Aluminum alloy for high-speed rail windshield and preparation method thereof

An aluminum alloy and windshield technology, applied in the field of aluminum alloy materials, can solve the problems that aluminum alloy profiles cannot have obvious deformation and structural defects, affect the quality and service life of high-speed rail car windshields, reduce product plasticity, etc., and achieve fine grain size , Welding performance improvement, the effect of ensuring the effect

Inactive Publication Date: 2019-08-16
安徽生信新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The windshield of the high-speed rail car needs to be bent into a rectangular box during the manufacturing process. The aluminum alloy profile should not have obvious deformation and structural defects during the rounding process. However, the existing aluminum alloys will be hard when they are bent and deformed. Large density of dislocations will be generated around the phase, forming a dislocation-enriched area, hindering deformation, reducing the plasticity of the product, and seriously affecting the quality and service life of the windshield of the high-speed rail car

Method used

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  • Aluminum alloy for high-speed rail windshield and preparation method thereof

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Effect test

Embodiment 1

[0019] An aluminum alloy for high-speed rail windshields, which is composed of the following components in weight percentage: 0.48% magnesium, 0.33% silicon, 0.12% iron, 0.06% chromium, 0.06% manganese, 0.02% zinc, and 0.06% copper , titanium ≤ 0.1%, the balance is aluminum and impurities with a content ≤ 0.5%.

[0020] The preparation method is as follows:

[0021] (1) Heat the molten aluminum to 740°C, add magnesium ingots (the mass ratio of magnesium is 99.99%) and aluminum-silicon alloy (the mass ratio of silicon is 20%), mix well, and pass into the refining agent for three times of refining and slag removal , the main components of the refining agent are NaNO3, KF, NaF, etc., and the dosage is 0.32% of the weight of the aluminum liquid;

[0022] (2) Carry out rapid pre-furnace analysis of the components of the molten aluminum, replenish materials, and adjust the content of each component;

[0023] (3) adding aluminum-titanium-boron wire to the aluminum liquid at a unifo...

Embodiment 2

[0029] An aluminum alloy for high-speed rail windshields, which is composed of the following components in weight percentage: 0.53% magnesium, 0.35% silicon, 0.12% iron, 0.1% chromium, 0.06% manganese, 0.02% zinc, and 0.06% copper , titanium ≤ 0.1%, the balance is aluminum and impurities with a content ≤ 0.5%.

[0030] The preparation method is as follows:

[0031] (1) Heat the molten aluminum to 740°C, add magnesium ingots (the mass ratio of magnesium is 99.99%) and aluminum-silicon alloy (the mass ratio of silicon is 20%), mix well, and pass into the refining agent for three times of refining and slag removal , the main components of the refining agent are NaNO3, KF, NaF, etc., and the dosage is 0.32% of the weight of the aluminum liquid;

[0032] (2) Carry out rapid pre-furnace analysis of the components of the molten aluminum, replenish materials, and adjust the content of each component;

[0033] (3) adding aluminum-titanium-boron wire to the aluminum liquid at a unifor...

Embodiment 3

[0039] An aluminum alloy for high-speed rail windshield, which is composed of the following components in weight percentage: 0.50% magnesium, 0.34% silicon, 0.12% iron, 0.08% chromium, 0.06% manganese, 0.02% zinc, 0.06% copper, Titanium≤0.1%, the balance is aluminum and impurities with a content≤0.5%.

[0040] The preparation method is as follows:

[0041] (1) Heat the molten aluminum to 740°C, add magnesium ingots (the mass ratio of magnesium is 99.99%) and aluminum-silicon alloy (the mass ratio of silicon is 20%), mix well, and pass into the refining agent for three times of refining and slag removal , the main components of the refining agent are NaNO3, KF, NaF, etc., and the dosage is 0.32% of the weight of the aluminum liquid;

[0042] (2) Carry out rapid pre-furnace analysis of the components of the molten aluminum, replenish materials, and adjust the content of each component;

[0043] (3) adding aluminum-titanium-boron wire to the aluminum liquid at a uniform speed t...

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Abstract

Disclosed is an aluminum alloy for a high-speed rail windshield. The aluminum alloy comprises the following components of, by weight percentage, 0.48-0.53% of magnesium, 0.33-0.35% of silicon, less than or equal to 0.12% of iron, 0.06%-0.1% of chromium, less than or equal to 0.06% of manganese, less than or equal to 0.02% of zinc, less than or equal to 0.06% of copper, less than or equal to 0.1% of titanium and the balance of aluminum and impurities with the content being less than or equal to 0.5%. The components of the aluminum alloy are reasonably arranged, and the alloy is uniform in structure through the specific preparation method; crystal grains are fine; gas holes, impurities and coarse crystal are obviously reduced; the tensile strength and the yield strength are ensured, and at the same time, the elongation rate of the aluminum alloy is improved by 47%; and meanwhile, the welding performance is also improved, and the effect of circular machining can be ensured.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to an aluminum alloy for high-speed rail windshields and a preparation method thereof. Background technique [0002] Aluminum alloy has the characteristics of moderate strength, light weight, and easy forming, and is especially suitable for manufacturing high-speed rail parts. [0003] The windshield of the high-speed rail car needs to be bent into a rectangular box during the manufacturing process. The aluminum alloy profile should not have obvious deformation and structural defects during the rounding process. However, the existing aluminum alloys will be hard when they are bent and deformed. A relatively high density of dislocations is generated around the phase, forming a dislocation-enriched area, hindering deformation, reducing the plasticity of the product, and seriously affecting the quality and service life of the windshield of the high-speed rail car. Co...

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 阮祥明
Owner 安徽生信新材料股份有限公司
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