Ultrahigh-plasticity aluminum alloy and preparing method thereof

An aluminum alloy and plasticity technology, applied in the field of ultra-high plasticity aluminum alloy and its preparation, can solve the problems of reducing the mechanical properties of the alloy, splitting the matrix, etc., and achieve the effects of improving production efficiency, meeting application requirements, and good tensile strength.

Pending Publication Date: 2020-11-24
YANTAI NANSHAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above results indicated that the in situ generated Mg 2 The sharp corners and corners of the Si phase are likely to cause stress concentration, leading to intergranular cracking, thereby forming crack sources, and then splitting the matrix, reducing the mechanical properties of the alloy, so it is necessary to improve the Mg 2 Form of Si

Method used

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  • Ultrahigh-plasticity aluminum alloy and preparing method thereof
  • Ultrahigh-plasticity aluminum alloy and preparing method thereof
  • Ultrahigh-plasticity aluminum alloy and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An ultra-high ductility aluminum alloy is composed of the following components by weight percentage: 0.8-1.2% of Mg, 0.4-0.8% of Si, 0.2-0.4% of Fe, 0.2-0.5% of Cu, and the rest is Al.

[0025] The ultra-high ductility aluminum alloy in this embodiment is made by following steps:

[0026] S1. Alloy smelting: According to 0.8-1.2% of Mg, 0.4-0.8% of Si, 0.2-0.4% of Fe, 0.2-0.5% of Cu, and the rest is Al, weigh appropriate amount of pure aluminum ingot, pure magnesium ingot, Al -Si master alloy, Al-Cu master alloy and Al-Fe master alloy are used as raw materials for batching, and the alloy ingredients are melted and cast into alloy ingots; in this embodiment, semi-continuous casting is used to prepare alloy ingots, and semi-continuous casting The alloy ingredients are preheated to 40-80°C first, then heated to 750-800°C for smelting, fully stirred after melting, left to stand, and then cooled to 700-750°C for casting.

[0027] S2, machining: the alloy ingot obtained in S...

Embodiment 2

[0031] 1) Alloy smelting: using pure aluminum ingots, pure magnesium ingots, Al-Si master alloys, Al-Cu master alloys and Al-Fe master alloys as raw materials, according to Mg0.8%, Si0.5%, Cu0.5%, Fe is 0.3%, and the rest is the weight percentage of Al for batching. The alloy batching is preheated to 50°C, and then heated to 760°C for smelting, fully stirred after melting, left to stand, and cooled to 720°C for casting.

[0032] 2) Machining: the alloy ingot is turned into a cylindrical extrusion billet with a diameter of 80 mm and a length of 100 mm.

[0033] 3) Extrusion forming: Preheat the extrusion billet and mold at 400°C for 1 hour before extrusion, and then press the extrusion temperature at 500°C, the extrusion ratio at 45, and the extrusion speed at 15m / min. Just take shape.

[0034] The mechanical properties of the deformed aluminum alloy material prepared in this example are specifically shown as the tensile yield strength at room temperature is 359 MPa, the tensi...

Embodiment 3

[0036] 1) Alloy smelting: using pure aluminum ingots, pure magnesium ingots, Al-Si master alloys, Al-Cu master alloys and Al-Fe master alloys as raw materials, according to Mg1.0%, Si0.6%, Cu0.2%, Fe is 0.4%, and the rest is the weight percentage of Al for batching. The alloy batching is preheated to 50°C, and then heated to 760°C for smelting, fully stirred after melting, left to stand, and cooled to 710°C for casting.

[0037] 2) Machining: the alloy ingot is turned into a cylindrical extrusion billet with a diameter of 80 mm and a length of 100 mm.

[0038] 3) Extrusion forming: Preheat the extrusion billet and mold at 400°C for 1 hour before extrusion, and then press the extrusion temperature at 510°C, extrusion ratio at 29, and extrusion speed at 15m / min. Just take shape.

[0039] The mechanical properties of the aluminum alloy deformed material prepared in this example are specifically shown as the tensile yield strength at room temperature is 342 MPa, the tensile stren...

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Abstract

The invention relates to the technical field of metal materials and machining technology of the metal materials and discloses an ultrahigh-plasticity aluminum alloy and a preparing method thereof. Thealuminum alloy comprises, by weight percent, 0.8%-1.2% of Mg, 0.4%-0.8% of Si, 0.2%-0.4% of Fe, 0.2%-0.5% of Cu, and the balance Al. The preparing method of the aluminum alloy comprises several processes of burdening, smelting, casting, homogenizing treatment and extruding deformation treatment. When the aluminum alloy is prepared, the aluminum alloy composition components and the use amounts ofall the components are reasonably controlled, a wrought aluminum alloy microstructure with the structure still being of the single phase is obtained, and in addition, the structure is uniform; and dueto a solution strengthening effect of various elements, the phenomenon that elements are excessively added, a second phase is generated, and the subsequent extruding deformation treatment process ishindered is avoided, the problem of difficult aluminum alloy extruding is solved, grain growth in the extruding process is avoided, and the high-toughness aluminum alloy with the small and uniform alloy microstructure is obtained finally. The method is simple and easy to operate, low in requirement for equipment, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of metal materials and processing thereof, in particular to an ultrahigh plasticity aluminum alloy and a preparation method thereof. Background technique [0002] Increasingly serious environmental problems have pushed new energy vehicles to a high-speed channel of development. As a new type of green and pollution-free travel vehicle, the overall weight of the vehicle body is one of the important factors restricting its development. The application of lightweight technology will greatly reduce vehicle weight. The battery module is the core component of the car, and the battery tray, as the support of the entire battery module, has also experienced innovative development from materials to processes. It has a battery tray with a variety of functional systems, higher reliability and more functions. will be the future direction of development. Extruded aluminum alloy battery tray is currently the mainstream ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22F1/047
CPCC22C1/026C22C1/03C22C21/08C22F1/047
Inventor 程雪婷房洪杰孔德斌马旭张小刚孙杰汪洪波
Owner YANTAI NANSHAN UNIV
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