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In-situ multiphase mixed-scale ceramic reinforced Al-Zn-Mg-Cu aluminium alloy in melt and preparation method thereof

An aluminum alloy and scale technology, applied in the field of aluminum alloy and nano-particle reinforced aluminum alloy, can solve the problems of cumbersome heat treatment process, limited improvement, unstable process, etc., and achieves simple and convenient strengthening process, improved strength and toughness, and good dispersion effect. Effect

Inactive Publication Date: 2019-04-05
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods for improving the strength of Al-Zn-Mg-Cu aluminum alloys are still through heat treatment methods such as microalloying, composition adjustment, homogenization, solid solution, and aging. Although these traditional treatment methods can slightly improve The mechanical properties of Al-Zn-Mg-Cu series aluminum alloys, but the degree of improvement is limited, especially the tedious heat treatment process, which will inevitably bring about process instability and increase costs.

Method used

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  • In-situ multiphase mixed-scale ceramic reinforced Al-Zn-Mg-Cu aluminium alloy in melt and preparation method thereof
  • In-situ multiphase mixed-scale ceramic reinforced Al-Zn-Mg-Cu aluminium alloy in melt and preparation method thereof

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preparation example Construction

[0046] The present invention also provides a method for preparing Al-Zn-Mg-Cu aluminum alloy strengthened by in-situ multi-phase hybrid scale ceramics in a melt, which specifically includes the following steps:

[0047] (1) The pretreatment of the reaction compact is as follows:

[0048] (1a) Take a certain amount of aluminum powder and titanium powder, wherein the particle size of the aluminum powder is 13-48 μm, and the purity is ≥99.9wt.%; the particle size of the titanium powder is 13-45 μm, and the purity is ≥99.9wt.%; press B 4 The molar ratio of C and BN is 1:1, respectively weigh a certain amount of B with a particle size of 0.5-6.5 μm and a purity of ≥92.0wt.%. 4 C powder and BN powder with a particle size of 0.5-1.3 μm and a purity of ≥99.0wt.%;

[0049] (1b) Put the BN powder into a ball mill tank, and use a planetary ball mill to activate the ball mill at a speed of 200-300r / min for 150min-200min;

[0050] Among them, several zirconia grinding balls are pre-insta...

Embodiment 1

[0079] (1) The pretreatment of the reaction compact is as follows:

[0080] (1a) Weigh a certain amount of aluminum powder and titanium powder, wherein the particle size of aluminum powder is 13 μm, purity ≥ 99.9wt.%; the particle size of titanium powder is 23 μm, purity ≥ 99.9wt.%; press B 4 The molar ratio of C and BN is 1:1, respectively weigh a certain amount of B with a particle size of 6.5 μm and a purity of ≥92.0wt.%. 4 C powder and BN powder with a particle size of 1.3 μm and a purity ≥ 99.0 wt.%;

[0081] (1b) Put the BN powder into a ball mill tank, and use a planetary ball mill to perform high-speed ball mill activation treatment at a speed of 300r / min for 150min.

[0082] (1c) Add B to the activated BN powder 4 C powder, continue to process 120min at a high-speed ball mill at a speed of 100r / min; obtain uniformly mixed BN and B 4 C powder.

[0083] (1d) make reactant titanium powder, B 4 The molar ratio Ti:B of C powder and BN powder 4 C:BN=9:2.4:2.4, prepare A...

Embodiment 2

[0108] (1) The pretreatment of the reaction compact is as follows:

[0109] (1a) Take a certain amount of aluminum powder and titanium powder, wherein the particle size of the aluminum powder is 25 μm, and the purity is ≥99.9wt.%; the particle size of the titanium powder is 13 μm, and the purity is ≥99.9wt.%; press B 4 The molar ratio of C and BN is 1:1, respectively weigh a certain amount of B with a particle size of 0.5 μm and a purity of ≥92.0wt.%. 4 C powder and BN powder with a particle size of 1.3 μm and a purity ≥ 99.0 wt.%;

[0110] (1b) Put the BN powder into a ball mill tank, and use a planetary ball mill to perform high-speed ball mill activation treatment at a speed of 250r / min for 180min.

[0111] (1c) Add B to the activated BN powder 4 C powder, continue to process 60min with high-speed ball milling at a speed of 300r / min; obtain uniformly mixed BN and B 4 C powder.

[0112] (1d) make reactant titanium powder, B 4 The molar ratio of C powder and BN powder is...

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Abstract

The invention discloses an in-situ multiphase mixed-scale ceramic reinforced Al-Zn-Mg-Cu aluminium alloy in melt and a preparation method thereof. the in-situ multiphase mixed-scale ceramic reinforcedAl-Zn-Mg-Cu aluminium alloy in melt consists of the following chemical components in percentage by mass: 5.1wt%-6.1wt% of Zn, 2.1wt%-2.9wt% of Mg, 1.2wt%-2.0wt% of Cu, 0wt%-0.40wt% of Si, 0wt%-0.50wt% of Fe, 0wt%-0.30wt% of Mn, 0wt%-0.20wt% of Ti, 0.18wt%-0.28wt% of Cr, 0.05wt%-0.4wt% of TiCN, TiB2 and AlN, and the balance of Al. The invention further discloses a preparation method for the in-situ multiphase mixed-scale ceramic reinforced Al-Zn-Mg-Cu aluminium alloy in melt. In the alloy melt, multi-phase micro-nano mixed-dimension TiCN, TiB2 and AlN ceramic particles are uniformly dispersedthrough in-situ self-propagating combustion reaction, content of the TiCN, TiB2 and AlN ceramic particles is optimized, and toughness of the aluminium alloy is improved.

Description

technical field [0001] The invention relates to the field of aluminum alloys and nanoparticle-strengthened aluminum alloys. More specifically, the invention relates to a method for strengthening Al-Zn-Mg-Cu aluminum alloys with in-situ multiphase hybrid scale ceramics in a melt. Background technique [0002] In the fields of new energy, automobile, aviation, aerospace and communication, the constant pursuit of lightweight, high performance, long life and high efficiency of materials, most of them are the demand for new high-performance aluminum alloys. Al-Zn-Mg-Cu aluminum alloy has high specific strength and specific stiffness, and is easy to process. It is an important engineering material in the fields of aerospace and transportation. However, the current Al-Zn-Mg-Cu aluminum alloy has yet to be improved due to its high temperature strength, which limits its further application. Therefore, this has triggered the research on lightweight, high-strength and toughness partic...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C21/10C22F1/053
CPCC22C1/1036C22C21/10C22F1/002C22F1/053C22C1/1052
Inventor 邱丰赵建融舒世立杨宏宇
Owner JILIN UNIV
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