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Aluminum alloy for refrigeration compartment and preparation method of aluminum alloy

An aluminum alloy and aluminum casting technology, which is applied in the field of aluminum alloy materials, can solve the problems that cannot further satisfy the strength, elongation and corrosion resistance of refrigerators, achieve significant economic and social benefits, and improve corrosion resistance

Inactive Publication Date: 2021-05-04
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

[0005] In view of the fact that the existing aluminum alloys cannot further meet the comprehensive requirements for strength, elongation and corrosion resistance of refrigerators, the present invention provides an aluminum alloy for containers that meets the comprehensive requirements of strength, elongation and corrosion resistance and its preparation method

Method used

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  • Aluminum alloy for refrigeration compartment and preparation method of aluminum alloy

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Embodiment 1

[0035] An aluminum alloy for refrigerated compartments, containing the following components in weight percent: 1.0% magnesium, 0.70% silicon, 0.65% manganese, 0.4% chromium, 0.4% rare earth, 0.3% zirconium, 0.3% neodymium, 0.25% copper, 0.1% titanium, iron≤0.3%, zinc≤0.15% %, strontium 0.08, the balance is aluminum and unavoidable impurities, wherein the sum of impurities is ≤0.15%, and the individual impurities are ≤0.005%.

[0036] An aluminum alloy for a refrigerated compartment is manufactured by the following steps:

[0037] (1) Add the aluminum ingot to the smelting furnace. After the aluminum ingot is melted, add the raw materials of magnesium, silicon, iron, titanium, zirconium, zinc, copper, and strontium into the smelting furnace in sequence. After the raw materials are all melted, After the furnace temperature reaches 750-770°C and stays for 40 minutes, remove the slag;

[0038] (2) Raise the temperature and add Al-Mn, Al-Cr, Al-Nd and rare earth aluminum master al...

Embodiment 2

[0045] An aluminum alloy for refrigerated compartments, containing the following ingredients in weight percent: 1.2% magnesium, 0.85% silicon, 0.8% manganese, 0.5% chromium, 0.5% rare earth, 0.4% zirconium, 0.4% neodymium, 0.35% copper, and 0.2% titanium , iron ≤ 0.3%, zinc ≤ 0.15%, strontium 0.10%, the balance is aluminum and unavoidable impurities, wherein the sum of impurities ≤ 0.15%, and a single impurity ≤ 0.005%.

[0046] An aluminum alloy for a refrigerated compartment is manufactured by the following steps:

[0047] (1) Add the aluminum ingot to the smelting furnace. After the aluminum ingot is melted, add the raw materials of magnesium, silicon, iron, titanium, zirconium, zinc, copper, and strontium into the smelting furnace in sequence. After the raw materials are all melted, After the furnace temperature reaches 750-770°C and stays for 40 minutes, remove the slag;

[0048] (2) Raise the temperature and add Al-Mn, Al-Cr, Al-Nd and rare earth aluminum master alloy t...

Embodiment 3

[0055] An aluminum alloy for refrigerated compartments, containing the following ingredients in weight percent: 1.1% magnesium, 0.77% silicon, 0.75% manganese, 0.45% chromium, 0.45% rare earth, 0.35% zirconium, 0.35% neodymium, 0.30% copper, and 0.15% titanium , iron ≤ 0.3%, zinc ≤ 0.15%, strontium 0.09%, the balance is aluminum and unavoidable impurities, wherein the sum of impurities ≤ 0.15%, and a single impurity ≤ 0.005%.

[0056] An aluminum alloy for a refrigerated compartment is manufactured by the following steps:

[0057] (1) Add the aluminum ingot to the smelting furnace. After the aluminum ingot is melted, add the raw materials of magnesium, silicon, iron, titanium, zirconium, zinc, copper, and strontium into the smelting furnace in sequence. After the raw materials are all melted, After the furnace temperature reaches 750-770°C and stays for 40 minutes, remove the slag;

[0058] (2) Raise the temperature and add Al-Mn, Al-Cr, Al-Nd and rare earth aluminum master a...

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Abstract

An aluminum alloy for a refrigeration compartment comprises the following components in percentage by weight: 1.0%-1.2% of magnesium, 0.70%-0.85% of silicon, 0.65%-0.8% of manganese, 0.4%-0.5% of chromium, 0.4%-0.5% of rare earth, 0.3%-0.4% of zirconium, 0.3%-0.4% of neodymium, 0.25%-0.35% of copper, 0.1%-0.2% of titanium, smaller than or equal to 0.3% of iron, smaller than or equal to 0.15% of zinc, 0.08%-0.10% of strontium and the balance of aluminum and inevitable impurities, wherein the sum of the impurities is smaller than or equal to 0.15%, and the single impurity is smaller than or equal to 0.005%. By adopting the preparation method with twice long-time standing and slagging-off, graded homogenization treatment, high-temperature long-time solution treatment, high-cooling-speed graded quenching and multi-stage rapid heating aging treatment, the corrosion resistance is improved by more than one time, the tensile strength is improved by 33.4% at the minimum, the specified non-ratio extension strength is improved by 36.0% at the minimum, and the ductility is improved by 41.4% at the minimum, so that the economic benefit and the social benefit are obvious.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to an aluminum alloy for refrigerated compartments and a preparation method thereof. Background technique [0002] Due to its low density, high specific strength, and good plasticity, aluminum alloys are used more and more widely. Especially in recent years, the strength and other properties of aluminum alloys have been continuously improved. Various industries such as instruments and meters account for an increasing proportion of metal materials, and at the same time put forward higher requirements for the performance of aluminum alloys, especially comprehensive performance, including strength, elongation and corrosion resistance. [0003] At present, the main manufacturing materials of refrigerated compartments include: polyurethane plastic, glass fiber reinforced plastic, weather-resistant steel, stainless steel, etc. With the increase of cargo transportation, th...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/03C22F1/047
CPCC22C1/026C22C1/03C22C21/08C22F1/002C22F1/047
Inventor 阮祥明黄刚
Owner 安徽生信新材料股份有限公司