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Material for preventing large grains from appearing in aluminum alloy and preparing method for material

A large-grain, aluminum alloy technology, applied in the field of materials and preparations to prevent large-grain aluminum alloys from appearing, can solve problems such as excessive grain growth, deformation of aluminum alloy blanks, compressive stress, large and uneven temperature rise, etc. , to achieve a uniform organizational structure

Inactive Publication Date: 2016-03-16
薛亚红
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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 , 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

[0018] Described preparation method is:

[0019] 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% of molybdenum, 0.01% of tin, 0.01% of strontium, 0.01% of ruthenium, 0.001% of samarium and the balance of aluminum are used to calculate the ingredients;

[0020] Melting, melting the above ingredients into a liquid and keeping it warm for 1 hour, then casting at a constant temperature. During the cooling process, the cooling rate is maintained at 15-20°C / min to cool down at a constant speed to form an aluminum alloy ingot;

[0021] Quenching, keeping the aluminum alloy ingot in a quenching furnace at 520±20°C for 1 hour for constant temperature extrusion, the extrusion speed is 1.5-2.5 m / min, and adopts water liquid quenching and air cooling quenching; first, water liquid quenching to 250-280°C, then air-cooled and quenched to room temperature.

Embodiment 2

[0023] Described preparation method is:

[0024] 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% of molybdenum, 0.03% of tin, 0.03% of strontium, 0.03% of ruthenium, 0.003% of samarium and the balance of aluminum are used to calculate the ingredients;

[0025] Melting, melting the above ingredients into a liquid and keeping it warm for 1.5 hours, then casting at a constant temperature. During the cooling process, the cooling rate is maintained at 15-20°C / min and the temperature is uniformly cooled to form an aluminum alloy ingot;

[0026] Quenching, keeping the aluminum alloy ingot in a quenching furnace at 520±20°C for 2 hours for constant temperature extrusion, the extrusion speed is 1.5-2.5 m / min, and adopts water-liquid quenching and air-cooling quenching; first, water-liquid quenching to 250-280°C, then air-cooled and quenched to room tempera...

Embodiment 3

[0028] Described preparation method is:

[0029] 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% of molybdenum, 0.02% of tin, 0.015% of strontium, 0.015% of ruthenium, 0.002% of samarium and the balance of aluminum are used to calculate the ingredients;

[0030] Melting, melting the above ingredients into a liquid and keeping it warm for 1.5 hours, then casting at a constant temperature. During the cooling process, the cooling rate is maintained at 15-20°C / min and the temperature is uniformly cooled to form an aluminum alloy ingot;

[0031] Quenching, keeping the aluminum alloy ingot in a quenching furnace at 520±20°C for 2 hours for constant temperature extrusion, the extrusion speed is 1.5-2.5 m / min, and adopts water-liquid quenching and air-cooling quenching; first, water-liquid quenching to 250-280°C, then air-cooled and quenched to room temp...

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Abstract

The invention relates to a material for preventing large grains from appearing in an aluminum alloy and a preparing method for the material. The material comprises, by weight percentage, 0.58%-0.61% of magnesium, 0.03%-0.035% of carbon, 0.75%-0.78% of silicon, 0.30%-0.35% of manganese, 0.1%-0.15% of chromium, 0.2%-0.24% of copper, 0.2%-0.4% of iron, 0.03%-0.05% of titanium, 0.001%-0.0015% of vanadium, 0.05%-0.1% of molybdenum, 0.01%-0.03% of tin, 0.01%-0.03% of strontium, 0.01%-0.03% of ruthenium, 0.001%-0.003% of samarium and the balance aluminum. Small and thin grains inside an aluminum alloy structure are achieved better, and growth of the grains is restricted better. Through the preparation technology, uniformity of the structure is ensured.

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 the appearance of large grains of 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 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 , The deformation, compressive stress and temperature rise of the aluminum alloy billet are large, so that the problem of grain re-growth will occur during the quenching process, and the grain growth is too fast to form uneven coarse grains. Such an aluminum alloy st...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02C22F1/043
CPCC22C21/02C22C1/026C22F1/002C22F1/043
Inventor 薛亚红
Owner 薛亚红
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