Method for preparing smelting cast-in-site synthetic alpha-Al2O3 granule reinforced copper base composite material

A copper-based composite material and particle-reinforced technology, which is applied in the field of melting and casting-in-situ synthesis of α-Al2O3 particle-reinforced copper-based composite materials, can solve problems such as poor wettability, difficulty in controlling the number of reinforcements, and deterioration of material properties. , to achieve the effect of reducing preparation cost, high utilization rate and improving comprehensive performance

Inactive Publication Date: 2006-06-07
UNIV OF SCI & TECH BEIJING
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

However, the common problem with these methods is that the reaction generates the desired reinforcing phase and at the same time brings unnecessary by-products, which tend to segregate and distribute on the grain boundaries during solidification, deteriorating the properties of the material.
[0009] Although the process of directly adding powder into the metal melt is simple, the disadvantage is that the number of reinforcements is difficult to control, especially when the wettability between the powder and the metal melt is poor.

Method used

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  • Method for preparing smelting cast-in-site synthetic alpha-Al2O3 granule reinforced copper base composite material
  • Method for preparing smelting cast-in-site synthetic alpha-Al2O3 granule reinforced copper base composite material

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Effect test

Embodiment 1

[0023] Preparation of 3 wt% Al 2 o 3 / copper composite. According to the ratio of Al:CuO=9:35 (weight%), Al powder and CuO powder with purity of 96% and 98% and particle size of 75 μm were weighed and mixed uniformly. A cylindrical prefabricated block of Φ20×30 mm is pressed on a press, and the pressing pressure is 26 MPa. Put 2kg of pure copper into a medium frequency induction furnace to melt and heat to 1160°C. Press a 0.16 kg prefabricated block into the copper liquid with a graphite bell jar and keep it warm for 15 minutes. When the melt temperature is 1150°C, it is poured into the metal mold to obtain about 3 wt% Al 2 o 3 / copper composite.

Embodiment 2

[0025] Preparation of 6 wt% Al 2 o 3 / copper composite. According to the ratio of Al:CuO=9:39 (weight%), Al powder and CuO powder with a purity of 96% and 98% and a particle size of 75 μm were weighed and mixed uniformly. A cylindrical prefabricated block of Φ20×30 mm is pressed on a press, and the pressing pressure is 33 MPa. Put 2kg of pure copper into a medium frequency induction furnace to melt and heat to 1170°C. Press a 0.32 kg prefabricated block into the copper liquid with a graphite bell jar and keep it warm for 20 minutes. When the melt temperature is 1160°C, it is poured into the metal mold to obtain about 6 wt% Al 2 o 3 / copper composite.

Embodiment 3

[0027] Preparation of 9 wt% Al 2 o 3 / copper composite. According to the ratio of Al:CuO=9:37 (weight%), Al powder and CuO powder with a purity of 96% and 98% and a particle size of 75 μm were weighed and mixed uniformly. A cylindrical prefabricated block of Φ20×30 mm is pressed on a press, and the pressing pressure is 37 MPa. Put 2kg of pure copper into a medium frequency induction furnace to melt and heat to 1200°C. Press a 0.48 kg prefabricated block into the copper liquid with a graphite bell jar and keep it warm for 25 minutes. When the melt temperature is 1170°C, it is poured into the sand mold to obtain about 9 wt% Al 2 o 3 / copper composite.

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Abstract

The present invention relates to fusion casting-in-site synthesis process of preparing alpha-Al2O3 grain reinforced copper base composite material, and belongs to the field of metal base composite material. The technological process includes: compounding materials based on reaction formula 2Al+3CuO-->3Cu+Al2O3; mixing materials Al and CuO in a material mixing machine and forming; heating matrix material Cu of over 99.0 % purity in MF inducing furnace to the temperature of 50-150 deg.c over the smelting point of Cu; pressing the fabricated blocks on 1-10 wt% of the melt into the melt and maintaining; casting to obtain in-site reacted alpha-Al2O3 grain reinforced copper base composite material. The advantages include shortened technological process, low manufacture cost and wide application as high strength and high conductivity electronic and electric material.

Description

technical field [0001] The invention belongs to the field of metal matrix composite materials, and in particular provides a melting and casting-in-situ synthesis of α-Al 2 o 3 The preparation method of particle-reinforced copper-based composite material can synchronize the smelting of the matrix alloy and the generation of the reinforcing phase, significantly shorten the composite material preparation process, and reduce the manufacturing cost of the copper-based composite material, and can be widely used in industries requiring high strength and high conductivity. fields of electronics and electrotechnical technology. Background technique [0002] Since the mid-1980s, driven by application and market demand, the research focus of metal matrix composites has shifted from continuous fiber-reinforced metal matrix composites to discontinuous fiber reinforcement with lower cost but broad industrial application prospects. metal matrix composites. In recent years, in situ react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10B22D23/04
Inventor 崔华杨滨张济山孙淼黄赞军
Owner UNIV OF SCI & TECH BEIJING
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