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A kind of endogenous particle hybrid reinforced aluminum matrix composite material and its preparation method

A composite material and reinforced aluminum-based technology, which is applied in the preparation field of composite material technology, can solve the problems of inability to realize large-scale production, complex preparation process, high raw material cost, etc., achieve good mechanical properties and forming ability, simple process, and particle size evenly distributed effect

Active Publication Date: 2019-03-29
赵遵成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material of this method is aluminum or aluminum alloy, TiO 2 And B powder, the preparation of the material is completed through four steps of powder mixing, cold pressing, sintering and extrusion. This process is a pure powder metallurgy method, which has problems such as high raw material cost, complicated preparation process, and inability to achieve large-scale production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The composition and mass percentage of the material are: Si 12%, Cu 1.0%, Mg 0.2%, TiB 2 10% particles, 5% TiC particles, and the balance is Al.

[0018] The preparation process is as follows: after the aluminum ingot is melted, silicon, copper and magnesium are added, the melt is covered with argon to protect the melt, the temperature is raised to 1100 ° C, and the mass ratio of 3:1 AlTi 20 Powder and B 4 C particles, with 0.1% Ce 2 o 3 Mix well and dry at 150°C for 2 hours, inject into the melt with a rotary blowing device for aluminum alloy refining, the flow rate is 75ml / min, the stirring speed is 250rpm, and the stirring time is 15min. After the reaction, let it stand for 10 minutes, remove the scum and cast it. TiB 2 10%, TiC5% endogenous particle hybrid reinforced aluminum matrix composites, the mechanical properties of the composites treated with T6: σ b =358MPa, σ 0.2 =316MPa, δ=0.7%, E=88GPa.

Embodiment 2

[0020] The composition and mass percentage of the material are: Cu 5%,, TiB 2 5% particles, 2.5% TiC particles, and the balance is Al.

[0021] The preparation process is as follows: after the aluminum ingot is melted, copper is added, the melt is covered with argon to protect the melt, the temperature is raised to 900 ° C, and the mass ratio of 1:1 AlTi 20 Powder and B 4 C particles, with 0.2% Ce 2 o 3 Mix well and dry at 200°C for 1 hour, inject into the melt with a rotary blowing device for aluminum alloy refining, with a flow rate of 30ml / min, a stirring speed of 300rpm, and a stirring time of 10min. Stand still for 5 minutes after the reaction, remove the scum and cast. TiB 2 5%, TiC2.5% endogenous particle hybrid reinforced aluminum matrix composites, the mechanical properties of the composites treated with T6: σ b =445MPa, σ 0.2 =398MPa, δ=2.1%, E=80GPa.

Embodiment 3

[0023] The composition and mass percentage of the material are: Si 0.5%, Mg 1.0%, TiB 2 8% particles, 5% TiC particles, and the balance is Al.

[0024] The preparation process is as follows: after the aluminum ingot is melted, silicon and magnesium are added, the melt is covered with argon gas, and the temperature is raised to 1000°C, and the AlTi with a mass ratio of 2:1 20 Powder and B 4 C particles, with Ce 2 o 3 Mix well and dry at 200°C for 1 hour, inject into the melt with a rotary blowing device for aluminum alloy refining, with a flow rate of 50ml / min, a stirring speed of 300rpm, and a stirring time of 10min. Stand still for 5 minutes after the reaction, remove the scum and cast. TiB 2 8%, TiC5% endogenous particle hybrid reinforced aluminum matrix composites, the mechanical properties of the composites treated with T6: σ b =412MPa, σ 0.2 =373MPa, δ=2.1%, E=84GPa.

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Abstract

The invention provides an endogenous particle hybrid reinforced aluminum matrix composite and a preparation method thereof and belongs to the technical field of composites. The endogenous particle hybrid reinforced aluminum matrix composite is prepared from the following components in percentage by weight: 0-15% of Si, 0-8% of Cu, 0-5% of Mg, 0.1-15% of TiB2 particles, 0.1-10% of TiC particles and the balance of Al. The endogenous particle hybrid reinforced aluminum matrix composite comprises the following steps: (1) adding commercially pure aluminum to a crucible, melting an aluminum ingot and heating in the presence of argon; (2) evenly mixing AlTi20 powder and B4C particles as well as Ce2O3 together and drying; (3) injecting the mixture into the melt by use of an aluminum alloy refining rotary injection device, controlling the flow of the argon and performing mechanical stirring; (4) after the reaction is terminated, withdrawing from the rotary injection device and standing; (5) pouring into a die to obtain the endogenous particle hybrid reinforced aluminum matrix composite. The aluminum matrix composite prepared by use of the method is clean in interface, controllable in particle size and even in particle distribution, and meanwhile, the preparation method has the advantages of simple preparation process and suitability large-scale production.

Description

technical field [0001] The invention relates to a preparation method in the technical field of composite materials, in particular to an aluminum-based composite material reinforced by endogenous particles and a preparation method thereof. Background technique [0002] Aluminum matrix composites have high specific strength, specific stiffness and specific modulus, and are widely used in aerospace, aviation, automobile and electronic industries. The traditional method of preparing aluminum matrix composites is to add reinforcing particles to the aluminum alloy matrix, which has defects such as poor wettability between the added reinforcing particles and the matrix, difficulty in controlling the interface reaction, and uneven distribution of reinforcing particles, which affects the identity of the aluminum matrix composite. and stability. At the same time, the preparation process of using external particles is complicated and the cost is high, which limits popularization and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C32/00C22C1/02C22C1/06
Inventor 赵遵成李哲卢涛田晓光
Owner 赵遵成
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