Aluminum-magnesium-silicon-scandium-zirconium alloy and preparation method thereof

An aluminum-magnesium-silicon and zirconium alloy technology, which is applied in the field of aluminum-magnesium-silicon-scandium-zirconium alloys and its preparation, can solve problems such as difficulty in meeting design and use requirements, and achieves low alloying element content, inhibition of recrystallization and simple composition. Effect

Active Publication Date: 2022-02-25
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Application Information

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Problems solved by technology

With the development of the aerospace industry, the weight reduction and strength requirements of materials for the new generation of aerospace vehicles are increasing day by day, and the existing traditional aluminum-magnesium-silicon alloys are difficult to meet the design and use requirements.

Method used

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  • Aluminum-magnesium-silicon-scandium-zirconium alloy and preparation method thereof
  • Aluminum-magnesium-silicon-scandium-zirconium alloy and preparation method thereof
  • Aluminum-magnesium-silicon-scandium-zirconium alloy and preparation method thereof

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Embodiment

[0033] The chemical composition and weight percentage of the aluminum-magnesium-silicon-scandium-zirconium alloy are one of the following three ratios:

[0034] The first proportion: Mg 0.5%~1.1%, Si 0.4%~1.2%, Sc 0.02%~0.25%, impurities Cu≤0.1%, Fe≤0.35%, other impurities individually≤0.05%, total amount≤0.15% , the remainder is Al;

[0035] The second proportion: Mg 0.5%~1.1%, Si 0.4%~1.2%, Zr 0.04%~0.18%, impurities Cu≤0.1%, Fe≤0.35%, other impurities individually≤0.05%, total amount≤0.15% , the remainder is Al;

[0036] The third proportion: Mg 0.5%~1.1%, Si 0.4%~1.2%, Sc 0.02%~0.25%, Zr 0.04%~0.18% and 0.08%≤Zr+Sc≤0.40%, impurity Cu≤0.1% , Fe≤0.35%, other impurities individually≤0.05%, the total amount≤0.15%, and the balance is Al.

[0037] A φ320mm round ingot is prepared by the preparation method of the present invention, and the ingot composition is shown in Table 1.

[0038] Table 1 Ingot alloy composition weight percentage (%)

[0039]

[0040]

[0041] Af...

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Abstract

The invention relates to an aluminum-magnesium-silicon-scandium-zirconium alloy and a preparation method thereof, the aluminum-magnesium-silicon-scandium-zirconium alloy adopts an element Zr, an element Sc and a Zr / Sc composite microalloying scheme, so that a mixed crystal structure containing a certain component subcrystal texture is obtained, and the strength and plasticity comprehensive performance of the material is improved. In the microalloying scheme, 0.02%-0.25% of the element Sc is selected; 0.04%-0.18% of the element Zr is selected, and Zr+Sc is greater than 0.08% and less than or equal to 0.40% when the two are combined. The purpose is to obtain a mixed crystal structure containing a certain sub-grain texture and improve the comprehensive performance of the material. The novel aluminum-magnesium-silicon-scandium-zirconium alloy product produced by the method of the invention has excellent corrosion resistance and weldability. Compared with a traditional aluminum-magnesium-silicon alloy, the aluminum-magnesium-silicon alloy has high strength and welding softening resistance, the tensile strength and the yield strength are improved by 20%-36% and 30%-51% respectively, and the ductility is higher than 10%; the strength of a welded joint is 51%-54%, and the coefficient of the joint is increased to 0.9 level from 0.8 level. The material product can be used for structural members in the fields of aerospace, nuclear industry, transportation, ships, weapons and the like.

Description

technical field [0001] The invention relates to an aluminum-magnesium-silicon-scandium-zirconium alloy and a preparation method thereof, belonging to the technical field of metal material engineering. [0002] The new aluminum alloy products produced by this method have excellent corrosion resistance and weldability. Compared with traditional aluminum-magnesium-silicon alloys, they have higher strength and resistance to welding softening, and their tensile strength and yield strength are increased by 20% respectively. ~36% and 30%~51%, and the elongation is higher than 10%; the strength of the welded joint is 51%~54%, and the joint coefficient is increased from 0.8 to 0.9. The material product can be used for structural parts in the fields of aerospace, nuclear industry, transportation, ships, weapons and the like. Background technique [0003] The aluminum alloy containing the basic elements Mg and Si is the 6000 series aluminum alloy. This series of alloys has excellent c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C21/02C22C1/02C22F1/043C22F1/047
CPCC22C21/08C22C21/02C22C1/02C22C1/026C22F1/043C22F1/047
Inventor 钟立伟赵唯一于娟冯朝辉陆政陈军洲
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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