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Preparation method of long-dimension dispersion-strengthened copper-based composite material and its melting and casting device

A technology of copper-based composite materials and dispersion-strengthened copper, which is applied in the field of composite material preparation technology and equipment, copper-based composite material preparation technology and special equipment, to achieve the effects of improving productivity, avoiding small-scale agglomeration, and simplifying the production process

Active Publication Date: 2015-08-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the solidification process, ceramic particles will gather and agglomerate at the solid-liquid interface. In order to solve this major problem, the present invention uses an opposing rotating magnetic field at the solid-liquid interface to drive the copper melt at the front of the solidification interface to perform complex turbulent movement and rubbing. Twisting movement, so that the ceramic particles or whiskers can be fully dispersed. In addition, the unique solidification interface of upward continuous casting is above the copper melt, and the copper melt is in close contact with the crystallizer, so strong stirring will not bring in gas and Inclusions, so it can avoid the shortcomings of particle agglomeration, gas entrainment and slag entrainment in traditional down-draw continuous casting

Method used

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  • Preparation method of long-dimension dispersion-strengthened copper-based composite material and its melting and casting device
  • Preparation method of long-dimension dispersion-strengthened copper-based composite material and its melting and casting device
  • Preparation method of long-dimension dispersion-strengthened copper-based composite material and its melting and casting device

Examples

Experimental program
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Effect test

Embodiment 1

[0045] In this example, see figure 2 and image 3 , a long-dimensioned Al 2 o 3 Preparation method of dispersion strengthened Cu-based composite material, using Al 2 o 3 As the reinforced phase dispersion material, copper is used as the matrix material, that is, Al is added to the copper melt according to the composition ratio of 5% by mass fraction. 2 o 3 Ceramic powder particles are mechanically stirred for the copper melt, and two opposing rotating magnetic fields are combined to generate a strong turbulent flow at the front of the solidification interface of the copper melt, fully stirred, and the upward continuous casting process is adopted to make the upward continuous Cu-Al prepared during casting 2 o 3 Composite grain refinement, and make the strengthening phase Al 2 o 3 Dispersed particles are uniformly distributed in the copper-based composites, thereby preparing long-sized Al 2 o 3 Dispersion strengthened Cu matrix composites.

[0046] In this example, ...

Embodiment 2

[0052] This embodiment is basically the same as Embodiment 1, especially in that:

[0053] In this embodiment, silicon carbide whiskers are used as the reinforced phase dispersion material, and the silicon carbide whiskers used are fine whiskers with a diameter of less than 10 μm and an aspect ratio exceeding 20. Also at 1150 ° C, the powder pushing device 6 Send the fine silicon carbide whiskers into the bottom of the copper liquid at a speed of 5mm / s. The silicon carbide whiskers have a density lower than that of the copper liquid, and will slowly float up under the action of buoyancy. At the front of the solid-liquid solidification interface, it is evenly distributed under the action of the strong turbulent flow generated by the 200mT rotating magnetic field, and is engulfed by the solidification interface. The speed is 5mm / s, and the copper liquid is continuously replenished to stabilize the liquid level at a certain height, and then the addition of silicon carbide whisker...

Embodiment 3

[0055] This embodiment is basically the same as the previous embodiment, and the special features are:

[0056] In this embodiment, graphite particles with a diameter of 0.1 μm are sent into the bottom of the copper liquid as a strengthening phase, and the addition rate is the same as that of the previous example. / s, under the action of a 200mT rotating magnetic field, the graphite particle dispersion-strengthened Cu-based composite was prepared with a strengthening phase volume fraction of 8%.

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Abstract

The invention discloses a preparation method of a long-size dispersion strengthening copper-based composite material. The preparation method comprises the following steps of: adding strengthening phase material dispersion particles in a copper melt, utilizing a mechanical stirring method on the copper melt, adopting two apposition rotating magnetic field combining manners to generate powerful turbulence on the front edge of a copper melt solidification interface, adding an upper leading continuous casting process, refining the copper-based composite material particles prepared in the upper leading continuous casting process, enabling the strengthening phase material dispersion particles to uniformly distribute in the copper-based composite material, and preparing the long-size dispersion strengthening copper-based composite material. The invention also discloses a copper-based composite material casting device. The preparation method and the copper-based composite material casting device provided by the invention can realize serialization production, the prepared long-size dispersion strengthening copper-based composite material can keep the high electric conductivity, meanwhile, the intensity of the long-size dispersion strengthening copper-based composite material is greatly improved, in addition, the equipment is simple, the long-size dispersion strengthening copper-based composite material can be produced in a large scale, the production cycle is shortened, and the long-size dispersion strengthening copper-based composite material has the good economic benefits.

Description

technical field [0001] The invention relates to a composite material preparation process and equipment, in particular to a copper-based composite material preparation process and special equipment, which are applied in the technical field of composite material solidification. Background technique [0002] As a material with good electrical and thermal conductivity, copper-based composite materials have attracted much attention in social life, but because pure copper is a very soft material, it is limited in some applications, so the improvement of copper-based materials The intensity has become the focus of scholars' research. In general, the methods to improve the strength of copper-based materials are: strain strengthening, solid solution strengthening and aging strengthening, but because the above three strengthening methods will cause crystal defects, such as: dislocations, vacancies and lattice distortion, so although copper-based The strength of the material is improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C1/10B22D11/04B22D11/115
Inventor 钟云波李明杰杨辉王怀李强周鹏伟任维丽雷作胜黄靖文
Owner SHANGHAI UNIV
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