M.C. Somani
,
L.P. Karjalainen
金属学报(英文版)
Systematic physical simulation of thermo-mechanical processing routes has been applied on a Gleeble 1500 simulator to four copper alloys (mass %) Cu-0.57Co-0.32Si,
Cu-0.55Cr-0.065P, Cu-0.22Zr-0.035Si and Cu-1.01Ni-0.43Si aimed at clarifying the
influences of processing conditions on their final properties, strength and electrical
conductivity. Flow curves were determined over wide temperature and strain rate
ranges. Hardness was used as a measure of the strength level achieved. High hardness was obtained as using equal amounts (strains 0.5) of cold deformation before
and after the precipitation annealing stage. The maximum values achieved for the
Cu-Co-Si, Cu-Cr-P, Cu-Zr-Si and Cu-Ni-Si alloys were 190, 165, 178 and 193 HV5,
respectively. A thermo-mechanical schedule involving the hot deformation-ageing-cold
deformation stages showed even better results for the Cu-Zr-Si alloy. Consequently,
the processing routes were designed based on simulation test results and wires of 5 and
2mm in diameters have been successfully processed in the industrial scale.
关键词:
copper alloys
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