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Multi-scale ceramic particle mixed high elastic modulus high strength aluminum alloy and preparation method thereof

A technology of ceramic particles and high elasticity, which is applied in the field of multi-scale ceramic particles mixed with high elastic modulus and high strength aluminum alloy and its preparation, can solve the problems of damaging the plasticity of materials, and achieve the effects of cost saving, uniform dispersion and simple operation

Active Publication Date: 2019-04-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the means of strengthening alloys include heat treatment strengthening or particle strengthening agents, but the strengthening agents commonly used to strengthen aluminum alloys tend to damage the plasticity of materials while increasing the strength. Strengthening agent for alloy strong shaping becomes the key at present

Method used

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  • Multi-scale ceramic particle mixed high elastic modulus high strength aluminum alloy and preparation method thereof
  • Multi-scale ceramic particle mixed high elastic modulus high strength aluminum alloy and preparation method thereof
  • Multi-scale ceramic particle mixed high elastic modulus high strength aluminum alloy and preparation method thereof

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preparation example Construction

[0044] The present invention also provides a method for preparing multi-scale ceramic particles mixed with high elastic modulus and high strength aluminum alloy, comprising the following steps:

[0045] Step 1. Pretreatment of SiC ceramic particles

[0046] (1) SiC surface oxidation treatment:

[0047] i. Spread the SiC powder on a high-purity corundum crucible with a diameter of 100mm and a height of 20mm, with a thickness of about 0.3-0.8mm, and then put the corundum crucible into a high-temperature box-type resistance furnace for sintering.

[0048] SiC is subjected to high-temperature oxidation treatment by a staged oxidation method. The specific staged oxidation process is as follows: heat up to 573K at a rate of 20-100K / min, keep warm for 10-20min, continue to heat up to 973K at a rate of 20-100K / min, and hold for 5 minutes. -10min, then heat to the predetermined temperature 973K-1373K, keep warm for 1-12h.

[0049] (2) Ball milling pre-dispersion treatment:

[0050] ...

Embodiment 1

[0080] The preparation method of this example comprises the following steps:

[0081] Step 1, the pretreatment of SiC ceramic particle, specifically as follows:

[0082] (1) SiC surface oxidation treatment:

[0083] i. Spread the SiC powder on a high-purity corundum crucible with a diameter of 100 mm and a height of 20 mm, with a thickness of about 0.3 mm, and then put the corundum crucible into a high-temperature box-type resistance furnace for sintering.

[0084] The high temperature oxidation treatment of SiC is carried out by the staged oxidation method. The specific staged oxidation process is as follows: the temperature is raised to 573K at a rate of 20K / min, and the temperature is kept at 573K for 20 minutes, and the temperature is continued to be raised to 973K at a rate of 30K / min. Predetermined temperature 973K, heat preservation 12h.

[0085] (2) Ball milling pre-dispersion treatment:

[0086] i. Take SiC powder with a particle size of 6 μm and Al-Si-Mg (Si: 7%, ...

Embodiment 2

[0115] Step 1, the pretreatment of micron SiC ceramic particles is as follows:

[0116] (1) SiC surface oxidation treatment:

[0117] i. Spread the SiC powder on a high-purity corundum crucible with a diameter of 100 mm and a height of 20 mm, with a thickness of about 0.6 mm, and then put the corundum crucible into a high-temperature box-type resistance furnace for sintering.

[0118] SiC is subjected to high-temperature oxidation treatment by means of staged oxidation. The specific staged oxidation process is as follows: the temperature is raised to 573K at a rate of 50K / min, and the temperature is kept at 573K for 15 minutes. Predetermined temperature 1373K, keep warm for 2h.

[0119] (2) Ball milling pre-dispersion treatment:

[0120] i. Take SiC powder with a particle size of 10 μm and Al-Si-Mg (Si: 8%, Mg: 0.5wt.%, the balance is aluminum) alloy powder with a particle size of 15 μm, according to SiC and Al-Si-Mg alloy powder The mass ratio is 1:3, and it is prepared in...

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Abstract

The invention discloses a multi-scale ceramic particle mixed high elastic modulus high strength aluminum alloy. The chemical composition and weight percentage of the multi-scale ceramic particle mixedhigh elastic modulus high strength aluminum alloy are as follows: 6.5-10% of Si, 0.3-0.7% of Mg, 2-8% of SiC, 0.1-0.6% of TiCN, AlN and TiB2 and the balance Al. The invention further provides a preparation method of the multi-scale ceramic particle mixed high elastic modulus high strength aluminum alloy, Al powder, Ti powder and BN and B4C powder are subjected to sintering and situ endogenous preparation to generate nano-sized TiCN particles and sub-micron-sized TiB2 and AlN particles, micron SiC ceramic particles are added additionally, and the high elastic modulus high strength aluminum alloy is prepared. The content of TiCN, AlN and TiB2 particles and SiC particles is optimized, the superposition effect of nano-sized ceramic particles and micron-sized ceramic particles in aluminum matrix is achieved, and the mechanical properties of the aluminum alloy are improved.

Description

technical field [0001] The invention relates to the field of high-performance aluminum alloy processing and its preparation. More specifically, the invention relates to a high-elastic-modulus, high-strength aluminum alloy mixed with multi-scale ceramic particles and a preparation method thereof. Background technique [0002] Hypoeutectic Al-Si-Mg alloy is a kind of heat treatable strengthening alloy, which has natural aging ability, high strength and good plasticity. In addition, the alloy has excellent casting performance, good fluidity, small linear shrinkage, low hot cracking tendency, high air tightness and good corrosion resistance. However, with the continuous development of automobiles, rail transit, aerospace, and military fields in recent years, the requirements for the required material properties are also getting higher and higher. In addition to the requirements for light weight of materials, alloy materials are also required to maintain high mechanical properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C32/00C22C21/02C22C21/00C22C1/06C22F1/04C22F1/043
CPCC22C1/06C22C1/1015C22C1/1036C22C21/00C22C21/02C22C32/0047C22F1/04C22F1/043C22C1/1052
Inventor 邱丰佟昊天杨宏宇舒世立
Owner JILIN UNIV
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