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Method for preparing aluminum-rich intermetallic compound reinforcement precast block through large plastic deformation process

An intermetallic compound and large plastic deformation technology, which is applied in the field of aluminum-based composite material preparation, can solve the problems of the oxide film on the surface of the composite powder affecting wetting, etc., to improve the wettability and reactivity of the composite powder and the melt, and make it easier to disperse , good wettability effect

Active Publication Date: 2017-03-08
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the deficiencies of the prior art, and the technical problem to be solved is to solve the problem that the oxide film on the surface of the composite powder after ball milling affects its wetting with the melt, and provides a method of large plastic deformation to make the pre-pressed powder after ball milling The prefabricated blocks of the composite powder are strongly deformed to break the oxide film on the surface of the composite powder and improve the wettability and reactivity of the composite powder and the melt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a prefabricated block of an aluminum-rich intermetallic compound reinforcement using a large plastic deformation process, comprising the following steps:

[0021] (1) Prepare composite powder with aluminum powder and metal titanium powder according to the atomic ratio of 3:1, put it into a ball mill and mill it under the protection of argon atmosphere, the ball milling speed is 300r / min, the ball-to-material ratio is 20:1, and the ball milling time is 50h;

[0022] (2) The composite powder after ball milling is pre-extruded into a block on the extruder, and the extrusion pressure is 50MPa;

[0023] (3) Preheat the pre-extruded block prepared in step (2) in a vacuum furnace or an electric furnace protected by an argon atmosphere. The preheating temperature is 400°C and the preheating time is 0.5h;

[0024] (4) The pre-extruded block preheated in step (3) is subjected to a large plastic deformation process, and isometrically and angularly extruded, ...

Embodiment 2

[0026] A method for preparing a prefabricated block of an aluminum-rich intermetallic compound reinforcement using a large plastic deformation process, comprising the following steps:

[0027] (1) Prepare composite powder with aluminum powder and metal zirconium powder according to the atomic ratio of 3:1, and put it into a ball mill for ball milling under the protection of argon atmosphere, the ball milling speed is 600r / min, the ball to material ratio is 40:1, and the ball milling time is 10h;

[0028] (2) The composite powder after ball milling is pre-extruded into a block on the extruder, and the extrusion pressure is 100MPa;

[0029] (3) Preheat the pre-extruded block prepared in step (2) in a vacuum furnace or an electric furnace protected by an argon atmosphere. The preheating temperature is 300°C and the preheating time is 2 hours;

[0030] (4) The pre-extruded block preheated in step (3) is subjected to a large plastic deformation process and high-pressure rotary extr...

Embodiment 3

[0032] A method for preparing a prefabricated block of an aluminum-rich intermetallic compound reinforcement using a large plastic deformation process, comprising the following steps:

[0033] (1) Aluminum-silicon alloy powder and metal scandium powder are prepared into composite powder according to the atomic ratio of 3:1, put into a ball mill and ball milled under the protection of argon atmosphere, the ball milling speed is 400r / min, the ball-to-material ratio is 30:1, and the ball milling time is 20h;

[0034] (2) The composite powder after ball milling is pre-extruded into a block on the extruder, and the extrusion pressure is 80MPa;

[0035] (3) Preheat the pre-extruded block prepared in step (2) in a vacuum furnace or an electric furnace protected by an argon atmosphere. The preheating temperature is 350°C and the preheating time is 1 hour;

[0036] (4) The pre-extruded block preheated in step (3) is subjected to a large plastic deformation process, and isometrically an...

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PUM

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Abstract

The invention relates to a method for preparing an aluminum-rich intermetallic compound reinforcement precast block through a large plastic deformation process, and belongs to the technical field of aluminum base composite material preparing. The technical problem that wetting of composite powder and a melt is influenced by a composite powder surface oxidation film obtained after ball milling is solved; through a large plastic deformation manner, the composite powder precast block pressed into the block in advance after ball milling is subject to strong deformation, the composite powder surface oxidation film is crushed, and the wettability and the reactivity of the composite powder and the melt are improved; and the compound reinforcement precast block for the aluminum base composite material prepared with a stirring method is more easily scattered after being added into the aluminum melt, the wettability of reinforced particles and the aluminum melt is good, and the composite material prepared at the conventional melting temperature has the good interface and mechanical property.

Description

technical field [0001] The invention discloses a method for preparing a prefabricated block of an aluminum-rich intermetallic compound reinforcement by using a large plastic deformation process, and belongs to the technical field of aluminum-based composite material preparation. Background technique [0002] Aluminum matrix composites are mainly used in the manufacture of pistons and other auto parts in automobile production. In recent years, most researchers in China have basically used in-situ particle-reinforced aluminum matrix composites. In-situ aluminum matrix composites have many strengthening phases, wide design, fine grains, good comprehensive performance, and the combination of reinforcement and matrix interface. It has the advantages of strong and high bonding strength, relatively low cost, and can be used for near-net casting. Representative composite materials are TiB 2 and Al 2 o 3 Particle reinforced aluminum matrix composites. In addition, dual-phase or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C16/00C22C28/00C22C1/04B22F3/20
CPCC22C1/0416C22C1/0458C22C16/00C22C21/00C22C28/00B22F3/20B22F2003/208C22C1/047
Inventor 张文达杨晶任霁萍徐宏
Owner ZHONGBEI UNIV