Double-scale ceramic particle hybrid high-elastic modulus high-strength aluminum alloy and preparing method thereof

A technology of ceramic particles and aluminum alloy, which is applied in the field of high-performance aluminum alloy processing and its preparation, can solve the problems of damage to the plasticity of materials, and achieve the effects of cost saving, good interface bonding and important economic benefits

Active Publication Date: 2019-04-12
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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  • Double-scale ceramic particle hybrid high-elastic modulus high-strength aluminum alloy and preparing method thereof
  • Double-scale ceramic particle hybrid high-elastic modulus high-strength aluminum alloy and preparing method thereof
  • Double-scale ceramic particle hybrid high-elastic modulus high-strength aluminum alloy and preparing method thereof

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preparation example Construction

[0042] The present invention also provides a method for preparing a high-elastic-modulus high-strength aluminum alloy mixed with dual-scale ceramic particles, comprising the following steps:

[0043] Step 1. Pretreatment of Micron SiC Ceramic Particles

[0044] (1) SiC surface oxidation treatment

[0045] 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 calcining, using a segmented oxidation method High temperature oxidation treatment of SiC;

[0046] The specific staged oxidation process is as follows:

[0047] Heat up to 573K at a rate of 20-100K / min, hold for 10 minutes, continue to heat up to 973K at a rate of 20-100K / min, hold for 10 minutes, then heat to a predetermined temperature of 973-1373K, and hold for 1-12 hours.

[0048] (2) Ball milling pre-dispersion treatment

[0049] i. ge...

Embodiment 1

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

[0081] Step 1, pretreatment of micron SiC ceramic particles

[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 0.5 mm, and then put the corundum crucible into a high-temperature box-type resistance furnace for calcining, and adopt a segmented oxidation method to SiCp Carry out high-temperature oxidation treatment, and the specific staged oxidation process is as follows: heat up to 573K at a rate of 30K / min, hold at 573K for 10 minutes, continue to heat up to 973K at a rate of 50K / min, hold for 10 minutes, then heat to a predetermined temperature of 1373K, and hold for 2 hours.

[0084] (2) Ball milling pre-dispersion treatment:

[0085] i. Take SiC powder with a particle size of 10 μm and Al-Si-Mg (Si: 7wt.%, Mg: 0.7wt.%, the balance is aluminum) alloy powder w...

Embodiment 2

[0116] Step 1, the pretreatment of micron SiC ceramic particles is as follows:

[0117] (1) SiC surface oxidation treatment:

[0118] 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 0.8 mm, and then put the corundum crucible into a high-temperature box-type resistance furnace for calcining, and adopt a segmented oxidation method to SiC Carry out high-temperature oxidation treatment, the specific staged oxidation process is as follows: heat up to 573K at a rate of 50K / min, hold at 573K for 10 minutes, continue to heat up to 973K at a rate of 60K / min, hold for 10 minutes, then heat to a predetermined temperature of 1273K, and hold for 5 hours.

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

[0120] i. Take SiC powder with a particle size of 6 μm and Al-Si-Mg (Si: 9wt.%, Mg: 0.5wt.%, the balance is aluminum) alloy powder with a particle size of 15 μm, according to SiC and Al-Si-Mg alloy ...

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Abstract

The invention discloses a double-scale ceramic particle hybrid high-elastic modulus high-strength aluminum alloy. The double-scale ceramic particle hybrid high-elastic modulus high-strength aluminum alloy is characterized in that the double-scale ceramic particle hybrid high-elastic modulus high-strength aluminum alloy comprises chemical compositions including, by mass, 6.5%-10% of Si, 0.3%-0.7% of Mg, 0.1%-0.5% of TiB2, 2%-8% of SiC and the balance Al. The invention also provides a preparing method of the double-scale ceramic particle hybrid high-elastic modulus high-strength aluminum alloy.Al powder, Ti powder and B powder are sintered for in-situ endogeny of nano-scale TiB2 particles, micron-SiC ceramic particles are externally added to prepare the high-elastic modulus high-strength aluminum alloy, the contents of the nano-TiB2 and micron-SiC ceramic particles are optimized, the superposition effect of nano-sized ceramic particles and micron-sized ceramic particles in an aluminum matrix is realized, 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 dual-scale ceramic particle mixed high-elastic-modulus high-strength aluminum alloy 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 properties. Usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C32/00C22C1/10C22C1/03
CPCC22C1/1015C22C1/1036C22C21/02C22C32/0063C22C1/1021
Inventor 邱丰佟昊天姜启川杨宏宇
Owner JILIN UNIV
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