Preparation method of ultrahigh-strength aluminum alloy material
By adding microalloys in the preparation process of aluminum alloy ingots and combining electromagnetic stirring and ultrasonic vibration, the problems of low strength and long aging time in the existing aluminum alloy preparation technology are solved, and the efficient preparation of ultra-high strength aluminum alloy materials is achieved.
Patent Information
- Application Number
- CN202510197017.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-05-30
AI Technical Summary
The aluminum alloy obtained by the existing aluminum alloy preparation technology has low strength and aging time. The homogenization treatment is not carried out during the preparation of the ingot, resulting in a long and cumbersome preparation process.
By adding microalloy Ce, Sc and Zr during the preparation of the ingot, combined with electromagnetic stirring and ultrasonic vibration, an aluminum alloy ingot without casting defects and an impurity content of less than 0.1%, followed by shaping treatment, solid solution quenching and aging treatment to obtain ultra-high strength aluminum alloy material.
The high-strength preparation of aluminum alloy is achieved, the preparation time is shortened, the preparation efficiency is improved, and the grain refinement, no casting defects such as pores, and shrinkage are provided, providing a good raw material foundation.
Smart Images
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Abstract
Claims
1. A method for preparing an ultra-high strength aluminum alloy material, characterized in that: The following steps are involved: S10, obtaining a standard composition of a target aluminum alloy, adding Ce, Sc and Zr to the standard composition of the target aluminum alloy, melting and electromagnetically stirring, to obtain a melt; The melt is cooled, and continuous ultrasonic vibration is performed during the cooling process to obtain an aluminum alloy ingot with no casting defects and an impurity content of less than 0.1%; S20, shaping the aluminum alloy ingot according to the target aluminum alloy shape to obtain an aluminum alloy initial material billet; S30, subjecting the aluminum alloy initial material billet to solution quenching and aging treatment in sequence to obtain an ultra-high strength aluminum alloy material.
2. The method for preparing the ultra-high strength aluminum alloy material according to claim 1, characterized in that: In step S10, the target aluminum alloy is any one of a 2xxx series aluminum alloy, a 6xxx series aluminum alloy, or a 7xxx series aluminum alloy; Wherein, in the 2xxx series aluminum alloy, the mass fraction of Ce is 0.1-0.3%, the mass fraction of Sc is 0.07-0.2%, and the mass fraction of Zr is 0.02-0.07%; In the 6xxx series aluminum alloy, the mass fraction of Ce is 0.15-0.35%, the mass fraction of Sc is 0.06-0.16%, and the mass fraction of Zr is 0.02-0.06%; In the 7xxx series aluminum alloy, the mass fraction of Ce is 0.1-0.3%, the mass fraction of Sc is 0.05-0.15%, and the mass fraction of Zr is 0.01-0.03%.
3. The method for preparing an ultra-high strength aluminum alloy material according to claim 1, characterized in that: In step 10, the electromagnetic stirring rate is 120-150 rpm, stirring is 2-3 times, 5-10 min / time, and the interval between two adjacent electromagnetic stirrings is 15-30 min; The frequency of the ultrasonic vibration is 20 to 30 Hz and lasts for 20 to 30 minutes.
4. The method for preparing the ultra-high strength aluminum alloy material according to any one of claims 1 to 3, characterized in that: In step S30, the obtaining of the ultra-high strength aluminum alloy material is obtaining an ultra-high strength aluminum alloy plate; Among them, after the 2xxx aluminum alloy initial material billet is solution quenched, it is kept at 150-215°C for 4-24 hours and then cooled to obtain an ultra-high strength 2xxx series aluminum alloy plate; after the 6xxx aluminum alloy initial material billet is solution quenched, it is kept at 154-182°C for 8-18 hours and then cooled to obtain an ultra-high strength 6xxx series aluminum alloy plate; after the 7xxx aluminum alloy initial material billet is solution quenched, it is kept at 115-165°C for 2-25 hours and then cooled to obtain an ultra-high strength 7xxx series aluminum alloy plate.
5. The method for preparing the ultra-high strength aluminum alloy material according to any one of claims 1 to 3, characterized in that: In step S30, the ultra-high strength aluminum alloy material is obtained by obtaining an ultra-high strength aluminum alloy bar; Among them, after the 2xxx series aluminum alloy initial material billet is solution quenched, it is kept at 146-215°C for 4-24 hours and then cooled to obtain ultra-high strength 2xxx series aluminum alloy rods; after the 6xxx series aluminum alloy initial material billet is solution quenched, it is kept at 155-195°C for 4-15 hours and then cooled to obtain ultra-high strength 6xxx series aluminum alloy rods; after the 7xxx series aluminum alloy initial material billet is solution quenched, it is kept at 97-165°C for 2-25 hours and then cooled to obtain ultra-high strength 7xxx series aluminum alloy rods.
6. The method for preparing the ultra-high strength aluminum alloy material according to any one of claims 1 to 3, characterized in that: In step S30, obtaining the ultra-high strength aluminum alloy material includes subjecting the aluminum alloy initial material billet to solution quenching, aging treatment and deformation treatment in sequence.
7. The method for preparing the ultra-high strength aluminum alloy material according to claim 6, characterized in that: The deformation amount of the deformation treatment is 1 to 10%; the grain size of the crystals in the aluminum alloy material after the deformation treatment is 5 to 20 μm.
8. The method for preparing the ultra-high strength aluminum alloy material according to claim 7, characterized in that: The ultra-high strength aluminum alloy material is obtained by obtaining an ultra-high strength aluminum alloy bar; The aging treatment is as follows: the 2xxx series aluminum alloy initial material billet is kept at 70-200°C for 1min-24h and then cooled to obtain an ultra-high strength 2xxx series aluminum alloy bar; the 6xxx series aluminum alloy initial material billet is kept at 80-200°C for 1min-15h and then cooled to obtain an ultra-high strength 6xxx series aluminum alloy bar; the 7xxx series aluminum alloy initial material billet is kept at 60-200°C for 1min-12h and then cooled to obtain an ultra-high strength 7xxx series aluminum alloy bar; The ultra-high strength 2xxx series, 6xxx series or 7xxx series aluminum alloy bar has nanoclusters with a particle size of 1 to 10 nm, and the number density of the nanoclusters is greater than or equal to 1×10 22 m -3 .
9. The method for preparing the ultra-high strength aluminum alloy material according to claim 7, characterized in that: The obtaining of the ultra-high strength aluminum alloy material is obtaining an ultra-high strength aluminum alloy plate; The aging treatment is as follows: the 2xxx series aluminum alloy initial material billet is kept at 70-200°C for 1min-24h and then cooled to obtain an ultra-high strength 2xxx series aluminum alloy plate; the 6xxx series aluminum alloy initial material billet is kept at 80-200°C for 1min-18h and then cooled to obtain an ultra-high strength 6xxx series aluminum alloy plate; the 7xxx series aluminum alloy initial material billet is kept at 60-200°C for 1min-12h and then cooled to obtain an ultra-high strength 7xxx series aluminum alloy plate; The ultra-high strength 2xxx series, 6xxx series or 7xxx series aluminum alloy plate has nanoclusters with a particle size of 1 to 10 nm, and the volume fraction of the nanoclusters is greater than 1×10 22 m -3 .
10. An ultra-high strength aluminum alloy material, characterized in that: The method is obtained by the preparation method described in any one of claims 1 to 9.