Effect of deformation heat treatment on microstructure and properties of Cu-6Ni-3Ti alloy

doi:10.13251/j.issn.0254-6051.2023.07.016

Abstract

Abstract: Morphology and composition of Cu-6Ni-3Ti alloy were characterized by means of X-ray diffractometer(XRD), scanning electron microscope(SEM) and transmission electron microscope(TEM). The effect of deformation heat treatment on microstructure and properties of the alloy was studied. The results show that microstructure of the as-cast alloy is dendritic and mainly composes of α-Cu and CuNiTi phases. The hardness of the alloy decreases significantly after heat treatment. With the increase of cold deformation, the conductivity of the alloy increases significantly after aging, but the hardness of the alloy decreases greatly after peak hardness. After aging at 450 ℃ for 2 h with 90% deformation, the hardness and conductivity of the alloy are 203 HV0.5 and 52%IACS, respectively.

Key words: Cu-6Ni-3Ti alloy, CuNiTi phase, microstructure, hardness, conductivity

CLC Number:

TG146.1

Jing Qingxiu, Wei Dandan, Wei Miao, Yang Xueqing, Xiao Xiangpeng, Hang Xiaodong. Effect of deformation heat treatment on microstructure and properties of Cu-6Ni-3Ti alloy[J]. Heat Treatment of Metals, 2023, 48(7): 91-96.

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