and effect of weld strength

Active Publication Date: 2019-09-27
GUANGDONG HOSHION IND ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this kind of alloy does not use quenching and aging methods to improve the strength of the alloy. Its products are generally annealed or cold hardened. In the actual production process, extrusion materials are often cold-worked to improve material strength, but special-shaped extrusion materials It cannot be hardened by cold work, and at the same time requires a certain strength. However, without cold working, the strength of this type of Al-Mg alloy is low, and it is difficult to meet the strength requirements required for product applications, and its application is limited.

Method used

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Examples

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Embodiment 1

[0032] The Al-Mg alloy described in this embodiment, by mass percentage, includes the following components:

[0033] Si 0.44%, Mg 2.1%, Mn 0.05%, Cr 0.15%, Cu 0.04%, and the balance is Al; among them, the control impurities include Fe≤0.12%, Ti≤0.10%, Zn≤0.05, and the total amount of other impurities < 0.15%.

[0034] The raw materials for preparing the above-mentioned aluminum alloy extruded rods are as follows:

[0035] Aluminum ingots: Aluminum ingots with the brand name Al99.7 are used, and the mass percentage of Al in the aluminum ingots is more than 99.70%, which meets the standard GB / T 1196-2008 "Aluminum Ingots for Remelting";

[0036] Magnesium ingots: Magnesium ingots with the brand Mg9990 are used, and the mass percentage of Mg in the magnesium ingots is more than 99.9%, which meets the standard GB / T 3499-2003 "Primary Magnesium Ingots";

[0037] Aluminum-silicon alloy: crystalline silicon and aluminum-silicon alloy are used, and the mass percentage of aluminum-si...

Embodiment 2

[0059] The Al-Mg alloy described in this embodiment includes the following components in terms of mass percentage: 0.53% Si, 2.4% Mg, 0.05% Mn, 0.15% Cr, 0.14% Cu, and the balance is Al; Among the impurities, Fe≤0.12%, Ti≤0.10%, Zn≤0.05, and the total amount of other impurities <0.15%.

[0060] The raw materials used in this embodiment and the specific process steps are the same as in Example 1.

Embodiment 3

[0062] The composition of the Al-Mg alloy described in this embodiment also includes 0.0001%-0.005% of Be, and the rest of the components are the same as in Example 2, and the raw materials and specific process steps used are also the same as in Example 2.

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Abstract

The invention provides Al-Mg alloy. The Al-Mg alloy comprises, by weight, 0.4-0.7% of Si, 2.0-3.0% of Mg, 0.05-0.35% of Cr, less than or equal to 0.30% of Cu, less than or equal to 0.15% of Mn, less than or equal to 0.20% of Fe, less than or equal to 0.10% of Ti, less than or equal to 0.05% of Zn, less than 0.15% of other impurities and the balance Al, or the Al-Mg alloy can further comprise a trace amount of Be elements. Through the reasonable proportion of alloy components, the high-strength Al-Mg alloy can be obtained without cold working treatment, and the Al-Mg alloy has good mechanical performance compared with classical 5052 series.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials and its manufacture, and in particular relates to an Al-Mg alloy and a preparation method thereof. Background technique [0002] Aluminum-magnesium alloys have high corrosion resistance, good weldability and good shape, and belong to alloys that cannot be strengthened by heat treatment. At different temperatures, although magnesium has a large solid solubility change in aluminum, the alloy has no obvious aging strengthening effect, because the new phase β′ formed during quenching and aging does not co-exist with the matrix. grid strengthening effect. Therefore, this kind of alloy does not use quenching and aging methods to improve the strength of the alloy. Its products are generally annealed or cold hardened. In the actual production process, extrusion materials are often cold-worked to improve material strength, but special-shaped extrusion materials Cold work hardening cannot be perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22F1/047
Inventor 罗杰李建湘刘志成刘经发丁小理
Owner GUANGDONG HOSHION IND ALUMINUM CO LTD
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