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A method for preparing particle-reinforced aluminum matrix composites by hot pressing and sintering in atmospheric atmosphere

A particle-reinforced aluminum and hot-pressing sintering technology, applied in the field of powder metallurgy, can solve the problems of low production efficiency, high cost, complex process, etc., and achieve the effects of low cost, high yield and simple process

Active Publication Date: 2020-11-10
QIQIHAR XIANGKE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to overcome the disadvantages of complex process, high cost and low production efficiency in preparing composite materials by hot pressing and sintering, and provides a method for preparing particle-reinforced aluminum-based composite materials by hot pressing and sintering in atmospheric atmosphere

Method used

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  • A method for preparing particle-reinforced aluminum matrix composites by hot pressing and sintering in atmospheric atmosphere
  • A method for preparing particle-reinforced aluminum matrix composites by hot pressing and sintering in atmospheric atmosphere
  • A method for preparing particle-reinforced aluminum matrix composites by hot pressing and sintering in atmospheric atmosphere

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specific Embodiment approach 1

[0017] Specific implementation mode 1: In this implementation mode, a method for preparing particle-reinforced aluminum-based composite materials by hot pressing and sintering under atmospheric atmosphere is carried out according to the following steps:

[0018] 1. Ball milling and powder mixing: the ceramic particle reinforcement and the aluminum matrix are ball milled and mixed to obtain a mixed powder;

[0019] 2. Preparation of prefabricated body by cold pressing: use graphite mold to compact the mixed powder step by step to obtain a prefabricated body;

[0020] 3. Carry out hot-press sintering on the prefabricated body under atmospheric atmosphere. After the sintering is completed, the graphite mold is transferred to the air, naturally cooled to room temperature, and the particle-reinforced aluminum matrix composite is obtained by demoulding.

[0021] Washing and drying the reinforced body described in this embodiment is one of the factors affecting the quality of the mat...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that: the ceramic particle reinforcement described in Step 1 is washed with water before ball milling. Others are the same as the first embodiment.

specific Embodiment approach 3

[0025] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the water washing is specifically carried out in the following steps: wash the ceramic particle reinforcement in water at a temperature of 30-45°C for 3-5 times to obtain a paste Put the paste in a stainless steel tray, transfer it to a drying box for drying, the drying temperature is 60-90°C, and the drying time is greater than 48h; the volume ratio of the ceramic particle reinforcement to water is 1: (2~4). Others are the same as those in Embodiment 1 or 2.

[0026] In this embodiment, the volume ratio of water to ceramic particle reinforcement should be higher than 2:1.

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Abstract

The invention relates to a method for preparing a particle-reinforced aluminum-based composite material adopting hot-pressing sintering under an atmospheric atmosphere. The invention belongs to the field of powder metallurgy, in particular to the method for preparing the particle-reinforced aluminum-based composite material adopting hot-pressing sintering under the atmospheric atmosphere. The method aims to overcome the defects of complex process, high cost and low production efficiency of an existing composite material preparation process adopting the hot-pressing sintering. The method comprises the following steps that 1, ball-milling is carried out to mix powder, specifically, the ball-milling is carried out on ceramic particle reinforcement and an aluminum-based body for mixing the powder to obtain the mixed powder; 2, cold pressing is carried out to prepare a prefabricated body, specifically, step-by-step compaction is carried out on the mixed powder by adopting a graphite die soas to obtain the prefabricated body; and 3, the hot-pressing sintering is carried out on the prefabricated body under the atmospheric atmosphere, the graphite die is transferred into the air after thesintering is completed till the die is naturally cooled to the room temperature, and the die is removed to obtain the particle-reinforced aluminum-based composite material. The method is used for preparing the particle-reinforced aluminum-based composite material.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, and in particular relates to a method for preparing particle-reinforced aluminum-based composite materials by hot-pressing and sintering in an atmospheric atmosphere. Background technique [0002] Particle reinforced aluminum matrix composites have low density, high specific strength and high specific stiffness, excellent wear resistance and excellent high temperature resistance and so on. Due to the designability of particle-reinforced aluminum matrix composites, the excellent properties of the matrix aluminum alloy and particles can be fully utilized. Therefore, a low-cost, simple process, and industrializable preparation process has always been a research hotspot. [0003] Vacuum hot pressing sintering is a widely used method, which belongs to powder metallurgy. This method can successfully prepare composite materials with lower reinforcement volume fraction, higher density and better quality...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C21/00
CPCC22C1/0416C22C1/05C22C21/00
Inventor 池海涛陈国钦
Owner QIQIHAR XIANGKE NEW MATERIAL CO LTD
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