Preparation method of micro-nano particle reinforced aluminium matrix composite

A technology of micro-nano particles and reinforced aluminum matrix is ​​applied in the field of preparation of micro-nano particle reinforced aluminum matrix composite materials, which can solve the problems of high cost, low density, complicated equipment and the like, and achieves low cost, uniform distribution, and preparation process. simple effect

Active Publication Date: 2015-04-08
天津海力特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high cost, low density and complicated equipment
However, the preparation of particle-reinforced a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Preparation of 5wt% SiC-2024 aluminum matrix composite

[0016] (1) Mix 950g of 50-75μm 2024 aluminum alloy powder and 50g of 0.1μm SiC. The mixed powder is wet-milled on a planetary ball mill with a rotation speed of 200r / min for 10 hours, and the ball-to-material ratio is 20:1. The medium is acetone;

[0017] (2) Put the obtained composite powder after high-energy ball milling into a vacuum drying oven at 30° C. for 4 hours, and grind the dried powder with a mortar. The particle size of the ground powder is the same as that of the aluminum-based alloy powder in the raw material Same granularity;

[0018] (3) Place the dry and sieved composite powder in a stainless steel container with a controlled sintering atmosphere, and then place it in a resistance furnace under H 2 Sintering under the atmosphere, the heating rate of the resistance furnace is 5°C / min, after rising to 620°C, under the condition of heat preservation, use the ultrasonic vibration device ...

Embodiment 2

[0019] Example 2: Preparation of 10wt% SiC-2024 aluminum matrix composite

[0020] (1) Mix 900g of 100μm 2024 aluminum alloy powder with 100g of 2μm SiC, and wet-mill the mixed powder on a planetary ball mill with a rotation speed of 200r / min for 12 hours, the ball-to-material ratio is 20:1, and the ball-milling medium is acetone ;

[0021] (2) Put the obtained composite powder after high-energy ball milling into a vacuum oven at 30° C. to dry for 6 hours, and grind the dried powder with a mortar. The particle size of the ground powder is the same as that of the aluminum-based alloy powder in the raw material. Same granularity;

[0022] (3) Put the dried and screened composite powder in a stainless steel container with a controllable sintering atmosphere, and then place it in a resistance furnace for sintering under a high-purity Ar atmosphere. The heating rate of the resistance furnace is 5°C / min, rising to 620°C Finally, in the case of heat preservation, use an ultrasonic ...

Embodiment 3

[0023] Example 3: Preparation of 10wt% SiC-7075 aluminum matrix composite

[0024] (1) Mix 900g of 30μm 7075 aluminum alloy powder and 100g of 2μm SiC. The mixed powder is wet-milled on a planetary ball mill with a rotation speed of 200r / min for 24 hours, the ball-to-material ratio is 20:1, and the ball-milling medium is acetone ;

[0025] (2) Put the obtained composite powder after high-energy ball milling into a vacuum drying oven at 30° C. for 10 hours, and grind the dried powder with a mortar. The particle size of the ground powder is the same as that of the aluminum-based alloy powder in the raw material Same granularity;

[0026] (3) Place the dried and screened composite powder in a stainless steel container with a controllable sintering atmosphere, and then place it in a resistance furnace in high-purity N 2 Sintering under the atmosphere of the resistance furnace, the heating rate of the resistance furnace is 5°C / min. After rising to 570°C, under the condition of he...

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PUM

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Abstract

The invention provides a preparation method of a micro-nano particle reinforced aluminium matrix composite and belongs to the field of an aluminium matrix composite preparation technology. The method comprises the following steps: carrying out high-energy ball milling on powdery aluminium base alloy and reinforcement powder; carrying out vacuum drying on the prepared composite powder after the end of ball milling and sieving; and carrying out supersonic vibration on the dried and sieved composite powder and carrying out pressureless sintering on the dispersible powder by controlling sintering atmosphere so as to prepare a fully-densified powder metallurgy aluminum matrix composite blank, and carrying out hot working such as extrusion, rolling, die forging and the like on the blank so as to obtain the required aluminium matrix composite. By a brand-new activated sintering densification technology, the composite powder directly undergoes supersonic vibration and densification sintering under atmosphere protection without pressing so as to prepare the fully-densified micro-nano particle reinforced aluminium matrix composite blank. The prepared aluminium matrix composite has uniform reinforcement phase distribution and excellent product performance. The method has no limit in size and shape of the product, is low-cost and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of preparation of aluminum-based composite materials, in particular to a method for preparing micro-nano particle-reinforced aluminum-based composite materials. Background technique [0002] In recent years, with the development of science and technology, in the technical fields of aviation, aerospace, electronics, communications, military industry, etc., the requirements for materials have been increasing. Traditional single-structure materials have been difficult to meet the needs of light weight and high strength. It has become an important direction of material development. Aluminum matrix composites have the characteristics of high specific strength, high specific modulus, good wear resistance, dimensional stability, and small thermal expansion coefficient, so they are increasingly valued by domestic and foreign research. [0003] Composite preparation technology is the key to obtain good composite effe...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C21/00
Inventor 郭志猛叶安平曹慧钦罗骥陈存广石韬
Owner 天津海力特新材料有限公司
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