Preparation method of Cu-Ag composite material with oriented structure

Abstract

The invention discloses a preparation method of a Cu-Ag composite material with an oriented structure, which comprises the following steps: regulating an Ag nano precipitated phase of an alloy into an oriented arrangement structure by adopting a process of combining directional solidification with directional annealing, and preparing a Cu-Ag deformation in-situ composite material with high strength and high conductivity; the composite material is composed of 2%-10% of Ag, 0.1%-1% of Cr, 0.05%-0.15% of Zr and Cu. Firstly, a plate blank with an oriented solidification structure is prepared under the action of a magnetic field and a gradient temperature field, longitudinal long crystal grains are formed on a base body, and Cr particles are pinned at a crystal boundary; after solution treatment and rolling of the plate blank, directional annealing is conducted in a gradient temperature field, recrystallization is controlled to be conducted in the longitudinal temperature gradient direction, Ag nanometer precipitated phases are arranged in the longitudinal direction in an oriented mode, and finally the composite material plate blank is manufactured through multi-pass rolling; by controlling grain orientation, Cr particle distribution and Ag phase precipitation direction, the composite material has excellent tensile strength and conductivity.

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