Diffusion-strengthened copper prepared by nano particle stirring method and preparation method thereof

Diffusion-strengthened copper prepared by a nano particle stirring method is provided; a nano component is Al2O3, after surface modification, the Al2O3 is directly added into a copper matrix under a stirring action and can be uniformly distributed. A preparation method comprises the steps: modifying the surface of nano Al2O3, and then packaging the nano Al2O3 in a copper tube; preparing according to the components, firstly, adding a copper plate into smelting to 1180-1200 DEG C, covering the surface with a layer of charcoal powder with the thickness of more than 2 mm, then adding the packaged nano Al2O3 in a smelting furnace in a dispersion feeding mode, after stirring, allowing to standing for 30 minutes, pouring into a horizontal continuous casting heat-preserving furnace, and at the temperature of 1150 DEG C, casting into a casting blank; carrying out cold-hot deformation, to obtain a finished tube rod profile having the characteristics of a high-strength and high-conductivity copper alloy material. The diffused strengthened copper is characterized in that the nano Al2O3 having the surface modified can be directly added to the copper melt, a technology of stirring coupling surface modification of the nano Al2O3 is adopted, nanoparticles are uniform in distribution, and the casting blank is stable in properties, has no inclusion and is low in cost and suitable for industrialized continuous production. The finished product has the characteristics of high strength and high conductivity.