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A kind of high-strength easily recrystallized deformable aluminum alloy and its preparation method

A technology for deforming aluminum alloys and recrystallization, applied in the field of alloy metals, can solve problems such as large deformation, and achieve the effects of easy recrystallization, overcoming the inability to balance strength and recrystallization temperature, and simple operation.

Inactive Publication Date: 2019-03-22
常州市亿和合金熔铸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention adopts multi-element micro-alloying means, controls the ratio between various micro-alloying elements by optimizing the selection of various micro-alloying elements, and forms a structure with high strength, large deformation and easy recrystallization, which overcomes the In the past, there were many defects in aluminum alloy casting, and the strength and toughness of the material had a certain balance

Method used

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  • A kind of high-strength easily recrystallized deformable aluminum alloy and its preparation method
  • A kind of high-strength easily recrystallized deformable aluminum alloy and its preparation method
  • A kind of high-strength easily recrystallized deformable aluminum alloy and its preparation method

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Embodiment 1

[0022] Embodiment 1# to 8#

[0023] The composition and weight percentage of the aluminum alloys involved in the examples and comparative examples of the present invention are (see Table 1 for specific composition):

[0024] Mg.2-3%, Zn.4-8%, Zr.0-0.1%, Sc.0-0.2%, Cr.0-0.2%, Ag.0.001-0.1%, the balance is Al. The composition meets: Si<0.15%, Cu<0.15%, Mn<0.15%, Fe<0.15%, Ti<0.1%.

[0025] The invention provides a method for preparing a high-strength Al-Mg-Zn-Zr-Sc-Cr-Ag deformed aluminum alloy, comprising the following steps:

[0026] (1) Aluminum, magnesium, zinc, zirconium, scandium, chromium and silver are mixed according to the mass fraction in SF 6 and CO 2 Under the protection of mixed gas, it is melted in a crucible furnace at 760-780 ° C to make a consumable electrode rod, which is then placed in an electroslag furnace. The mass percentage is MgF 2 , MgCl 2 , KCl and AlP are mixed evenly, baked at 400°C for more than 6 hours, and then add consumable electrode rods...

Embodiment 9

[0036] Embodiment 9# to 16#

[0037] The composition and weight percentage of the aluminum alloy involved in the embodiment of the present invention are Mg.3%, Zn.8%, Zr.0.1%, Sc.0.2%, Cr.0.2%, Ag.0.1%, and the balance is Al. The components satisfy: Si<0.15%, Cu<0.15%, Mn<0.15%, Fe<0.15%, Ti<0.1%.

[0038] The invention provides a method for preparing a high-strength Al-Mg-Zn-Zr-Sc-Cr-Ag deformed aluminum alloy, comprising the following steps:

[0039] (1) Aluminum, magnesium, zinc, zirconium, scandium, chromium and silver are mixed according to the mass fraction in SF 6 and CO 2 Under the protection of mixed gas, it is melted in a crucible furnace at 760-780 ° C to make a consumable electrode rod, which is then placed in an electroslag furnace. The mass percentage is MgF 2 , MgCl 2 , KCl and AlP are mixed evenly, baked at 400°C for more than 6 hours, and then add consumable electrode rods. The amount of slag is 5% of the weight of the consumable electrode rod. The electr...

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Abstract

The invention discloses a high-strength easily-recrystallized deformation aluminum alloy and a preparation method thereof. The aluminum alloy is reasonable in component ratio. Trace Ag elements can enhance the mechanical properties of the aluminum alloy and improve the smoothness of anodic oxidation. The invention further provides the preparation method of the deformation aluminum alloy. The preparation method comprises the steps of conducting two-time cold extrusion to obtain an initial sectional material after electroslag smelting casting at indoor temperature; conducting multiple passes of indoor-temperature drawing and annealing; and finally conducting homogenization heat treatment and two-stage ageing treatment to obtain a final sectional material. An aluminum alloy cast ingot obtained through the electroslag smelting casting has the advantages of good castability, weldability, easy processing and the like. The technological process is a superposition of several simple processes, but the optimal technological process obtained by summarizing material composition features and technological characteristics. A more uniform structure can be obtained. Thus, the alloy has excellent strength and toughness.

Description

technical field [0001] The invention relates to the technical field of alloy metals, in particular to a high-strength, easily recrystallized, deformable aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy has low density, high specific strength and specific stiffness, and good formability. It is one of the most widely used light metals in metal materials, and its usage is second only to steel. Traditional aluminum alloy structural parts are mostly produced by casting technology, but problems such as casting defects often occur, which greatly reduces productivity. The deformed aluminum alloy is formed by melting and casting, and then processed by hot extrusion, rolling and other methods to obtain plates, wires and bars. Compared with cast aluminum alloy, wrought aluminum alloy has higher strength, plasticity, corrosion resistance and other characteristics, so it has been more widely used. Since the 1960s, material science and techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/02C22F1/053
CPCC22C1/026C22C21/10C22F1/002C22F1/053
Inventor 白晶张越曹瑞桦孟姣陶卫建王明华
Owner 常州市亿和合金熔铸有限公司
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