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Prepn process of in-situ grain reinforced refractory aluminium-base composite material

An aluminum-based composite material and particle-enhancing technology, which is applied to the preparation field in the field of material technology, can solve the problems of unstable particles, high raw material cost, low high temperature strength, etc., and achieves the effects of wide application prospect, simple preparation process and low cost.

Inactive Publication Date: 2006-03-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method first prepares the reaction element compact, and then adds the reaction element to the matrix alloy melt, so that the material preparation method has high raw material costs and poor dispersion of the compact; and the high temperature strength of the material is not high, and the particles are in the alloy matrix. Medium unstable, prone to interfacial reactions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The weight percentage of the preparation components is 11%Si, 0.5%Mg, 0.8%Cu, 0.8%Ni, 1%TiB 2 , and the rest are in-situ particle-reinforced high-temperature-resistant aluminum matrix composites of Al.

[0016] The preparation process is as follows:

[0017] Put the ZL102 alloy ingot and industrial pure aluminum into the crucible, heat up to 680°C after melting, add a covering agent to cover the melt, remove the covering agent, and dry the KFB with a mass ratio of 1:1.5 4 、KTiF 6 Mix evenly and add to the melt, stir, stirring speed 500rpm, stirring time 30min, take out the by-products, add Mg, Al-Ni and Al-Cu, stand in vacuum, stand temperature 680°C, stand time 30min, remove slag , Assemble the middle partition, liquid riser, mold, and the temperature of the metal mold is 25°C. The low-pressure equipment with controllable process parameters is used for low-pressure forming. The specific process parameters of low-pressure forming are as follows: the filling temperatur...

Embodiment 2

[0022] The weight percentage of the preparation components is 13%Si, 1.5%Mg, 1.3%Cu, 1.5%Ni, 20%TiB 2 , and the rest are in-situ particle-reinforced high-temperature-resistant aluminum matrix composites of Al.

[0023] The preparation process is as follows:

[0024] Put the ZL102 alloy ingot and the Al-Si master alloy together into the crucible, heat up to 800°C after melting, add a covering agent to cover the melt, remove the covering agent, and dry the KFB with a mass ratio of 1:1.5 4 、KTiF 6 Mix evenly and add to the melt, stir, stirring speed 200rpm, stirring time 10min, take out the by-products, add Mg, Al-Ni and Al-Cu, stand in vacuum, stand at 760°C, stand for 10min, remove slag , Assemble the middle partition, liquid riser, mold, metal mold temperature 400 ℃, adopt low-pressure equipment with controllable process parameters for low-pressure forming, the specific process parameters of low-pressure forming are as follows: the filling temperature of the composite materi...

Embodiment 3

[0029] The weight percentage of the preparation components is 12% Si, 1.0% Mg, 1.0% Cu, 1.0% Ni, 10% TiB 2 , and the rest are in-situ particle-reinforced high-temperature-resistant aluminum matrix composites of Al.

[0030] The preparation process is as follows:

[0031] Put the ZL102 alloy ingot and the Al-Si master alloy together into the crucible, heat up to 740°C after melting, add a covering agent to cover the melt, remove the covering agent, and dry the KFB with a mass ratio of 1:1.5 4 、KTiF 6 Mix evenly and add to the melt, stir, stirring speed 400rpm, stirring time 20min, take out the by-products, add Mg, Al-Ni and Al-Cu, stand in vacuum, stand at 740°C for 20min, remove slag , assemble the middle partition, liquid riser, mold, metal mold temperature 200 ℃, adopt low-pressure equipment with controllable process parameters for low-pressure forming, and the specific process parameters for low-pressure forming are as follows: the filling temperature of the composite mat...

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Abstract

The in-situ grain reinforced refractory aluminum-base composite material consists of Si 11-13 wt%, Mg 0.5-1.5 wt%, Cu 0.8-1.3 wt%, Ni 0.5-1.5 wt%, and TiB2 1-20 wt% except Al. The preparation process includes the following steps: 1. adding ZL102 alloy and Al-Si intermediate alloy or industrial pure aluminum into crucible, melting, heating and covering with covering agent; 2. mixing KFB4 and KTiF6, stoving and adding into the melt via stirring; 3. taking out the side product after reaction, adding industrial pure Mg, Al-Ni intermediate alloy and Al-Cu intermediate alloy, scumming, pumping vacuum and letting stand; and 4. low pressure casting formation. The composite material of the present invention has reinforcing TiB2 grains with clean interface and even distribution, excellent structure and performance, excellent high temperature strength, high plasticity and high modulus, and the present invention is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method in the technical field of materials, in particular to a preparation method of an in-situ particle reinforced high temperature resistant aluminum-based composite material. Background technique [0002] Aluminum matrix composites have the advantages of high specific strength and specific modulus, low thermal expansion coefficient, etc., and are widely used in aerospace, aviation, national defense and electronic industries. Aluminum-based composites prepared with additional particles have defects such as poor wettability between reinforcing particles and the matrix, difficult control of interface reactions, and uneven distribution of reinforcing particles, which affect the performance of aluminum-based composites; at the same time, the preparation process of using additional particles is complex and costly. High, not conducive to popularization and application. The interface of the aluminum matrix composite p...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C21/02
Inventor 易宏展王浩伟马乃恒张亦杰陈东
Owner SHANGHAI JIAO TONG UNIV
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