Method integrated Preparation of extruding and impregnating composite material with parts forming and its device

Abstract

The present invention is an integrated method and equipment for the preparation of extrusion-impregnated composite materials and parts forming. The temperature is lower than the melting point of the powder. When the metal liquid infiltrated into the powder is cooled and solidified, a part made of composite material with the same shape and size as the cavity is obtained; the equipment consists of a press, a mold, a powder feeding device, and a liquid supply device. , The vacuum device is connected with each other. The invention has few technological processes, small equipment footprint, high production efficiency and high material utilization rate, is suitable for automatic mass production, can produce large parts, is convenient for manufacturing parts with complex shapes, and can produce dense multi-component materials. The composite material parts prepared by the invention have high precision, fine and uniform microstructure, repeatability, and the porosity content can reach the same level as that of dense materials, thereby reducing possible defects in the casting structure.

Description

(1) Technical field [0001] The invention relates to the technical field of composite material preparation and mechanical parts manufacturing, and specifically refers to an integrated method and equipment for extrusion-impregnation composite material preparation and part forming. (2) Background technology [0002] At present, the manufacturing method of the alloy is to melt the various component metals that constitute the alloy material and mix them in a liquid state. The components of the mixed metal liquid are made as uniform as possible by the method of stirring, and the method of adding a modifier is used to increase the number of crystal nuclei to achieve crystal grains. purpose of refinement. Since the liquid metal as a whole changes from a liquid state to a solid state, it must go through the process of nucleation, crystallization, and grain growth, and the location and quantity of nucleation are very random, and the microstructure is difficult to control. Common defec...

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Problems solved by technology

The method of stirring casting with powder particles in the liquid is to mechanically stir above the opening of the crucible to generate a vortex in the molten metal to introduce powder particles. The disadvantage of this method is that when the powder particle size is less than 10 μm, it cannot be passed through the stirring method Let the powder enter the metal liquid, and the powder cannot be evenly distributed in the matrix material, and 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 guaranteed. Guaranteed

Disadvantages of the method of casting composite materials: on the one hand, the finer the reinforcement particles, the higher the specific mechanical properties of the corresponding materials;

[0008] The parts produced by the casting method are generally not wear-resistant, have solidification shrinkage, and the dimensional accuracy is not high

[0009] The forging method can only produce blanks, which must be followed by machining. The precision is low, the steel deformation resistance is large, the mold wears seriously, and the mold life is low.

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