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7-series aluminum alloy hot top casting process for new energy automobile

A new energy vehicle, hot top casting technology, applied in the field of aluminum alloy casting, can solve the problems of extruded profile strain, center cracks, edge cracks, etc., to reduce the tendency of melting back, improve crack resistance, reduce range effect

Active Publication Date: 2022-07-08
山东友升铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems in the prior art, the present invention provides a hot-top casting process for high-strength 7-series aluminum alloys, specifically relating to a The hot-top casting process of 7116 aluminum alloy with a specification of 178mm solves the problem of edge cracks and center cracks at the beginning of aluminum rod casting under abnormal casting conditions, as well as the problem of segregation layer thickness, improves the casting yield, and solves the problem of Subsequent extrusion profile strain and oxidation blooming problems

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  • 7-series aluminum alloy hot top casting process for new energy automobile
  • 7-series aluminum alloy hot top casting process for new energy automobile
  • 7-series aluminum alloy hot top casting process for new energy automobile

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Embodiment 1

[0034] The 7-series aluminum alloy of the present invention includes the following components by weight:

[0035] Si≤0.10 part, Fe≤0.20 part, Cu0.45 part, Mn0.10 part, Mg1.30 part, Cr0.10 part, Zn5.60 part, Ti0.03 part, balance Al.

[0036] The 7-series aluminum alloy hot-top casting process includes the following process steps:

[0037] (1) Feeding: 20 parts of cold material (aluminum rod head and tail of the same material and profile return material) and 80 parts of electrolytic aluminum liquid are added to the regenerative smelting furnace;

[0038] (2) Smelting: After the molten aluminum reaches the temperature (740-750°C), the alloying elements are added after slag removal, and electromagnetic stirring is used to ensure uniform composition;

[0039] (3) Refining: After the first refining in the smelting furnace, the adjusted components are transferred to the holding furnace for secondary refining. During refining, high-purity argon gas is used to blow into the melt toget...

Embodiment 2

[0053]The 7-series aluminum alloy of the present invention includes the following components by weight:

[0054] Si≤0.10 part, Fe≤0.20 part, Cu0.45-0.55 part, Mn0.15 part, Mg1.40 part, Cr0.15 part, Zn6.00 part, Ti0.06 part, balance Al.

[0055] The 7-series aluminum alloy hot-top casting process includes the following process steps:

[0056] (1) Feeding: 30 parts of cold material (aluminum rod head and tail of the same material and profile return material) and 70 parts of electrolytic aluminum liquid are added to the regenerative smelting furnace;

[0057] (2) Smelting: After the molten aluminum reaches the temperature (740-750°C), the alloying elements are added after slag removal, and electromagnetic stirring is used to ensure uniform composition;

[0058] (3) Refining: After the first refining in the smelting furnace, the adjusted components are transferred to the holding furnace for secondary refining. During refining, high-purity argon gas is used to blow into the melt t...

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Abstract

The invention belongs to the technical field of aluminum alloy casting, and particularly relates to a 7-series aluminum alloy hot top casting process for a new energy automobile, which comprises the following process steps: feeding: adding a cold material into a heat accumulating type smelting furnace, and electrolyzing molten aluminum; smelting: slagging off molten aluminum at the temperature, adding alloying elements, and uniformly stirring; refining: after primary refining in a smelting furnace, transferring into a holding furnace for secondary refining after components are adjusted to be qualified; and drainage casting is conducted, specifically, the molten aluminum is subjected to online aluminum-titanium-boron wire adding, launder type degassing, box type degassing and two-stage filtering, and finally the molten aluminum is cast into the aluminum bar through a casting system. According to the hot top casting technology of the high-strength 7-series aluminum alloy, the problems that edge cracks and center cracks are generated under the abnormal casting condition at the beginning of aluminum bar casting and a segregation layer is thick are solved, the casting yield is increased, and the problems of strain and oxidation floating of a follow-up extruded profile are solved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy casting, and in particular relates to a 7-series aluminum alloy hot-top casting process for new energy vehicles. Background technique [0002] 7116 high-strength aluminum alloy material has the advantages of light weight, high strength and high toughness, and is widely used in the process of lightweight automobiles. However, due to its alloy characteristics, the 7116 aluminum alloy has a wide crystallization temperature range during solidification, poor plasticity in the solid-liquid phase, and high crack sensitivity. The simultaneous occurrence of cracks seriously affects the yield of aluminum rod casting. In addition, due to the high content of Zn, Mg, and Cu in the 7116 aluminum alloy, the surface segregation layer of the finished aluminum rod is thick, which seriously affects the subsequent extrusion processing performance of the material and the service performance of the final produc...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C1/06C22C21/10B22D27/20C22B9/02
CPCC22C1/03C22C1/026C22C1/06C22C21/10C22B9/023B22D27/20Y02P10/20
Inventor 罗世兵卓振
Owner 山东友升铝业有限公司
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