Aluminum alloy and its preparation method and application

A technology of aluminum alloy and cast aluminum alloy, applied in the field of die-casting aluminum alloy, can solve problems such as fracture

Active Publication Date: 2021-09-21
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum-silicon alloy provided by this method is required to contain titanium and not contain iron, which is used to solve the problem of sudden fracture in the use of existing products

Method used

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  • Aluminum alloy and its preparation method and application
  • Aluminum alloy and its preparation method and application

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preparation example Construction

[0043] The second aspect of the present invention provides a method for preparing the die-casting aluminum alloy of the present invention, comprising:

[0044] (1) heating and melting the aluminum ingot, and then adding aluminum-silicon alloy, aluminum-copper alloy, aluminum-magnesium alloy, aluminum-nickel alloy, aluminum-iron alloy and aluminum-chromium alloy for the first melting to obtain the alloy mixture;

[0045] (2) After refining and removing slag from the alloy mixture, adding an aluminum strontium alloy and an optional aluminum erbium alloy for a second smelting to obtain an aluminum alloy liquid;

[0046] (3) cooling the aluminum alloy liquid and casting it into a die-casting aluminum alloy after standing still.

[0047] The method for preparing the die-casting aluminum alloy in the present invention is obtained by melting various raw materials containing the above elements. Preferably, the step (1) includes: (1-1) heating and melting the aluminum ingot to obtain ...

Embodiment 1

[0061] The composition and weight percentage of the prepared high-strength die-casting aluminum alloy are as follows:

[0062] 9.0% Si, 4.0% Cu, 1.0% Mg, 0.2% Ni, 0.6% Fe, 0.2% Cr, 0.03% Sr, 0.2% Er, 0.1% by weight or less of impurities, and the rest being Al. Wherein the weight ratio of Cu:Mg is 4:1.

[0063] Prepare aluminum ingots, aluminum-silicon alloys, aluminum-copper alloys, aluminum-magnesium alloys, aluminum-iron alloys, aluminum-nickel alloys, aluminum-chromium alloys, aluminum-strontium alloys and aluminum-erbium alloys according to the above composition:

[0064] (1) Add and melt aluminum ingots to obtain molten aluminum, and keep the temperature at about 720°C;

[0065] Add aluminum-silicon alloy, aluminum-copper alloy and aluminum-magnesium alloy to molten aluminum for smelting-I, and keep the temperature at about 720°C;

[0066] Add aluminum-iron alloy, aluminum-nickel alloy and aluminum-chromium alloy for smelting-II, and keep the temperature at about 720°C ...

Embodiment 2

[0070] The composition and weight percentage of the prepared high-strength die-casting aluminum alloy are as follows:

[0071] 10.0% Si, 2.5% Cu, 1.0% Mg, 0.2% Ni, 0.6% Fe, 0.2% Cr, 0.03% Sr, 0.1% Er, 0.1% by weight or less of impurities, and the rest being Al. Wherein the weight ratio of Cu:Mg is 2.5:1.

[0072] Prepare aluminum ingots, aluminum-silicon alloys, aluminum-copper alloys, aluminum-magnesium alloys, aluminum-iron alloys, aluminum-nickel alloys, aluminum-chromium alloys, aluminum-strontium alloys and aluminum-erbium alloys according to the above composition:

[0073] (1) Add and melt aluminum ingots to obtain molten aluminum, and keep the temperature at about 730°C;

[0074] Add aluminum-silicon alloy, aluminum-copper alloy and aluminum-magnesium alloy to molten aluminum for smelting-I, and keep the temperature at about 740°C;

[0075] Add aluminum-iron alloy, aluminum-nickel alloy and aluminum-chromium alloy for smelting-II, and keep the temperature at about 720...

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Abstract

The invention relates to the field of die-casting aluminum alloys, and discloses die-casting aluminum alloys and a preparation method and application thereof. Based on the total weight of the aluminum alloy, it includes: 8-11% by weight of Si, 2.5-5% by weight of Cu, 0.5-1.5% by weight of Mg, 0.1-0.3% by weight of Ni, and 0.6-1.2% by weight of Fe , 0.1-0.3% by weight of Cr, 0.03-0.05% by weight of Sr, 0-0.3% by weight of Er, 80.25-88.1% by weight of Al and 0.1% by weight or less of impurities. The aluminum alloy is suitable for die-casting and processing to produce aluminum alloy thin-walled parts, meeting the needs of thin-walled parts, light weight, high strength and casting production.

Description

technical field [0001] The invention relates to the field of die-casting aluminum alloys, in particular to a high-strength die-casting aluminum alloy and its preparation method and application. Background technique [0002] Aluminum alloy has the characteristics of light weight, good strength and toughness, corrosion resistance and unique metallic luster, and is adopted by more and more electronic appliances, communication equipment, lighting devices, automobiles and other parts, such as smart phones, notebook computers, tablets Computer casings, radiators and lampshades for LED lights, radiators, cabinets, and filters for 3G and 4G wireless communication base stations, heating plates for rice cookers, induction cookers, and water heaters, controller boxes for new energy vehicles, drive motor casings, etc. In order to meet the needs of thin-walled parts, lightweight, high-strength and casting production, higher and higher requirements are put forward for the casting fluidity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/03
CPCC22C21/02C22C1/03C22C1/026C22C21/04C22C21/14B22D21/007B22D21/04
Inventor 郭强谢勇亮李运春廖梦觉
Owner BYD CO LTD
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