High-toughness corrosion-resistant aluminum alloy and heat treatment method thereof

A technology of corrosion-resistant aluminum alloy and high toughness, which is applied in the field of high-toughness corrosion-resistant aluminum alloy and its heat treatment method. It can solve the problems of single casting method, low crack tendency, and difficult casting, and achieve the improvement of oxide film characteristics and crack tendency. low resistance, and the effect of improving mechanical properties

Inactive Publication Date: 2020-09-01
WENXI COUNTY REGAL MAGNESIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a high-content magnesium-aluminum alloy material suitable for the production of various casting methods such as metal mold casting, high-pressure die-casting, forging, etc., and solves the problem of casting aluminum alloy materials with high magnesium content in actual industrial production. The problem of single method and difficult casting; the material has high toughness and good deformation ability, high strength, low crack tendency, and good corrosion resistance. It can be widely used in ships, automobiles, and bicycles. Production of other parts

Method used

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  • High-toughness corrosion-resistant aluminum alloy and heat treatment method thereof
  • High-toughness corrosion-resistant aluminum alloy and heat treatment method thereof
  • High-toughness corrosion-resistant aluminum alloy and heat treatment method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Put all the metal aluminum ingots into a smelting furnace for smelting at a melting temperature of 750°C until they are completely melted to form an aluminum melt;

[0025] (2) Gradually add 2.8% Si, 0.25% Fe, 0.7% Mn, 0.25% Zn, 0.15% Ti, 0.15% Zr, 0.01% V to obtain aluminum alloy melt during heating;

[0026] (3) Stir the aluminum alloy melt at a temperature of 740°C for 10 minutes, add a special refining agent for aluminum alloys during the stirring process for refining and degassing; after refining, remove the flux and scum on the liquid surface, and let it stand for about 15min;

[0027] (4) Keep the melt temperature at 710°C, add 6.5% Mg, 50ppmBe, let stand for 15 minutes, and stir for 20 minutes after standing;

[0028] (5) Keep the aluminum alloy melt at 700°C for high-pressure die-casting to obtain the finished product;

[0029] The resulting finished product has not been heat-treated, and the tensile strength of the material is 363Mpa, the yield strength ...

Embodiment 2

[0031] (1) Put all the metal aluminum ingots into a smelting furnace for smelting at a melting temperature of 740°C until they are completely melted to form an aluminum melt;

[0032] (2) Gradually add 2.4% Si, 0.20% Fe, 0.5% Mn, 0.20% Zn, 0.11% Ti, 0.11% Zr, 0.015% V to obtain aluminum alloy melt during heating;

[0033] (3) Stir the aluminum alloy melt at a temperature of 750°C for 10 minutes. During the stirring process, add a special refining agent for aluminum alloys for refining and degassing; after refining, remove the flux and scum on the liquid surface, and let it stand for about 10min;

[0034] (4) Keep the melt temperature at 720°C, add 6.0% Mg, 45ppmBe, let stand for 15 minutes, and stir for 15 minutes after standing;

[0035] (5) Keep the aluminum alloy melt at 690°C and perform high-pressure die-casting to obtain the finished product;

[0036] (6) Carry out heat treatment to the obtained finished product, raise the temperature of the heat treatment furnace to 1...

Embodiment 3

[0039] (1) Put all the metal aluminum ingots into a smelting furnace for smelting at a melting temperature of 735°C until they are completely melted to form an aluminum melt;

[0040] (2) Gradually add 3.0% Si, 0.27% Fe, 0.75% Mn, 0.30% Zn, 0.18% Ti, 0.14% Zr, 0.025% V to obtain aluminum alloy melt during heating;

[0041] (3) Stir the aluminum alloy melt at a temperature of 720°C for 10 minutes. During the stirring process, add a special refining agent for aluminum alloys for refining and degassing; after refining, remove the flux and scum on the liquid surface, and let it stand for about 10min;

[0042] (4) Keep the melt temperature at 725°C, add 6.8% Mg, 55ppmBe, let stand for 20 minutes, and stir for 30 minutes after standing;

[0043] (5) Keep the aluminum alloy melt at 700°C for high-pressure die-casting to obtain the finished product;

[0044] (6) Carry out heat treatment to the obtained finished product, raise the temperature of the heat treatment furnace to 195° C.,...

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Abstract

The invention relates to a high-toughness corrosion-resistant aluminum alloy. The high-toughness corrosion-resistant aluminum alloy is characterized by comprising, by mass, 0.2-0.3% of Zn, 2.4-3.0% ofSi, 6.0-7.0% of Mg, 0.5-0.8% of Mn, 0.5% or less of Cu, 0.1-0.2% of Ti, 0.1-0.2% of Zr, 0.2-0.3% of Fe, 0.01-0.03% of V, 40-60ppm of Be and the balance Al and inevitable impurities. The obtained aluminum alloy material is suitable for casting type production comprising metal type, high-pressure die casting and the like, low in crack tendency, capable of being forged, good in corrosion resistance,suitable for corrosion environment industries such as ships and sea, high in toughness, good in strength and capable of being applied to some parts of automobiles, bicycles and the like.

Description

technical field [0001] The invention relates to a high-toughness corrosion-resistant aluminum alloy and its heat treatment method, and belongs to the technical field of non-ferrous metal materials. Background technique [0002] Due to its certain corrosion resistance, aluminum alloy materials are widely used in marine, ship and other fields. At present, the corrosion-resistant series of aluminum alloys are mainly deformed aluminum alloys such as 5xxx series, and cast aluminum alloys such as ZL305, because they contain high Mg The content makes the material have better corrosion resistance. Among the deformed aluminum alloys, 5052, 5252, 5083, 5356, etc. are the main ones, which are mostly used for rolling, extrusion, forging, etc. For casting deformation production, the magnesium content of this type of alloy is lower than 6%; the Mg content of ZL305 material used for casting production is 7.5-9.5%, when the Mg content is greater than 10%, the casting performance is signifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047
CPCC22C1/026C22C1/03C22C1/06C22C21/08C22F1/047
Inventor 闫国庆林毛古贾俊民柴海俊支红旗
Owner WENXI COUNTY REGAL MAGNESIUM
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