Single-process machining method of multilayer metal composite material

Abstract

The invention discloses a single-process machining method of a multilayer metal composite material. The single-process machining method is characterized in that two or more solid metals or alloys are taken as raw materials, and circular arc workpieces of the different metals or the different alloys are placed closely and are spliced into a complete tube-shaped sample; the internal wall and the external wall of the tube-shaped sample are completely restrained by an internal restriction body and an external restriction body, pressure is applied to the annular end faces or the cylindrical surface of the tube-shaped sample, and the internal restriction body and the external restriction body rotate oppositely around a center axis shared by the internal restriction body, the external restriction body and the circular arc workpieces; the circular arc workpieces undergo tangential shearing deformation under a high hydrostatic pressure condition, constant growth of the contact surfaces of the different metals is realized, and interface multiplication is formed; and with the continuous increasing of a rotation angle, initial interfaces penetrating through the interior and the exterior of the tube-shaped sample, which are initially formed through close contact of the circular arc workpieces of the different metals gradually develop into spiral interfaces of which starting points and terminal points are formed at the internal wall and the external wall of the complete tube-shaped sample, and the spiral interfaces are wound by several circles in the tube wall, thereby forming a multilayer metal composite material structure. With the adoption of the single-process machining method, the disadvantages that the traditional metal layer composite material machining method is complicated, and low in efficiency, interfaces are prone to be polluted by the environment and the interface bonding quality is poor are overcome, and the multilayer metal composite material having required components, the required number of layers, the required layer thickness and the like can be prepared by a single process.

Description

technical field [0001] The invention relates to the field of plastic processing, in particular to a new processing method for preparing multi-layer metal composite materials in a single process. Background technique [0002] Interfaces such as grain boundaries, phase boundaries, and surfaces are critical to the performance of materials, and their effects are reflected in different microstructure scales such as coarse grains, ultrafine grains, or nanocrystals. Especially for nanostructured materials, the interface will dominate many material behaviors, so that nanomaterials show extraordinary and unique properties compared with coarse crystals. [0003] Composite materials are multi-phase materials prepared by compounding two or more materials such as metal materials, ceramic materials or polymer materials. The interfaces between several materials that make up composite materials can still be distinguished. In terms of performance, they learn from each other's strengths and ...

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