Preparation method of boron carbide-silicon carbide whisker toughened high-strength copper matrix composite

Abstract

The invention belongs to the field of nonferrous metal composites, in particular to a method for toughening a high-strength copper-based composite by nanometer boron carbide and silicon carbide crystal whiskers. An in-situ generated high-strength copper-based composite powder toughened by boron carbide and silicon carbide crystal whiskers consists of high-strength copper-based composite base material powder and nanometer boron carbide and silicon carbide crystal whisker powder. The high-strength copper-based composite base powder is uniformly mixed with the nanometer boron carbide and silicon carbide crystal whisker powder by a mechanical mixing process, a vacuum-sintered hot-pressed ingot is enabled to deform through extrusion, and the in-situ generated high-strength copper-based composite toughened by the nanometer boron carbide and silicon carbide crystal whiskers is obtained. As the in-situ generated copper-based composite toughened by the nanometer boron carbide and silicon carbide crystal whiskers has high tenacity, and at the same time, the wear resistance and the strength are greatly improved, the copper-based composite is particularly suitable for high-speed railway high-strength cables, high-end equipment manufacturing industry and the like and is particularly suitable for being used as a material for cutters, dies, aviation, aerospace and the like.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal composite materials, in particular to a method for toughening high-strength copper-based composite materials by using nanometer boron carbide-silicon carbide whiskers. Background technique [0002] Copper and copper alloy materials are currently widely used in industrial sectors such as power cables, electricians, motors, and high-end equipment manufacturing due to their good electrical conductivity, thermal conductivity, corrosion resistance, good plastic processing performance, and high strength. Because the strength and hardness of copper and copper alloy materials are much different from those of steel materials, and their content in nature is less, therefore, with the advancement of technology and industry, higher requirements are put forward for the mechanical properties of copper and copper alloys. Therefore, it is necessary to develop copper alloys with high strength and excellent plastic ...

AI Technical Summary

Problems solved by technology

The grain refinement method can effectively improve the mechanical properties of copper alloys, but this process is not yet industrialized and cannot be mass-produced

Alloying can also improve the mechanical properties of copper alloys, but a large amount of precious metal elements are added, resulting in high production costs of copper alloys