Continuous friction stir and extrusion production method for metal matrix composite and production device thereof

Abstract

The invention provides a continuous friction stir and extrusion production method for a metal matrix composite and a production device thereof. According to the method and the device, a concave grooveis processed on a straightened matrix metal bar, a reinforcement is added into the concave groove, a composite blank is pressed into an annular groove of an extrusion wheel through a material pressing wheel and is clamped, the blank is driven to move towards a stirring head through rotation of the extrusion wheel, friction stir processing is carried out on the blank in the annular groove betweenthe material pressing wheel and a mold cavity at least once through rotation of the stirring head, the flowing direction is changed after the stirred blank is blocked by a material blocking block, theblank is extruded out from an inner hole of a mold, and therefore a continuous large-length metal matrix composite wire product is formed.

Description

technical field [0001] The invention relates to the field of advanced manufacturing technology, in particular to a processing method and equipment for large-length ultra-fine-grained metal matrix composite materials and wires. Background technique [0002] With the continuous advancement of nanotechnology and the urgent need for lightweight, the research and application fields of nano-reinforcement reinforced light alloy composites are gradually expanding. At present, the research on nano-reinforcement reinforced light alloy composites mainly focuses on improving the dispersion and interfacial bonding of the reinforcement, and pays less attention to the light metal matrix structure. Equal channel extrusion (ECAP), high pressure torsion (HPT), Deformation methods such as friction stir (FSP) and high-reduction controlled rolling, refine the metal matrix into ultra-fine crystal or nano-crystalline structure, and develop composites with nano-materials as reinforcements and ultra...

AI Technical Summary

Problems solved by technology

In recent years, friction stir processing (FSP) has received more and more attention. Compared with other ultra-fine-grained materials prepared by SPD, FSP has a uniform and stable ultra-fine-grained structure and excellent mechanical properties. It can also be used to prepare metals. matrix composite materials, but with this method, ultra-fine-grained materials are only formed in the stirring processing area, and friction stir processing is difficult to obtain uniform and dense materials at one time, and this method can only obtain bulk materials or original materials. There are products for surface modification

There is no ideal solution for the preparation of long-length metal matrix composite materials and wires with ultra-fine grains, uniform and stable structure, and excellent mechanical properties.

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