Preparation method of endogenous double-phase particle enhanced aluminum-based composite material

A technology for particle-reinforced aluminum and composite materials, applied in the field of metal matrix composite materials, can solve the problems of difficulty in the reaction between the reinforcement particles and the interface, poor compatibility between the reinforcement particles and the matrix, and restrictions on industrial promotion.

Inactive Publication Date: 2017-04-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The external particle method mainly includes powder metallurgy, stirring casting, squeeze casting, etc. These methods have problems such as poor compatibility between the reinforcing particles and the matrix, and difficult control of the reaction between the reinforcing particles and the interface, which limits their industrial promotion.

Method used

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  • Preparation method of endogenous double-phase particle enhanced aluminum-based composite material
  • Preparation method of endogenous double-phase particle enhanced aluminum-based composite material
  • Preparation method of endogenous double-phase particle enhanced aluminum-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Preparation of mixed powder: weigh 30g of TiO with a particle size of 100-150 mesh 2 Powder and 94.59g KBF with a particle size of 100-150 mesh 4 Powder (the molar ratio of Ti and B is 1:2, the mixed powder accounts for 4.91% of the weight of aluminum alloy, regardless of loss), mixed in a mixer for 2 hours, and then dried at 200 ° C for 1 hour, A mixed powder is obtained.

[0061] (2) Mixed powder compact: the mixed powder obtained in step (1) is pressed with a press under a pressure of 100 MPa to obtain a mixed powder compact.

[0062] (3) Melting and heat preservation of aluminum alloy: Weigh 2537g of ZL101 aluminum alloy, and then heat the weighed aluminum alloy to 850°C to melt and heat it for 10 minutes.

[0063] (4)TiB 2 and Al 2 o 3 In-situ formation of dual-phase ceramic particles: Add the mixed powder blank obtained in step (2) to the aluminum alloy melt obtained in step (3) to react with the internal particles. Stir for 60 minutes until the endogeno...

Embodiment 2

[0067] (1) Preparation of mixed powder: weigh 90g of TiO with a particle size of 160-230 mesh 2 Powder and 283.7g KBF with a particle size of 160-230 mesh 4 Powder (the molar ratio of Ti to B is 1:2, the mixed powder accounts for 9.89% of the weight of the aluminum alloy weighed), mixed in a mixer for 2.5 hours, and then dried at a temperature of 240°C for 2 hours to obtain a mixed powder.

[0068] (2) Mixed powder compact: the mixed powder obtained in step (1) is pressed with a press under a pressure of 250 MPa to obtain a mixed powder compact.

[0069] (3) Melting and heat preservation of aluminum alloy: Weigh 3778.6g of ZL201 aluminum alloy, and then heat the weighed aluminum alloy to 880°C to melt and heat it for 30 minutes.

[0070] (4)TiB 2 and Al 2 o 3 In-situ formation of dual-phase ceramic particles: Add the mixed powder blank obtained in step (2) to the aluminum alloy melt obtained in step (3) to react with the inner particles. Stir for 70 minutes until the endo...

Embodiment 3

[0074] (1) Preparation of mixed powder: weigh 200g of TiO with a particle size of 230-300 mesh2 Powder and 630.6g particle size 230~300 mesh KBF 4 Powder (the molar ratio of Ti and B is 1:2, the mixed powder accounts for 35.9% of the weight of the aluminum alloy weighed), mixed in a mixer for 3 hours, and then dried at a temperature of 270°C for 3 hours to obtain a mixed powder.

[0075] (2) Mixed powder compact: the mixed powder obtained in step (1) is pressed with a press under a pressure of 350 MPa to obtain a mixed powder compact.

[0076] (3) Melting and heat preservation of aluminum alloy: Weigh 2432.6g of ZL111 aluminum alloy, and then heat the weighed aluminum alloy to 900°C to melt and hold it for 40 minutes.

[0077] (4)TiB 2 and Al 2 o 3 In-situ formation of dual-phase ceramic particles: Add the mixed powder blank obtained in step (2) to the aluminum alloy melt obtained in step (3) to react with the inner particles. Stir for 80 minutes until the endogenous react...

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Abstract

The invention relates to a preparation method of an endogenous double-phase particle enhanced aluminum-based composite material and belongs to the field of aluminum composite materials. The preparation method comprises the steps: by taking TiO2 powder and KBF4 powder as raw materials, uniformly mixing, drying and pressing the raw materials to obtain a mixed powder blank; adding the mixed powder blank into an aluminum alloy smelt and stirring the mixture; after an endogenous reaction, eliminating reaction dross; adding a refining agent C2Cl6(0.2-0. 7wt.%) to degas and refine; and leaving a compound melt to stand and pouring the same into a casting mould to obtain the endogenous TiB2 and Al2O3 double-phase particle enhanced aluminum-based composite material. According to the aluminum-based composite material provided by the invention, the endogenous TiB2 and Al2O3 particles are fine and uniform, clean in surface and good in combination with a matrix, and the endogenous double-phase particle enhanced aluminum-based composite material has the characteristics of light weight, high strength, high elastic modulus and the like.

Description

technical field [0001] The invention relates to a method for preparing an aluminum-based composite material reinforced with endogenous dual-phase particles, and belongs to the technical field of metal-based composite materials. Background technique [0002] Aluminum alloy has the advantages of low density, high specific strength, high specific modulus, etc. It is widely used in aerospace, construction, automobile, machinery manufacturing, chemical industry and other fields, and is one of the most widely used non-ferrous metal materials in industry. However, aluminum alloys have disadvantages such as low strength and hardness, poor wear resistance, limited elastic modulus, and high-temperature performance to be improved, which limits its industrial application range. Adding ceramic particles into the aluminum matrix to form a particle-reinforced aluminum matrix composite material can significantly improve its properties such as hardness, wear resistance and elastic modulus. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C32/00C22C21/00
CPCC22C1/1036C22C21/00C22C32/0005
Inventor 左孝青冉松江罗晓旭周芸陈显宁
Owner KUNMING UNIV OF SCI & TECH
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