CN-116676514-B - Aluminum alloy material for new energy automobile framework and preparation method thereof

Abstract

The invention discloses an aluminum alloy material for a new energy automobile framework and a preparation method thereof, wherein the aluminum alloy material for the new energy automobile framework comprises the following components ：Mn0.2-0.5％,Si0.2-2.0％,Fe0.2-0.35％,Zn1.5-2.5％,Cu0.5-1.5％,Mg2.0-4.0％,B0.05-0.1％,Ti0.05-0.15％,Y0.1-0.3％, in percentage by mass, and the balance of Al and unavoidable impurities. The aluminum alloy material for the new energy automobile skeleton has high strength, good die casting performance and excellent wear resistance and corrosion resistance, and the new energy automobile skeleton prepared by the aluminum alloy material can meet the structural strength of an automobile body.

Inventors

• SUN LI
• DAI HAITAO

Assignees

• 慈溪市宜美佳铝业有限公司

Dates

Publication Date

20260512

Application Date

20230608

Claims (1)

1. 1. The aluminum alloy material for the new energy automobile skeleton is characterized by comprising the following components in percentage by mass of 0.5% of Mn, 2.0% of Si, 0.25% of Fe, 2.0% of Zn, 1.0% of Cu, 4.0% of Mg, 0.1% of B, 0.15% of Ti, 0.2% of Y and the balance of Al and unavoidable impurities; the preparation method of the aluminum alloy material for the new energy automobile skeleton comprises the following steps: Adding aluminum, magnesium, zinc, aluminum copper alloy, aluminum iron alloy, aluminum silicon alloy and aluminum manganese alloy into a smelting furnace, melting all the aluminum, magnesium, zinc, aluminum copper alloy, aluminum iron alloy, aluminum silicon alloy and aluminum manganese alloy, and stirring the materials uniformly and fully at the melting temperature of 750 ℃; Adding a deslagging agent and a refining agent for removing impurity gas, skimming and standing, wherein the addition amount of the deslagging agent is 0.4% of the mass of the melt obtained in the step one, and the addition amount of the refining agent is 0.35% of the mass of the melt obtained in the step one, and the deslagging agent comprises silicate; adding aluminum-titanium-boron alloy and magnesium-yttrium alloy, fully melting at 740 ℃, introducing argon for refining, and skimming; And fourthly, standing and cooling to 680 ℃, and casting to obtain the aluminum alloy material for the new energy automobile skeleton.

Description

Aluminum alloy material for new energy automobile framework and preparation method thereof Technical Field The invention relates to the technical field of aluminum alloy materials, in particular to an aluminum alloy material for a new energy automobile framework and a preparation method thereof. Background The new energy automobile adopts unconventional automobile fuel as power source, integrates advanced technology in the aspects of power control and driving of the automobile, and forms an automobile with advanced technical principle, new technology and new structure. The new energy automobile comprises a pure electric automobile, a hybrid electric automobile and the like. The current technical development of the new energy automobile framework material is subject to light weight, high performance, safety, environmental protection and energy saving. The traditional automobile body design adopts the steel sheet as the material, is formed by punching plate welding in many ways, compares in traditional car, and new energy automobile is more urgent to lightweight technical requirement. When the aluminum alloy member is used as a skeleton of a new energy automobile, if the requirement of higher mechanical property cannot be met, the structural strength of the whole automobile body can be influenced. Therefore, the development of the aluminum alloy material for the new energy automobile framework has the advantages of high strength, good die casting performance, excellent wear resistance and corrosion resistance, and is a problem which needs to be solved by the technicians in the field. Disclosure of Invention The invention aims at overcoming the defects in the prior art and provides an aluminum alloy material for a new energy automobile framework and a preparation method thereof. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The first aspect of the invention provides an aluminum alloy material for a new energy automobile framework, which comprises the following components ：Mn 0.2-0.5％,Si 0.2-2.0％,Fe 0.2-0.35％,Zn 1.5-2.5％,Cu 0.5-1.5％,Mg 2.0-4.0％,B 0.05-0.1％,Ti 0.05-0.15％,Y 0.1-0.3％, by mass percent, and the balance of Al and unavoidable impurities. Further, the aluminum alloy material for the new energy automobile skeleton comprises the following components ：Mn 0.4-0.5％,Si 1.5-2.0％,Fe 0.2-0.25％,Zn 1.5-2.0％,Cu 0.5-1.0％,Mg 3.0-4.0％,B 0.08-0.1％,Ti 0.1-0.15％,Y 0.1-0.2％, in percentage by mass, and the balance of Al and unavoidable impurities. Further, the weight ratio of Mg to Si is 1.65 or less. The second aspect of the invention provides a preparation method of the aluminum alloy material for the new energy automobile skeleton, which comprises the following steps: adding aluminum, magnesium, zinc, aluminum copper alloy, aluminum iron alloy, aluminum silicon alloy and aluminum manganese alloy into a smelting furnace, melting all the aluminum, magnesium, zinc, aluminum copper alloy, aluminum iron alloy, aluminum silicon alloy and aluminum manganese alloy, and stirring the materials uniformly at the melting temperature of 750-770 ℃; adding a deslagging agent and a refining agent for removing impurity gas, skimming and standing; Adding aluminum-titanium-boron alloy and magnesium-yttrium alloy, and introducing argon for refining after the aluminum-titanium-boron alloy and the magnesium-yttrium alloy are sufficiently melted at 720-750 ℃ to remove slag; and fourthly, standing and cooling to 680-690 ℃, and casting to obtain the aluminum alloy material for the new energy automobile skeleton. Further, the addition amount of the deslagging agent is 0.4% of the mass of the melt obtained in the step one, and the addition amount of the refining agent is 0.35% of the mass of the melt obtained in the step one. Further, the deslagging agent comprises silicate, and the refining agent is a sodium-free refining agent. Compared with the prior art, the invention has the following technical effects: The aluminum alloy material for the new energy automobile skeleton has high strength, good die casting performance and excellent wear resistance and corrosion resistance, and the new energy automobile skeleton prepared by the aluminum alloy material can meet the structural strength of an automobile body. Detailed Description The invention will be further illustrated, but is not limited, by the following examples. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. Example 1 The embodiment provides an aluminum alloy material for a new energy automobile framework, which comprises the following components in percentage by mass of 0.4% of Mn, 1.5% of Si, 0.2% of Fe, 1.5% of Zn, 0.5% of Cu, 3.0% of Mg, 0.08% of B, 0.1% of Ti, 0.1% of Y and the balance of Al and unavoidable impurities. Example 2 The embodiment provides an aluminum alloy material for a new energy automobile framework, which comprises