Effect of thermo-mechanical heat treatment on microstructure and properties of Cu-Ti-Fe-Sn alloy

doi:10.13251/j.issn.0254-6051.2022.10.005

Abstract

Abstract: Cu-3Ti-0.2Fe-1Sn alloy was prepared by the vacuum melting method. The alloy was treated by homogenization annealing, solution treatment, cold rolling(deformation of 40%, 60% and 80%, respectively) and aging at 450 ℃. The effect of thermo-mechanical on microstructure, conductivity and hardness of the alloy were investigated. The results show that microstructure of the as-cast Cu-3Ti-0.2Fe-1Sn alloy prepared by vacuum melting contains a large amount of dendritic microstructure, and grain growth occurs in the microstructure after solution treatment. The hardness and conductivity of the as-cast alloy are 178.1 HV and 10.85%IACS, respectively. After solution treatment, the hardness and conductivity of the alloy are reduced to 102.7 HV and 4.58%IACS, respectively. After cold deformation and aging treatment, the hardness is obviously improved. When the deformation is 60%, the hardness aging for 480 min reaches the peak value, the hardness and conductivity of the Cu-3Ti-0.2Fe-1Sn alloy are 310.2 HV and 18.59%IACS, respectively.

Key words: Cu-Ti alloy, thermo-mechanical heat treatment, microstructure, hardness, conductivity

CLC Number:

TG146.1

Jing Qingxiu, Sun Yuqing, Xiao Xiangpeng, Wei Miao, Peng Yong, Huang Xiaodong. Effect of thermo-mechanical heat treatment on microstructure and properties of Cu-Ti-Fe-Sn alloy[J]. Heat Treatment of Metals, 2022, 47(10): 24-30.

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