Method for preparing bimetallic composite material through pouring continuous casting

A composite material and bimetal technology, which is applied in the field of casting continuous casting to prepare bimetal composite materials, can solve the problems of uncontrollable interface width and poor interface bonding strength, and achieve the effect of slowing mutual convection and atomic diffusion.

Inactive Publication Date: 2016-12-14
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Therefore, if the technology and equipment for preparing bimetallic composite materials by liquid/liquid compounding can be used, relying on the unique properties of semi-solid metal paste, it is expected to solve the problems of uncontrollable interface width formed by liquid/liquid compounding, solid/solid compounding, solid/liquid In order to solve the problem of poor bonding strength of the inter

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  • Method for preparing bimetallic composite material through pouring continuous casting

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Embodiment Construction

[0022] The invention provides a kind of pouring continuous casting equipment for preparing bimetallic composite materials, comprising:

[0023] A crystallizer, the continuous casting dummy rod is arranged in the crystallizer;

[0024] An outer ladle connected to the melt inlet of the crystallizer, the outer ladle contains molten metal;

[0025] A flow guide system communicated with the crystallizer;

[0026] An in-ladle communicating with the diversion system, the metal semi-solid slurry is contained in the in-ladle;

[0027] The metal semi-solid slurry can enter the solidified liquid cavity formed by the metal melt in the crystallizer through the flow guide system.

[0028] see figure 1 , figure 1 It is a schematic structural diagram of the preparation device disclosed in the embodiment of the present invention, wherein, 1 is an inner ladle, 2 is a diversion system, 3 is an outer ladle, 4 is a crystallizer, 5 is a bimetallic composite material, and 6 is a metal semi-solid...

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Abstract

The invention provides a method for preparing a bimetallic composite material through pouring continuous casting. The method comprises the steps: (a) cooling liquid-state metal melt in a crystallizer, and forming an inverted-conical coagulating liquid hole under the action of a continuous casting dummy bar; (b) adding semi-solid-state metal slurry into the coagulating liquid hole through a diversion system, and carrying out coagulation, thereby obtaining a bimetallic composite cast ingot. The invention further provides equipment for preparing the bimetallic composite material through pouring continuous casting. According to the method and the equipment, firstly, the coagulating liquid hole with certain depth is formed by using the traditional continuous casting principle, and then, the semi-solid-state metal slurry is poured into the coagulating liquid hole through the diversion system, so that heterogeneous metal fluid coating composite casting is achieved; during coagulation, the internal semi-solid-state metal slurry and the outer-layer metal melt are subjected to convective mass transfer at an interface, and metal in the crystallizer is subjected to gradual coagulation from outside to inside, so that the bimetallic composite material, of which gradient transition of alloy composition to semi-solid-state texture to dendrite texture is formed between metal of inner and outer layers, is obtained.

Description

technical field [0001] The invention belongs to the technical field of composite metal ingot processing, and in particular relates to a method for preparing bimetallic composite materials by pouring continuous casting. Background technique [0002] The research on bimetallic composite materials has a history of more than half a century so far, although its preparation methods have derived various types from solid / solid composite, solid / liquid composite, to liquid / liquid composite, and then to semi-solid / solid composite. There are many composite processes, but there is only one essence: to obtain a continuous, stable and high-strength bonding interface. A continuous, stable and high-strength bonding interface is extremely important for the practical application of bimetallic composites, and it is also the premise and basis for the preparation of high-performance, multi-purpose bimetallic composites. [0003] The metallurgical bonding interface is to make the two metal materi...

Claims

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Application Information

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IPC IPC(8): B22D11/00B22D11/14
CPCB22D11/007B22D11/141
Inventor 郑小平陈连生田亚强宋进英魏英立
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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