Effects of diffusion annealing and hot rolling temperature on Ti-Cu interfacial bonding strength

doi:10.13251/j.issn.0254-6051.2020.01.025

Abstract

Abstract: Effects of diffusion annealing temperature and holding time on the interfacial bonding strength of a hot-extruded Ti-Cu composite rod by using diffusion treatment, and proper hot rolling temperature were selected by testing the tensile properties of Ti and Cu at high temperature. The results show that the diffusion annealing can effectively promote the diffusion of metal atoms at the interface and enhance the bonding strength. When the diffusion annealing is at 780-800 ℃ for 30 min, the bonding strength of the composite interface is the highest. The hot-rolling temperature of the Ti-Cu composite rod should be 780 ℃ at which the strength and plasticity indexes of Ti and Cu are similar and favorable for uniform deformation during hot rolling. The hot rolling bonding mechanism of the Ti-Cu composite rod can be explained by N.Bay theory, thermal mechanism and dislocation theory.

Key words: titanium copper composite rod, diffusion annealing, hot rolling, bonding strength

CLC Number:

TG335.7

Chen Shengchuan, Cai Guoshuai, Zhu Baohui, Ma Le, Wang Lu. Effects of diffusion annealing and hot rolling temperature on Ti-Cu interfacial bonding strength[J]. HTM, 2020, 45(1): 126-129.

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