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Preparation method of intermetallic compound Al3-M particle reinforced aluminum matrix composite

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 failure to improve the wettability of reinforcement and aluminum melt, low mass fraction of composite materials, and poor particle distribution. Uniformity and other issues to achieve the effect of improving production and labor conditions, excellent mechanical properties, and simplifying the process

Active Publication Date: 2014-04-02
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stirring casting method has simple equipment and high production efficiency, but due to the poor wettability between the reinforcement and the aluminum melt, stirring cannot improve the wettability between the reinforcement and the aluminum melt, so the casting has more pores and the particle distribution is not good. Uniform, easy to form segregation
[0003] The in-situ self-generated reaction particles are synthesized in situ inside the matrix, and the interface of the matrix is ​​well bonded and clean; different types and different quantities of in-situ reinforced particles can be obtained, and the in-situ synthesis of reinforced particles combined with casting is simple and low in cost, but This method has the disadvantage that the mass fraction of the prepared composite material is not high

Method used

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Examples

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Effect test

Embodiment 1

[0028] An intermetallic compound Al 3 - A preparation method for Ti particle reinforced aluminum matrix composite material, comprising the following steps:

[0029] (1) Prepare aluminum powder and metal Ti powder at a molar ratio of 3:1 to make composite powder, add 0.2% stearic acid of the total weight of the composite powder to the composite powder, and then ball mill for 60 hours under the protection of argon atmosphere, with a ball-to-material ratio of 20 : 1, ball milling speed 300r / min;

[0030] (2) The ball-milled composite powder is baked in a vacuum oven at 130°C for 4 hours, and then cooled in the furnace;

[0031] (3) Melt 66wt% aluminum alloy and overheat to 800°C, keep it warm for use;

[0032] (4) Melt the remaining 34wt% aluminum alloy to semi-solid and add pure magnesium, then add 2.5% composite powder of the total mass of aluminum alloy into the semi-solid aluminum alloy melt under the protection of argon atmosphere, and stir while adding , stirring for a t...

Embodiment 2

[0035] An intermetallic compound Al 3 - A preparation method for Ti particle reinforced aluminum matrix composite material, comprising the following steps:

[0036] (1) Prepare aluminum powder and metal Ti powder at a molar ratio of 3:1 to make a composite powder, add 0.1% stearic acid of the total weight of the composite powder to the composite powder, and then ball mill for 65 hours under the protection of an argon atmosphere, with a ball-to-material ratio of 30 : 1, ball milling speed 500r / min;

[0037] (2) The ball-milled composite powder is baked in a vacuum oven at 100°C for 5 hours, and then cooled with the furnace;

[0038] (3) Melt 68wt% aluminum alloy and overheat to 830°C, keep it warm for use;

[0039](4) Melt the remaining 32wt% aluminum alloy to semi-solid and add pure magnesium, then add 3% composite powder of the total mass of aluminum alloy into the semi-solid aluminum alloy melt under the protection of argon atmosphere, and stir while adding , stirring for...

Embodiment 3

[0042] An intermetallic compound Al 3 -The preparation method of Zr particle reinforced aluminum matrix composite material, comprises the following steps:

[0043] (1) Prepare aluminum powder and metal Zr powder at a molar ratio of 3:1 to make a composite powder, add 0.2% stearic acid of the total weight of the composite powder to the composite powder, and then ball mill for 70 hours under the protection of an argon atmosphere, with a ball-to-material ratio of 20 : 1, ball milling speed 400r / min;

[0044] (2) The ball-milled composite powder is baked in a vacuum oven at 120°C for 4.5 hours, and then cooled with the furnace;

[0045] (3) Melt 63wt% aluminum alloy and overheat to 820°C, keep it warm for use;

[0046] (4) Melt the remaining 37wt% aluminum alloy to semi-solid and add pure magnesium, then add 2.5% composite powder of the total mass of aluminum alloy into the semi-solid aluminum alloy melt under the protection of argon atmosphere, and stir while adding , stirring...

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Abstract

The invention relates to a preparation method of an intermetallic compound Al3-M particle reinforced aluminum matrix composite and belongs to the technical field of aluminum matrix composite preparation and metal smelting. The invention aims at providing the preparation method of the intermetallic compound Al3-M particle reinforced aluminum matrix composite, and provides the intermetallic compound Al3-M particle reinforced aluminum matrix composite prepared by the method at the same time. The invention adopts the technical scheme that the preparation method of the intermetallic compound Al3-M particle reinforced aluminum matrix composite well solves the problem of no infiltration between an intermetallic compound reinforced particle and molten metal by a stepped method of firstly increasing the magnesium concentration in aluminum melt and adding the intermetallic compound particle.

Description

technical field [0001] A kind of intermetallic compound Al of the present invention 3 The invention discloses a method for preparing aluminum-based composite materials reinforced by M particles, which belongs to the technical fields of aluminum-based composite material preparation and metal smelting processing. Background technique [0002] At present, the preparation techniques and methods of particle-reinforced metal matrix composites are mainly powder metallurgy, squeeze casting, spray deposition, melt infiltration, in-situ reaction and stirring casting. The powder metallurgy method is to mechanically mix the reinforced particles with fine and pure metal powder, press them in a mold, and then heat them for sintering, so that the reinforced phase and the metal matrix are aggregated to form a reinforced particle / metal composite material. The advantage of the powder metallurgy method is that the metal matrix does not have to go through a high-temperature state of complete m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C21/00
Inventor 党惊知张文达潘保武侯击波郝红元毛红奎
Owner ZHONGBEI UNIV
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