A kind of high-strength aluminum alloy ingot and preparation method thereof

An aluminum alloy ingot, high-strength technology, applied in the field of aluminum alloy, can solve the problems of low pass rate of the oxide film on the fracture of the ingot and flaw detection, inclusions, large looseness, etc., to improve the pass rate of the oxide film on the fracture of the ingot and The pass rate of flaw detection, the effect of improving the pass rate of flaw detection and reducing the size of loose

Active Publication Date: 2022-03-29
SOUTHWEST ALUMINUM GRP
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Problems solved by technology

[0002] According to the production of conventional high-strength aluminum alloy ingots, only the chemical composition is controlled to meet the requirements of technical standards. The Ti element in the prepared ingots accumulates and inherits to the plate, and Ti-containing inclusions appear in the fracture of the plate, which affects the pass rate of the oxide film on the fracture of the ingot ( Currently less than 93%); the produced ingot contains more Fe, Si compounds and is loose, which affects the pass rate of ingot flaw detection (currently less than 92%)
The unstable control of the hydrogen content of the high-strength aluminum alloy melt produced by the existing technology leads to a low pass rate of the oxide film at the fracture of the ingot and a low pass rate of the flaw detection, which affects the user's needs; Low level, in order to meet the rapidly developing market requirements, it is urgent to improve the yield and metallurgical quality of the alloy

Method used

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  • A kind of high-strength aluminum alloy ingot and preparation method thereof
  • A kind of high-strength aluminum alloy ingot and preparation method thereof
  • A kind of high-strength aluminum alloy ingot and preparation method thereof

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preparation example Construction

[0033] The invention provides a method for preparing a high-strength aluminum alloy ingot, comprising:

[0034] Melting and casting alloy raw materials to obtain high-strength aluminum alloy ingots;

[0035] The alloy raw material includes aluminum ingot, and the total mass content of Fe and Si in the aluminum ingot is ≤0.1%.

[0036] In the present invention, the alloy raw material preferably includes an aluminum ingot.

[0037] In the present invention, the grade of the aluminum ingot is preferably 99.93-99.97%, more preferably 99.94-99.96%, most preferably 99.95%; the mass content of Fe in the aluminum ingot is preferably 0.002-0.04%, more preferably 0.01-0.03%, most preferably 0.02%; the mass content of Si in the aluminum ingot is preferably 0.01-0.03%, more preferably 0.02%; the total content of Fe and Si in the aluminum ingot is preferably ≤0.1%.

[0038] In the present invention, the alloy raw material preferably also includes scrap.

[0039] In the present invention...

Embodiment 1

[0101] Prepare high-strength aluminum alloy ingots according to the following method:

[0102] Batching, smelting, on-line processing, casting, soaking, processing, and delivery are carried out in sequence.

[0103] Ingredients:

[0104] Al99.95% aluminum ingots, intermediate alloys or pure metals, and first-class scrap are used as ingredients, and the proportion of scrap used is ≤60%. Ti is not matched or supplemented in the whole process. The chemical composition of the alloy raw materials is controlled according to Table 1.

[0105] Table 1 Example 1 of the present invention alloy raw material batching composition control

[0106]

[0107] Smelting:

[0108] When charging the smelting furnace, Zn ingots, Cu plates, Mg ingots, Al-Zr master alloys, and Al-Be master alloys are not added along with the furnace; when the furnace materials (aluminum ingots and scrap) are melted with a layer of liquid metal, Cu plates, Zn ingots are strictly prohibited from being exposed to ...

Embodiment 2

[0133] Prepare high-strength aluminum alloy ingots according to the following method:

[0134] Batching, smelting, on-line processing, casting, soaking, processing, and delivery are carried out in sequence.

[0135] Ingredients:

[0136] Al99.95% aluminum ingots, intermediate alloys or pure metals, and first-class scrap are used as ingredients, and the proportion of scrap used is ≤60%. Ti is not matched or supplemented in the whole process. The chemical composition of the alloy raw materials is controlled according to Table 1.

[0137] Smelting:

[0138] When charging the smelting furnace, Zn ingots, Cu plates, Mg ingots, Al-Zr master alloys, and Al-Be master alloys are not added along with the furnace; when the furnace materials (aluminum ingots and scrap) are melted with a layer of liquid metal, Cu plates, Zn ingots are strictly prohibited from being exposed to the liquid surface or close to the bottom of the furnace; when the metal temperature rises to 740°C, add Al-Zr ma...

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Abstract

The invention provides a method for preparing a high-strength aluminum alloy ingot, comprising: melting and casting an alloy raw material to obtain a high-strength aluminum alloy ingot; the alloy raw material includes an aluminum ingot, and Fe and Si in the aluminum ingot The total mass content is ≤0.1%. The present invention cancels the addition of Al-Ti intermediate alloy in front of the furnace, reduces the production cost while improving the pass rate of the oxide film on the fracture surface of the ingot; controls the content of Fe and Si impurities, and the geometric waste produced by the alloy ingot produced can be used for the production of other alloys. Production, improve the use efficiency of geometric waste, and can increase the pass rate of ingot flaw detection; control the hydrogen content of the melt, can greatly reduce the loose size of the ingot, and improve the pass rate of the oxide film on the fracture of the ingot and the pass rate of flaw detection. The preparation method provided by the invention can stably control the qualified rate of ingot flaw detection and fracture oxide film above 98%.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a high-strength aluminum alloy ingot and a preparation method thereof. Background technique [0002] According to the production of conventional high-strength aluminum alloy ingots, only the chemical composition is controlled to meet the requirements of technical standards. The Ti element in the prepared ingots accumulates and inherits to the plate, and Ti-containing inclusions appear in the fracture of the plate, which affects the pass rate of the oxide film on the fracture of the ingot ( Less than 93% at present); the ingot produced contains more Fe, Si compounds and is loose, which affects the qualified rate of ingot flaw detection (less than 92% at present). The unstable control of the hydrogen content of the high-strength aluminum alloy melt produced by the existing technology leads to a low pass rate of the oxide film at the fracture of the ingot and a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10B22D7/00C22C1/02C22C1/06
CPCC22C21/10C22C1/026C22C1/06B22D7/005
Inventor 朱敏陈向富
Owner SOUTHWEST ALUMINUM GRP
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