Preparation method of situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry

A semi-solid slurry, al-si-cu technology, applied in the field of preparation of in-situ Al2O3 particle reinforced Al-Si-Cu composite semi-solid slurry, can solve the problem of poor bonding, poor wettability, and limited promotion and application and other problems, to achieve the effect of uniform semi-solid structure, no pollution of three wastes, and convenient operation.

Inactive Publication Date: 2012-07-18
江西迈肯科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are a series of problems such as poor wettability, poor bonding or interface brittleness between the traditional external particle reinforcement and the metal matrix, which limits the promotion and application of this type of material
The in-situ synthesis method has the advantages of good interfacial bonding, no pollution and good wettability, but it is greatly affected by metallurgical temperature and reaction time, and the obtained composite materials are not ideal

Method used

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  • Preparation method of situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry
  • Preparation method of situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry
  • Preparation method of situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Al powder and B 2 o 3 The powder is mixed according to the mass ratio of 1:1 and then ball milled to make prefabricated blocks and crushed into powder for later use. Put the Al-Si-Cu aluminum alloy ingot into the crucible and overheat to 800 0 C. After standing at this temperature for 20 minutes, use a bell jar to press into the mixed powder with a mass fraction of 1% wrapped in aluminum foil. After holding the heat for 10 minutes, place the ultrasonic horn probe under the melt surface, and apply Ultrasonic effect, the ultrasonic time is 10min, and the power is 200W. At the end of the ultrasonic effect, quickly cool down to 580 0 After C heat preservation treatment for 10 minutes, the semi-solid slurry of endogenous particle reinforced aluminum matrix composite material can be obtained, see figure 2 .

Embodiment 2

[0017] Al powder and B 2 o 3 The powder is mixed according to the mass ratio of 1:1 and then ball milled to make prefabricated blocks and crushed into powder for later use. Put the Al-Si-Cu aluminum ingot into the crucible and superheat to 800 0 C. After standing at this temperature for 20 minutes, use a bell jar to press into the mixed powder with a mass fraction of 3% wrapped in aluminum foil. After holding the heat for 10 minutes, place the ultrasonic horn probe under the melt surface, and apply Ultrasonic effect, the ultrasonic time is 20min, and the power is 300W. At the end of the ultrasonic effect, quickly cool down to 585 0 After 20 minutes of C heat preservation treatment, the semi-solid slurry of endogenous particle reinforced aluminum matrix composite material can be obtained, see image 3 .

[0018] From figure 1 , 2 , 3, it can be seen that the in-situ Al obtained by the present invention 2 o 3 The particle-reinforced Al-Si-Cu composite material has a uni...

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Abstract

The invention discloses a preparation method of situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry, which comprises the steps of: firstly, putting an Al-Si-Cu alloy ingot into a melting furnace, heating to 780-800 DEG C, and standing still for 20-30min at the temperature of 780-800 DEG C; drying mixed powder obtained by carrying out ball milling and crushing on Al powder and B2O3 powder which have the mass percent of 1.0-5.0%, and covering the dried mixed powder with aluminium foil; adding the mixed powder covered with the aluminium foil into melt, and carrying out heat preservation for 10min; then, stretching an ultrasonic amplitude transformer bar into alloy melt, and carrying out ultrasonic treatment for 10-20min, wherein the ultrasonic power is 150-300W; then, quickly cooling to 580-590 DEG C, and carrying out heat preservation for 10-20min; and finally, obtaining the situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry. The preparation method has the technical effects that the obtained situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry is well formed and rounding, fully meets the requirement of semi-solid formation, and is simple in technology, safe and reliable, convenient to operate and free from three-waste pollution.

Description

technical field [0001] The present invention relates to an in-situ Al 2 o 3 The invention discloses a method for preparing a particle-reinforced Al-Si-Cu composite material semi-solid slurry. Background technique [0002] Particle-reinforced aluminum matrix composites have many advantages such as high specific strength and high specific modulus, and are used in aviation, aerospace and automobile manufacturing and other fields. There are a series of problems between the traditional external particle reinforcement and the metal matrix, such as poor wettability, poor bonding, or interface brittleness, which limits the promotion and application of this type of material. The in situ synthesis method has the advantages of good interfacial bonding, no pollution and good wettability, but it is greatly affected by metallurgical temperature and reaction time, and the obtained composite materials are not ideal. With the development and maturity of semi-solid forming technology and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/10C22C21/02
Inventor 闫洪贺儒黄翔
Owner 江西迈肯科技有限公司
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