A method for preparing high-elastic modulus and high-strength aluminum alloys by mixing multi-phase ceramic particles

A technology of ceramic particles and aluminum alloy, applied in the field of aluminum alloy preparation, can solve the problems of chemical reaction pollution, poor wettability, etc., and achieve the effects of good chemical stability, improved strength and toughness, and improved stiffness and elastic modulus.

Inactive Publication Date: 2021-02-12
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the external addition method, the wettability between the ceramic particles and the matrix is ​​poor, and the interface between the particles and the matrix is ​​prone to chemical reactions and contamination.

Method used

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  • A method for preparing high-elastic modulus and high-strength aluminum alloys by mixing multi-phase ceramic particles
  • A method for preparing high-elastic modulus and high-strength aluminum alloys by mixing multi-phase ceramic particles
  • A method for preparing high-elastic modulus and high-strength aluminum alloys by mixing multi-phase ceramic particles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] In this embodiment, the method for preparing high-elastic modulus and high-strength aluminum alloy by mixing multi-phase ceramic particles is as follows:

[0118] (1)Al-Ti-B 4 The preparation of the C-BN system in-situ endogenous ceramic particle reinforcement is as follows:

[0119] (1a)Al-Ti-B 4 Preparation of C-BN system reaction compact:

[0120] Weigh a certain amount of Al powder with a particle size of about 13 μm, Ti powder with a particle size of about 13 μm, and B powder with a particle size of 0.5 μm. 4 C powder and BN powder with a particle size of 0.5 μm are used for later use; first press BN powder, B 4 The molar ratio of C powder is 1:1, and the weighed BN powder, B 4 C powder is put into the ball mill jar. The above-mentioned powder was activated by high-speed ball milling at a speed of 200 r / min for 1.5 h with a planetary ball mill.

[0121] (1b) is expected in Al-Ti-B 4 C-BN system generates TiCN, TiB 2 , The total content of AlN particles is 2...

Embodiment 2

[0149] The method for preparing high-elastic modulus and high-strength aluminum alloys by mixing multi-phase ceramic particles in this embodiment is as follows:

[0150] (1)Al-Ti-B 4 The preparation of the C-BN system in-situ endogenous ceramic particle reinforcement is as follows:

[0151] (1a)Al-Ti-B 4 Preparation of C-BN system reaction compact:

[0152] Weigh a certain amount of Al powder with a particle size of about 48 μm, Ti powder with a particle size of about 45 μm, and B powder with a particle size of 6.5 μm. 4 C powder and BN powder with a particle size of 1.3 μm are used for standby; first press BN powder, B 4 The molar ratio of C powder is 1:1, and the weighed BN powder, B 4 C powder is put into the ball mill jar. The above powder was activated by high-speed ball milling at a speed of 260 r / min for 2 h with a planetary ball mill.

[0153] (1b) is expected in Al-Ti-B 4 C-BN system generates TiCN, TiB 2 , The total content of AlN particles is 30wt.%, accordi...

Embodiment 3

[0181] The method for preparing high-elastic modulus and high-strength aluminum alloys by mixing multi-phase ceramic particles in this embodiment is as follows:

[0182] (1)Al-Ti-B 4 The preparation of the C-BN system in-situ endogenous ceramic particle reinforcement is as follows:

[0183] (1a)Al-Ti-B 4 Preparation of C-BN system reaction compact:

[0184] Weigh a certain amount of Al powder with a particle size of about 25 μm, Ti powder with a particle size of about 25 μm, and B powder with a particle size of 3 μm. 4 C powder and BN powder with a particle size of 1 μm are used for later use; firstly, the weighed BN powder, B 4 C powder is put into the ball mill jar. The above-mentioned powder was activated by high-speed ball milling at a speed of 300 r / min for 3 h with a planetary ball mill.

[0185] (1b) is expected in Al-Ti-B 4 C-BN system generates TiCN, TiB 2 , The total content of AlN particles is 40wt.%, according to Ti powder, B 4 C powder, BN powder molar ratio...

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Abstract

The invention relates to a method for preparing a high-elastic-modulus high-strength aluminum alloy by mixing multiphase ceramic particles, which specifically comprises the following steps: (1) Al-Ti-B 4 Preparation of in-situ endogenous ceramic particle reinforcement in C‑BN system; (2) pretreatment of SiC ceramic particles; (3) composite strengthening of Al‑Si‑Mg alloy with various particles; (4) strengthened Al‑Si‑Mg alloy Casting and heat treatment of Mg alloy. In the method of the invention, the directly added micron-sized SiC ceramic particles can significantly increase the rigidity and elastic modulus of the aluminum alloy. Multi-phase mixed ceramic particles can work synergistically through different methods such as grain refinement strengthening, Orowan strengthening, and precipitated phase strengthening to further strengthen the aluminum alloy, and the dispersion effect of ceramic particles is better. The strengthening process is simple and convenient, and the operability Strong, suitable for industrial batch production, with great practical value and potential.

Description

technical field [0001] The invention relates to a method for preparing aluminum alloy with high elastic modulus and high strength by mixing multiphase ceramic particles, and belongs to the technical field of aluminum alloy preparation. Background technique [0002] With the tremendous development of automobiles, military and civilian aviation and electronics, ceramic particles with low cost, light weight, high plasticity, high thermal conductivity and good dimensional stability have received more and more attention as strengthening agents for aluminum alloys. Al-Si-Mg alloy, as a heat-treatable strengthening alloy, has natural aging ability, excellent casting performance, good fluidity, high air tightness and good corrosion resistance. However, as an aluminum alloy, compared with steel, its elastic modulus and stiffness are still lower, and it still cannot be used well under certain high-load conditions. However, as an aluminum alloy material, it still has certain advantage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/06C22C21/02C22C32/00C22F1/043
CPCC22C1/06C22C1/1015C22C1/1036C22C21/02C22C32/0047C22F1/043C22C1/1052
Inventor 邱丰佟昊天杨宏宇舒世立
Owner JILIN UNIV
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