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Method for preparing aluminum-rich intermetallic compound reinforced aluminum-based composite material

A technology of intermetallic compounds and aluminum-based composite materials, which is applied in the fields of aluminum-based composite material preparation and metal smelting processing, can solve the problems of high brittleness, poor interface, and high melt heating temperature, and achieve good interface, low raw material cost, The effect of low melting temperature

Active Publication Date: 2014-07-02
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the materials used for the vehicle engine case gradually unable to meet the requirements of the high temperature performance of the vehicle engine power increase, solve the problem existing in the prior art with the use of additional ceramic particles Al 2 o 3 , SiC, etc. have disadvantages such as poor interface, high brittleness, other by-products caused by intermetallic compounds generated by in-situ reactions, and excessively high melt heating temperature. Aluminum intermetallic compound Al 3 M particle reinforced aluminum matrix composite material preparation method, the composite material for engine case prepared at conventional melting temperature has good interface and mechanical properties

Method used

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Embodiment 1

[0032] A method for preparing an aluminum-rich intermetallic compound reinforced aluminum matrix composite material, comprising the steps of:

[0033] (1) Prepare composite powder with aluminum powder and titanium powder at an atomic ratio of 3:1, add 0.2% of stearic acid to the total mass of the composite powder, mix it, put it into a ball mill, and mill it under the protection of an argon atmosphere. The ball milling speed is 500r / min. Ball to material ratio 40:1, ball milling time 20h;

[0034] (2) Melting the aluminum-silicon alloy to a temperature of 730°C, and refining at this temperature with a refining agent accounting for 0.3% of the total mass of the metal melt;

[0035] (3) Under the protection of argon atmosphere, preheat the composite powder prepared in step (1), which accounts for 3% of the total melt mass, to 300°C and then directly add it to the metal melt prepared in step 3. The temperature of the metal melt is 730°C , stirring while adding, stirring speed 50...

Embodiment 2

[0038] A method for preparing an aluminum-rich intermetallic compound reinforced aluminum matrix composite material, comprising the steps of:

[0039] (1) Prepare composite powder with aluminum powder and zirconium powder according to the atomic ratio of 3:1, then add stearic acid accounting for 0.1% of the total mass of the composite powder, mix it, put it into a ball mill and mill it under the protection of argon atmosphere, the ball milling speed is 600r / min, Ball to material ratio 30:1, ball milling time 50h;

[0040] (2) Melting the aluminum-silicon alloy to a temperature of 750°C, and refining at this temperature with a refining agent accounting for 0.3% of the total mass of the metal melt;

[0041] (3) Preheat the composite powder prepared in step (1), which accounts for 5% of the total melt mass, to 400°C under the protection of argon atmosphere, and then directly add it to the metal melt prepared in step 3, and the temperature of the metal melt is 750°C X-ray diffrac...

Embodiment 3

[0043] A method for preparing an aluminum-rich intermetallic compound reinforced aluminum matrix composite material, comprising the steps of:

[0044] (1) Prepare composite powder by aluminum powder and zirconium powder according to the atomic ratio of 3:1, then add stearic acid accounting for 0.1% of the total mass of the composite powder, mix it, put it into a ball mill and mill it under the protection of argon atmosphere, the ball milling speed is 600r / min, Ball to material ratio 40:1, ball milling time 20h;

[0045] (2) Put the ball-milled composite powder into a vacuum oven and bake at 600°C for 2 hours to completely convert the composite powder into Al 3 The M intermetallic compound particles are then cooled with the furnace and set aside;

[0046] (3) Melting the aluminum-silicon alloy to a temperature of 750°C, and refining at this temperature with a refining agent accounting for 0.3% of the total mass of the metal melt;

[0047] (4) Under the protection of argon atm...

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Abstract

The invention provides a method for preparing an aluminum-rich intermetallic compound reinforced aluminum-based composite material, and belongs to technical field of aluminum-based composite material preparation and metal smelting technology. The technical problem to be solved is to provide a method for preparing the aluminum-rich intermetallic compound reinforced aluminum-based composite material by use of a direct addition method. In the method, ball milled composite metal powder is directly added or converted into intermetallic compound granules and is added into an aluminum alloy fused mass to obtain the aluminum-based composite material with good interface and excellent mechanical properties.

Description

technical field [0001] The invention discloses a method for preparing aluminum-based composite materials reinforced by aluminum-rich intermetallic compounds, which belongs to the technical fields of aluminum-based composite material preparation and metal smelting and processing. Background technique [0002] Aluminum matrix composites are composite materials that use aluminum or aluminum alloy as the matrix and ceramic particles or metal particles, whiskers or short fibers, and long fibers as reinforcements. Among them, particle-reinforced aluminum-based composite materials have broad application prospects in the fields of automobiles and aerospace due to their simple preparation process, easy processing and forming, and low cost. And the particle-reinforced aluminum matrix composite material solves the problem of expensive preparation of fiber-reinforced aluminum matrix composite materials, and the material is isotropic, which overcomes problems such as fiber damage, uneven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C21/00
Inventor 徐宏张文达杨晶刘云韩涛任霁萍
Owner ZHONGBEI UNIV
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