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A method of preparing aluminum-rich intermetallic compound reinforcement prefabricated block by using 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: 2018-04-17
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 aluminum-rich intermetallic compound reinforcement by using a large plastic deformation process includes the following steps:

[0021] (1) Prepare composite powders of aluminum powder and metal titanium powder at an atomic ratio of 3:1, and put them in a ball mill under the protection of an argon atmosphere. The ball mill speed is 300r / min, the ball-to-material ratio is 20:1, and the milling time is 50h;

[0022] (2) Pre-extrude the ball-milled composite powder into a block on the extruder, the extrusion pressure is 50MPa;

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

[0024] (4) The pre-extruded block after preheating in step (3) is subjected to a large plastic deformation process and equal-diameter corner extrusion, so that the composite metal powder un...

Embodiment 2

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

[0027] (1) Prepare composite powders of aluminum powder and metal zirconium powder according to the atomic ratio of 3:1, and put them in the ball mill under the protection of argon atmosphere. The ball mill speed is 600r / min, the ball-to-material ratio is 40:1, and the milling time is 10h;

[0028] (2) Pre-extrude the ball-milled composite powder into a block on the extruder, and the extrusion pressure is 100MPa;

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

[0030] (4) The pre-extruded block preheated in step (3) is subjected to a large plastic deformation process and high-pressure rotary extrusion, so that the composite metal pow...

Embodiment 3

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

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

[0034] (2) Pre-extrude the ball-milled composite powder into a block on the extruder, and the extrusion pressure is 80MPa;

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

[0036] (4) The pre-extruded block after preheating in step (3) is subjected to a large plastic deformation process and equal-diameter corner extrusion, so that the compos...

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Abstract

The invention discloses a method for preparing aluminum-rich intermetallic compound reinforced body prefabricated blocks by using a large plastic deformation process, which belongs to the technical field of aluminum-based composite material preparation; the technical problem to be solved is to solve the influence of the oxide film on the surface of the composite powder after ball milling To solve the problem of wetting with the melt, provide a method of large plastic deformation to make the prefabricated block of composite powder pre-pressed into blocks after ball milling undergo strong deformation, so that the oxide film on the surface of the composite powder is broken, and the wetting of the composite powder and the melt is improved. Reactivity and reactivity; the composite powder reinforcement prefabricated block for aluminum matrix composites prepared by stirring method is easier to disperse after adding aluminum melt, the reinforcing particles and aluminum melt have good wettability, and the composite material prepared at conventional melting temperature has Good interface and mechanical properties.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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