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The effect of various cold deformation quantity and heat treatment on morphology of Cr phase and mechanical properties of copper alloy containing RE were studied. The results show that when reduction is to 70%, Cr phases are deformed heavily, and it is deformed to fibrous, while some of Cr phases are broken. After the following high temperature heat treatment, broken Cr phases in the microstructure dissolves, and tend to turn into spherical morphology. As a results this kind of alloy has an obvious aging strengthening characteristics, and precipitate phase is Cr. The optimum mechanical properties of copper alloy could be obtained by 70% deformation, and solution at 980 ℃ for 2 h, quenched in water, then aging at 500 ℃ for 4 h.
The effect of various cold deformation quantity and heat treatment on morphology of Cr phase and mechanical properties of copper alloy containing RE were studied. The results show that when reduction is to 70%, Cr phases are deformed heavily, and it is deformed to fibrous, After the following high temperature heat treatment, broken Cr phases in the microstructure dissolves, and tend to turn into the spherical morphology. As a result this kind of alloy has an obvious aging strengthening characteristics, and precipitate phase is Cr. The optimum mechanical properties of copper alloy could be obtained by 70% deformation, and solution at 980 ℃ for 2 h, quenched in water, then aging at 500 ℃ for 4 h.