Material for preventing formation of large grains in aluminum alloy sections and preparation method thereof

A technology for aluminum alloy profiles and large grains, which is applied in the field of aluminum alloy preparation, can solve the problems of excessive grain growth, deformation of aluminum alloy billets, compressive stress, large and uneven temperature rise, etc., and achieves the effect of uniform structure.

Inactive Publication Date: 2013-07-03
姚芸
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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 t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] The preparation method is:

[0020] Ingredients, by weight, 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 and the balance of aluminum are calculated and batched;

[0021] Smelting, the above ingredients are smelted into liquid and kept for 1 hour, then constant temperature casting is performed, and the cooling rate is maintained at 15-20°C / min during the cooling process to form an aluminum alloy ingot;

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

Example Embodiment

[0023] Example 2

[0024] The preparation method is:

[0025] Ingredients, by weight, 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 and the balance of aluminum are calculated and batched;

[0026] Smelting, smelting the above-mentioned ingredients into a liquid and keeping the temperature for 1.5 hours, then performing constant temperature casting, and maintaining a cooling rate of 15-20°C / min during the cooling process to uniformly lower the temperature into an aluminum alloy ingot;

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

Example Embodiment

[0028] Example 3

[0029] The preparation method is:

[0030] Ingredients, by weight, 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 and the balance of aluminum are calculated and batched;

[0031] Smelting, smelting the above-mentioned ingredients into a liquid and keeping the temperature for 1.5 hours, then performing constant temperature casting, and maintaining a cooling rate of 15-20°C / min during the cooling process to uniformly lower the temperature into an aluminum alloy ingot;

[0032] Quenching, the aluminum alloy ingot is kept in a quenching furnace at 520±20°C for 2 hours for constant temperature extrusion, and the extrusion speed is 1.5-2.5 m / min, and water-liquid quenching and air-cooling quenching are used; first, 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 for preventing the formation of large grains in aluminum alloy sections and a preparation method thereof. The material is composed of the following components 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, and the balance of Al. The material can well ensure small grains in the aluminum alloy microstructure and prevent the growth of grains. The uniformity of microstructure is guaranteed by the preparation process.

Description

technical field [0001] The invention belongs to the field of aluminum alloy preparation, in particular to a material and a preparation method for preventing large grains from appearing in an aluminum alloy profile. Background technique [0002] Because aluminum alloy has the advantages of light weight, high strength and corrosion resistance, it has been widely used in vehicle manufacturing, machinery and construction and other fields. 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. Such an al...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02C22F1/043
Inventor 姚芸
Owner 姚芸
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