Metal composite, preparation, forming method and equipment

A metal composite material and forming method technology, which is applied in the field of composite material preparation and forming, can solve the problem that the performance stability and reliability of composite materials cannot be guaranteed, it is difficult to obtain the optimal performance of materials by ordinary casting methods, and the microstructure is not repeatable and other problems, to achieve the effect of wide range of industrial applications, simple structure of equipment and molds, and high composition ratio

Inactive Publication Date: 2005-01-12
周照耀
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Problems solved by technology

The stirring casting method refers to the method of adding ceramic powder particles to the liquid metal for stirring casting. The specific process is to mechanically stir the metal liquid above the opening of the crucible to generate a vortex and introduce the powder particles. The disadvantage of this method is that when When the powder particle size is small (such as less than 10 μm), it is impossible to make the powder enter the metal liquid by stirring, and because the powder cannot be evenly distributed in the matrix material, the microstructure is not repeatable
The preparation methods of the above-mentioned composite materials cannot make the powder evenly distributed in the matrix material, the proportion of the powder material in the composite material is small, and the microstructure is not repeatable, so the stability and reliability of the performance of the composite material cannot be obtained. ensure
The disadvantages of the current casting method: on the one hand, the finer the reinforcement particles, the higher the specific mechanical properties of the corresponding material; on the other hand, the more serious the agglomeration of the finer particles, it is difficult to obtain the optimal performance of the material by ordinary casting methods
The melt infiltration process can make the powder evenly distributed in the matrix material, which has obvious advantages. The Chinese invention patent with the patent number ZL92106222.2 describes a method of preheating the ceramic powder under the condition of a pressure greater than 20MPa. Carry out impregnation, then rapidly cool and solidify, remelt and vibrate and stir, and finally cast the composite raw material. This method is to remelt the composite raw material obtained by impregnation after cooling, and requires vibration and stirring. The process is more, and There is no vacuum before impregnation, and the gas adsorbed by the powder material is not removed, which affects the bonding interface between the powder and the metal, thereby affecting the performance of the prepared parts or materials

Method used

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  • Metal composite, preparation, forming method and equipment
  • Metal composite, preparation, forming method and equipment

Examples

Experimental program
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Embodiment 1

[0033] The structure of the manufacturing equipment of metal composite material of the present invention is as figure 1 shown in figure 1Among them, the impregnation container 1 is a container tank made of steel plate that can hold liquid. The liquid will not leak out when it is contained in the tank. The silicon dioxide powder with an average particle size of 10 μm is spread on the bottom of the impregnation tank to a certain thickness, and Vibrate and shake the silica powder to form a powder bed 2; place the brass block 3 for melting and infiltration on the powder bed; put the impregnation tank containing the silica powder and brass block into 4 in the heating furnace (the heating furnace can be airtightly evacuated, or can be airtightly inflated to withstand a certain air pressure), after closing the furnace door, evacuate to reach a vacuum degree of 0.01Pa; the heater 7 in the heating furnace is in the heating process Melt the brass block; when the brass block 3 on the si...

Embodiment 2

[0035] This example is basically the same as Example 1, except that the metal used is a cast aluminum block, and the temperature for heating and heat preservation is 730°C. Perform die casting.

Embodiment 3

[0037] This embodiment is basically the same as the second embodiment, except that the obtained metal composite material of aluminum alloy and silicon dioxide in solid-liquid coexistence is cooled to a semi-solid state and then put into the cavity of a squeeze casting mold for extrusion casting.

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Abstract

A metallic composition is prepared from the metallic or non-metallic powder material A with high smelting point and the metallic material B iwth lower smelting point through mixing, vacuumizing while heating to a temp between the smelting points of A and B for smelting B, and holding the temp for penetrating the molten B into the powder material to obtain a solid-liquid composition. It can be shaped by casting, squeezing, rolling or directional solidifying.

Description

technical field [0001] The invention relates to composite material preparation and molding technology, in particular to a metal composite material and its preparation and molding method and device. Background technique [0002] General composite material casting methods mainly include stirring casting method, squeeze casting method, rheological casting method and melt infiltration casting method. The stirring casting method refers to the method of adding ceramic powder particles to the liquid metal for stirring casting. The specific process is to mechanically stir the metal liquid above the opening of the crucible to generate a vortex and introduce the powder particles. The disadvantage of this method is that when When the powder particle size is small (such as less than 10 μm), the powder cannot be stirred into the metal liquid by stirring. In addition, because the powder cannot be evenly distributed in the matrix material, the microstructure is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/00B22D17/30
Inventor 周照耀
Owner 周照耀
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