Microstructure and properties of annealed silver-copper plate for silver-copper foil rolling

doi:10.13251/j.issn.0254-6051.2021.12.029

Abstract

Abstract: Evolution of microstructure and microtexture, and their effects on Vickers hardness and corrosion resistance of rolled silver-copper plate during the annealing process were studied by means of optical microscope, electron backscattering diffraction technique, Vickers hardness tester and electrochemical workstation. The results show that during the annealing process, the average grain size increases. Moreover, the grain morphology evolves from rolled strip grains to equiaxed grains, at the same time, the texture type develops from deformed texture (copper texture, brass texture, S texture and R texture) to annealed texture (cube texture and {025}<001> texture). With the increase of annealing temperature, the content of small-angle grain boundary and the Vickers hardness of the silver-copper plate decrease, simultaneously, the content of ∑3 grain boundary increases, and the corrosion resistance first weakens and then increases. The content of cube texture is capable of reaching the highest when the silver-copper plate is heated at 300 ℃ for 10 min. Under this condition, the silver-copper plate exhibits excellent corrosion resistance, and the Vickers hardness reaches 60 HV0.3.

Key words: silver-copper plate, microstructure, texture, hardness, corrosion resistance

CLC Number:

TG146.1⁺1

Sun Yumei, Wang Xiaowen, Gong Benkui, Feng Rui, Fei Xiangyu, Zhao Weichao. Microstructure and properties of annealed silver-copper plate for silver-copper foil rolling[J]. Heat Treatment of Metals, 2021, 46(12): 180-186.

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