Method for producing fine granule composite materials by utilizing cored wire technology
A composite material and cored wire technology, which is applied in the field of producing fine-grained composite materials using cored wire technology, can solve the problem of hard fine-grained floating aggregation, matrix material and reinforcement material are not easy to mix uniformly, and reduce the performance of composite materials, etc. problems, to achieve the effect of reducing the amount of reprocessing, lowering the pouring temperature and improving the quality
Inactive Publication Date: 2010-10-27
吴强
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Problems solved by technology
Because the physical properties of the components of fine-grained composite materials are usually quite different, such as different melting points and densities, it is not easy to mix the matrix material and the reinforcement material evenly during production, and sometimes a large number of hard fine particles will float. Agglomeration phenomenon, which reduces the performance of the composite
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Embodiment 1
[0022] The method of using cored wire technology to produce fine-grained composite materials is to weave and combine the cored wires containing the hard particles that need to be compounded, so that the structure and shape are combined with the size and structure of the mold space, and then put into the mold , so that after the molten metal is poured into the mold, the metal sheath of the cored wire is melted first, and then releases hard fine particles, which diffuse in the liquid metal, and when the metal solidifies, the required fine particles are obtained Composite materials, because the spatial structure of the braided cored wire has a certain strength, and the different parts are connected to each other, so it can be ensured that the spatial position of the cored wire will not change significantly due to the density difference between the liquid metal and it, so The position of the cored wire in the mold can be adjusted at will, so the accuracy of the position where the c...
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The invention provides a method for producing fine granule composite materials by utilizing cored wire technology. In the existing methods, with reduction of temperature, the liquidity becomes worse, stirring is not easy and the granule dispersion capacity is reduced. The method comprises the following steps: a. weaving the cored wires filled with hard granules needing to be compounded and ensuring the structure shapes to conform to the casting mold space size and structure; b. putting the processed cored wires into the casting mold, after molten metal is poured into the casting mold, firstly melting the metal crust of the cored wires, releasing the hard fine granules and ensuring the hard fine granules to disperse in liquid metal; c. controlling the dispersion time of the fine granules and the solidification velocity of the molten metal by adjusting the pouring temperature of the molten metal, the crust thickness of the cored wires, the positions of the cored wires in the casting mold space and the types of the granules in the cored wires, wherein the pouring temperature and the crust thickness increase in the same direction; and d. obtaining the needed fine granule composite materials after metal solidification. The method is used for in-mold inoculation of the cast iron by utilizing the cored wires and improves the performance of the castings.
Description
Technical field: [0001] The invention relates to a method for producing fine-grained composite materials using cored wires with different requirements. Background technique: [0002] Existing methods usually use vibration, stirring, etc., but as the metal solidifies, as the temperature decreases, the fluidity also becomes poor, it is not easy to stir, and the particle diffusion ability also decreases. The composite material obtained in this way Usually less than ideal. Moreover, even if the required fine-grained composite materials are obtained by stirring and vibrating, it is also very difficult to process these materials, because the physical properties of the reinforcement and the matrix in this composite material are generally very different, so when machining Requirements tools are also very specific. [0003] Among them, the fine-grain composite material evenly distributes hard fine particles in the matrix. For example, in the manufacture of fine-grained composite m...
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IPC IPC(8): B22D27/20
Inventor 吴玉彬吴强吴斐吴荷生
Owner 吴强