A kind of aluminum matrix composite material and preparation method thereof

An aluminum-based composite material and a composite material technology are applied in the field of aluminum-based composite materials and their preparation, which can solve the problems of reduced fluidity of composite materials, low yield of aluminum-based composite materials, and scrapping, etc. The effect of good quality and simple process flow

Active Publication Date: 2020-12-11
福建祥鑫股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Hot extrusion deformation is the main technical means to improve material quality, reduce machining allowance and reduce production cost. However, when the reinforcement is added to the aluminum alloy matrix to prepare a composite material, the fluidity of the composite material is significantly reduced. The interface between them is very easy to form stress concentration during the extrusion process, which will lead to the formation of a large number of defects inside the composite material, resulting in low yield of aluminum matrix composite materials, or even scrapped

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  • A kind of aluminum matrix composite material and preparation method thereof
  • A kind of aluminum matrix composite material and preparation method thereof
  • A kind of aluminum matrix composite material and preparation method thereof

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preparation example Construction

[0031] A method for preparing an aluminum-based composite material, the steps comprising:

[0032] (1) Surface treatment: first, wash the first boron carbide powder and the second boron carbide powder calculated according to the above ratio with water. Remove the inner and upper layer of water; repeat the above steps for 2 to 3 times; put the cleaned powder in a drying box for drying, the drying temperature is 40 ° C ~ 60 ° C, and the holding time is 18 h ~ 24 h; after drying The powder is heated in a furnace at a temperature of 400°C to 500°C, and the holding time is 1h to 2h to soften the surface of the particles, then take it out and cool it to room temperature for later use;

[0033] (2) Ball milling and mixing: the boron carbide powder obtained in step (1) is mixed with the first aluminum alloy powder, placed in a ball mill, and the speed of the ball mill is kept at 250-350 rpm for 2h-3h, Then add the second aluminum alloy powder into the ball mill and mix, keep the spee...

Embodiment 1

[0040] The aluminum-based composite material in this embodiment comprises 1% boron carbide and 99% aluminum alloy by volume percentage. The boron carbide particles include the first boron carbide with D50=15μm and the second boron carbide with D50=0.5μm. The volume ratio of the two specifications of boron carbide is 7:1; the aluminum alloy powder includes D 50 The first aluminum alloy and the average grain size D of 10 μm 50 The second aluminum alloy is 1 μm, the volume ratio of the two specifications of the aluminum alloy is 8:1, and the aluminum alloy matrix is ​​6 series aluminum alloy. Composite material is carried out according to the following steps in the present embodiment:

[0041] (1) Surface treatment of boron carbide particles: Firstly, wash the boron carbide powders of two specifications with water. The water body is removed, and this is repeated twice, and the cleaned powder is removed and placed in a drying box for drying. The temperature of the drying box is ...

Embodiment 2

[0048] The aluminum-based composite material in this embodiment comprises 10% boron carbide and 90% aluminum alloy by volume percentage. The boron carbide particles include the first boron carbide with D50=15μm and the second boron carbide with D50=0.5μm. The volume ratio of the two specifications of boron carbide is 8:1; the aluminum alloy powder includes D 50 The first aluminum alloy and the average grain size D of 10 μm 50 The second aluminum alloy is 1 μm, the volume ratio of the two specifications of the aluminum alloy is 7:1, and the aluminum alloy matrix is ​​6 series aluminum alloy. Composite material is carried out according to the following steps in the present embodiment:

[0049] (1) Surface treatment of boron carbide particles: Firstly, wash the boron carbide powders of two specifications with water. The water body is removed, and this is repeated twice, and the cleaned powder is removed and placed in a drying box for drying. The temperature of the drying box is...

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Abstract

The invention discloses an aluminum-based composite material and a preparation method thereof. The composite material comprises 1%-15% boron carbide and 85%-99% aluminum alloy by volume percentage. The preparation method includes: surface treatment, ball milling and powder mixing, sintering, uniform aftertreatment, hot extrusion and heat treatment. The invention can realize the preparation of high-quality, flexible interface aluminum-based composite materials, and realize the preparation of high-quality aluminum-based composite material profiles by optimizing the heat treatment process of materials and the processing engineering of extruded profiles. The process flow is simple and the cost is low. , Composite materials are of good quality and high yield.

Description

technical field [0001] The invention relates to the technical field of aluminum-based composite materials, in particular to an aluminum-based composite material and a preparation method thereof. Background technique [0002] With the rapid development of industrial fields such as aerospace, national defense, automobile and transportation, the performance development of traditional and metal alloys such as aluminum alloys and magnesium alloys is approaching the limit, and the lightweight requirements in these fields are becoming more and more stringent. Therefore, traditional Alloys are at risk of being eliminated. Aluminum matrix composites have received extensive attention due to their high specific stiffness, high specific strength, excellent high temperature resistance, and creep resistance. Among them, boron carbide reinforced aluminum is a composite material with great development potential. The main reason is that boron carbide not only has high hardness and high modu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/05C22F1/04B22F1/00C01B32/956B22F3/14B22F3/20B22F3/24
CPCC22C21/00C22C32/0057C22C1/05C22F1/04C01B32/956B22F3/14B22F3/20B22F3/24B22F2003/208B22F2003/248B22F2998/10B22F1/052B22F2009/043B22F3/02
Inventor 黄铁明
Owner 福建祥鑫股份有限公司
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