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Aluminum alloy and its preparation method and aluminum alloy structural parts

A technology for aluminum alloys and structural parts, applied in the field of materials, can solve the problems of unsatisfactory tensile strength, yield strength, elongation, poor mechanical properties, and needs to be improved

Active Publication Date: 2022-02-08
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing aluminum alloy materials have poor mechanical properties, and their tensile strength, yield strength, elongation and other properties cannot meet the needs of aluminum alloy die-casting products with high load-bearing requirements.
Therefore, the current aluminum alloy related technology still needs to be improved.

Method used

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  • Aluminum alloy and its preparation method and aluminum alloy structural parts
  • Aluminum alloy and its preparation method and aluminum alloy structural parts
  • Aluminum alloy and its preparation method and aluminum alloy structural parts

Examples

Experimental program
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Embodiment 1

[0041] Formula: based on 100 parts by weight of the total weight of the aluminum alloy, it contains 15 parts by weight of Zn, 7 parts by weight of Si, 1.5 parts by weight of Cu, 0.7 parts by weight of Fe, 0.01 parts by weight of Cr, and 0.02 parts by weight of Sr, And the rest of Al does not contain rare earth elements (RE).

[0042] Preparation method: add aluminum ingots to the melting furnace for melting, and keep the temperature at 730°C after melting; add aluminum-zinc master alloy, aluminum-silicon master alloy, aluminum-copper master alloy and aluminum-iron master alloy for melting, and keep the temperature at 730°C after melting; The element composition of the product is smelted by adding other intermediate alloys, and the temperature is kept at 730°C after smelting; the alloy liquid is stirred to make the composition uniform, and then the alloy liquid is deslagged, and the composition is tested by sampling; according to the test results, the content of each element is ...

Embodiment 2- Embodiment 30

[0044] Formula: The specific formula is shown in Table 1.

[0045] Preparation method: with embodiment 1.

[0046] Among them, the metallographic structure of the aluminum alloy prepared in Example 18 is as follows figure 1 As shown, the metallographic structure of the aluminum alloy prepared in Example 20 is as follows figure 2 As shown, the metallographic structure of the aluminum alloy prepared in Example 27 is as follows image 3 As shown, the metallographic structure of the aluminum alloy prepared in Example 29 is as follows Figure 4 shown. From the analysis of the metallographic structure, it can be seen that figure 2 relatively figure 1 The precipitated phase is more uniform and refined, image 3 relatively figure 2 The proportion of precipitated phase increases, Figure 4 relatively image 3 The proportion of precipitated phase increases. The results show that when the content of Sr and Cr in the alloy are equal, the metallographic structure of the alloy ...

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Abstract

The invention provides an aluminum alloy, a preparation method thereof, and an aluminum alloy structural part. Based on the total mass of the aluminum alloy, the aluminum alloy includes: 15-19% Zn; 7.0-9.0% Si; 1.5-3.0% Cu; 0.7-0.9% Fe; 0.01-0.04% Cr; 0.02-0.05% Sr; 0-0.3% rare earth elements; and 67.71-75.77% Al. The aluminum alloy has both high strength and high toughness, which can meet the requirements of structural parts with high strength and toughness requirements, such as electronic equipment structural parts, and can be widely used in mobile phones, tablet computers, etc. with small internal size and thin thickness. structural parts.

Description

technical field [0001] The invention relates to the technical field of materials, and in particular, to aluminum alloys, a preparation method thereof, and aluminum alloy structural parts. 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, lightweight, high-strength and casting production of parts, higher and higher requirements are put forward for the casting fluidity an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22C1/06
CPCC22C21/10C22C1/03C22C1/026C22C1/06
Inventor 谢勇亮李运春胡红迪郭强
Owner BYD CO LTD
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