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Material capable of preventing large grains from being produced in aluminium alloy and preparation method thereof

A technology of large grains and aluminum alloys, which is applied in the field of materials and preparations to prevent large grains of aluminum alloys, and can solve the problems of excessive grain growth, deformation of aluminum alloy blanks, large compressive stress and temperature rise, and grain re-growth and other issues, to achieve the effect of uniform structure

Inactive Publication Date: 2013-04-03
姚富云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the weight of the final product, the aluminum alloy profiles currently used are all thin-walled, hollow, etc., and for the aluminum alloy used as a plate, the current production method is mainly manufactured by extrusion and other processes, but in the extrusion process Among them, the deformation, compressive stress and temperature rise of the aluminum alloy billet are large, so that the grain re-growth problem will occur during the quenching process, and the grain growth is too fast to form uneven coarse grains

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method is:

[0020] Ingredients, by weight percentage, 0.58% magnesium, 0.03% carbon, 0.75% silicon, 0.30% manganese, 0.1% chromium, 0.2% copper, 0.2% iron, 0.03% titanium, 0.001% Vanadium, 0.05% molybdenum and the balance of aluminum are used to calculate the ingredients;

[0021] Melting: Melting the above ingredients into a liquid and holding it for 1 hour, and conduct constant temperature casting. During the cooling process, the cooling rate is maintained at 15-20°C / min and the temperature is uniformly cooled into an aluminum alloy ingot;

[0022] For quenching, heat the aluminum alloy ingot in a quenching furnace at 520±20℃ for 1 hour for constant temperature extrusion at a speed of 1.5-2.5 m / min, and adopt water-liquid quenching and air-cooling quenching; the first is water-liquid quenching to 250-280℃, then air-cooled and quenched to room temperature.

Embodiment 2

[0024] The preparation method is:

[0025] Ingredients, by weight percentage, 0.61% magnesium, 0.035% carbon, 0.78% silicon, 0.35% manganese, 0.15% chromium, 0.24% copper, 0.4% iron, 0.05% titanium, 0.0015% Vanadium, 0.1% molybdenum and the balance of aluminum are used for calculating ingredients;

[0026] Melting: Melting the above ingredients into a liquid and holding it for 1.5 hours, and then conduct constant temperature casting. During the cooling process, the cooling rate is maintained at 15-20°C / min and the temperature is uniformly reduced into an aluminum alloy ingot;

[0027] For quenching, heat the aluminum alloy ingot in a quenching furnace at 520±20℃ for 2 hours for constant temperature extrusion, at a speed of 1.5-2.5 m / min, and adopt water-liquid quenching and air-cooling quenching; the first is water-liquid quenching to 250-280℃, then air-cooled and quenched to room temperature.

Embodiment 3

[0029] The preparation method is:

[0030] Ingredients, by weight percentage, 0.60% magnesium, 0.03% carbon, 0.75% silicon, 0.33% manganese, 0.12% chromium, 0.22% copper, 0.3% iron, 0.45% titanium, 0.0015% Vanadium, 0.075% molybdenum and the balance aluminum are used to calculate the ingredients;

[0031] Melting: Melting the above ingredients into a liquid and holding it for 1.5 hours, and then conduct constant temperature casting. During the cooling process, the cooling rate is maintained at 15-20°C / min and the temperature is uniformly reduced into an aluminum alloy ingot;

[0032] For quenching, heat the aluminum alloy ingot in a quenching furnace at 520±20℃ for 2 hours for constant temperature extrusion, at a speed of 1.5-2.5 m / min, and adopt water-liquid quenching and air-cooling quenching; the first is water-liquid quenching to 250-280℃, then air-cooled and quenched to room temperature.

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PUM

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Abstract

The invention relates to a material capable of preventing large grains from being produced in aluminium alloy and a preparation method thereof. The material provided by the invention comprises the following ingredients in percentage by weight: 0.58-0.61% of Mg, 0.03-0.035% of C, 0.75-0.78% of Si, 0.30-0.35% of Mn, 0.1-0.15% of Cr, 0.2-0.24% of Cu, 0.2-0.4% of Fe, 0.03-0.05% of Ti, 0.001-0.0015% of V, 0.05-0.1% of Mo and the balance of Al. The material provided by the invention better realizes that grains in the structure of the aluminium alloy are fine and the growth of the grains is inhibited; and a uniform structure is guaranteed by virtue of a preparation process.

Description

Technical field [0001] The invention belongs to the field of aluminum alloy preparation, and particularly refers to a material and a preparation method for preventing the appearance of large crystal grains in the aluminum alloy. Background technique [0002] Because aluminum alloy has the advantages of light weight, high strength and corrosion resistance, it has been widely used in the fields of vehicle manufacturing, machinery and construction. In order to reduce the weight of the final product, the aluminum alloy profiles currently used are all thin-walled, hollow, etc., and for the aluminum alloy used as a plate, the current production method is mainly manufactured by extrusion and other processes, but in the extrusion process Among them, the deformation, compressive stress and temperature rise of the aluminum alloy blank are large, so that the grain re-growth problem will occur during the quenching process, and the grain growth is too fast to form uneven coarse grains. Such ...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22F1/043
Inventor 姚富云
Owner 姚富云
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