6XXX-series aluminum alloy and preparation method thereof

A technology of aluminum alloy and intermediate alloy, applied in the field of metal alloys

Active Publication Date: 2019-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, no one has done research on improving the performance of aluminum alloys by adding other metal elements and matching heat treatment to 6XXX series aluminum alloys

Method used

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  • 6XXX-series aluminum alloy and preparation method thereof
  • 6XXX-series aluminum alloy and preparation method thereof
  • 6XXX-series aluminum alloy and preparation method thereof

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preparation example Construction

[0037] The present invention also provides a preparation method for the above-mentioned 6XXX series aluminum alloy, comprising the following steps:

[0038] (1) Weigh pure aluminum ingots, pure magnesium ingots, aluminum-silicon master alloys, aluminum-copper master alloys, aluminum-manganese master alloys, aluminum-chromium master alloys, aluminum-yttrium master alloys, aluminum-zirconium master alloys, and Master alloy, aluminum strontium master alloy;

[0039] (2) smelting the raw materials in the step (1) with a refining agent, a covering agent and a refining agent to obtain an aluminum alloy melting solution;

[0040] (3) Perform casting, annealing, extrusion, solution treatment and aging treatment on the molten aluminum alloy obtained in the step (2) in sequence to obtain the 6XXX series aluminum alloy.

[0041] The present invention weighs pure aluminum ingots, pure magnesium ingots, aluminum-silicon master alloys, aluminum-copper master alloys, aluminum-manganese master...

Embodiment 1

[0056] A 6XXX series aluminum alloy prepared from the following elemental components in weight percent: Mg 0.92%, Si 2.0%, Cu 0.3%, Mn 0.4%, Cr 0.1%, Y 0.25%, Zr 0.15%, Sr 0.10%, Ti 0.02%, Zn 0.1%, Fe 0.2%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, the balance is Al.

[0057] The preparation method comprises the following steps:

[0058] (1) Weigh pure aluminum ingots, pure magnesium ingots, aluminum-silicon master alloys, aluminum-copper master alloys, aluminum-manganese master alloys, aluminum-chromium master alloys, aluminum-yttrium master alloys, and aluminum-zirconium master alloys according to the weight percentages of the above elements , Al-Sr master alloy;

[0059] (2) After melting the pure aluminum ingot at 780°C, add aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-chromium master alloy, aluminum-yttrium master alloy, aluminum-zirconium master alloy, aluminum-strontium master alloy, covering agent and r...

Embodiment 2

[0067] A 6XXX series aluminum alloy prepared from the following elemental components in weight percent: Mg 0.90%, Si 2.2%, Cu 0.3%, Mn 0.4%, Cr 0.12%, Y 0.27%, Zr 0.15%, Sr 0.10%, Ti 0.03%, Zn 0.09%, Fe 0.17%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, the balance is Al.

[0068] The preparation method comprises the following steps:

[0069] (1) Weigh pure aluminum ingots, pure magnesium ingots, aluminum-silicon master alloys, aluminum-copper master alloys, aluminum-manganese master alloys, aluminum-chromium master alloys, aluminum-yttrium master alloys, and aluminum-zirconium master alloys according to the weight percentages of the above elements , Al-Sr master alloy;

[0070] (2) After melting the pure aluminum ingot at 780°C, add aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-chromium master alloy, aluminum-yttrium master alloy, aluminum-zirconium master alloy, aluminum-strontium master alloy, covering agent an...

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Abstract

The invention provides 6XXX-series aluminum alloy, and belongs to the technical field of metal alloy. The 6XXX-series aluminum alloy is prepared from the following element components in percentages byweight: 0.8-1.5% of Mg, 1.5-3.0% of Si, 0.2-0.5% of Cu, 0.2-0.5% of Mn, 0.1-0.15% of Cr, 0.15-0.4% of Y, 0.1-0.3% of Zr, 0.05-0.15% of Sr, 0.01-0.04% of Ti, less than or equal to 0.1% of Zn, less than or equal to 0.5% of Fe, less than or equal to 0.05% of single impurities, less than or equal to 0.15% of total impurities and the balance of Al. By an as-cast structure of yttrium-zirconium refinedaluminum alloy, fine grains can be strengthened; and by excessive Si, the hardness and strength of the aluminum alloy are improved. From embodiments, the hardness of the aluminum alloy is 129 HBW, thetensile strength is 411 MPa, the yield strength is 348 MPa, and the ductility is 15%.

Description

technical field [0001] The invention relates to the technical field of metal alloys, in particular to a 6XXX series aluminum alloy and a preparation method thereof. Background technique [0002] 6XXX series aluminum alloys are age-strengthened aluminum alloys with low density, medium strength, good welding and formability, etc. They are widely used as structural parts in aerospace, automobiles, high-speed rail, construction and other fields. [0003] It is well known that the properties of 6XXX alloys are affected by the precipitation of the metastable β" phase of the stable phase β phase, while the precipitation of the metastable β" phase of the stable β phase in aluminum alloys is mainly determined by the heat treatment process. Therefore, in order to improve the comprehensive mechanical properties of 6XXX series aluminum alloys, scientific and technical personnel generally focus on the heat treatment steps of aluminum alloys, such as using various heat treatment methods t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22F1/043
CPCC22C1/026C22C1/03C22C21/02C22F1/043
Inventor 姜锋张贵钊童蒙蒙
Owner CENT SOUTH UNIV
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