Effect of Cold Deformation and Aging Treatment on Microstructure and Properties for Cu-15Cr-Ce In-situ Composites
The effects of cold deformation and aging treatment on the microstructure and properties of Cu-15Cr-0.1 Ce alloy were investigated by an optical microscope,a scanning electron microscope,an electronic tensile-testing machine and a metal conductivity instrument.The results show that the conductivity and mechanical properties of Cu-15Cr-0.1Ce are significantly improved by appropriate cold deformation and aging treatment.It is known that dispersion precipitation of the fiber phase is an important reason for the high strength of large plastic deformation alloys.And the high conductivity is due to the large amount of atomic solution precipitated from the Cu matrix and the electron scattering rate reduced.The alloys canobtainthe optimum performance through cold deformation(η=6)+(550 ℃,1 h)aging,and the tensile strength,electrical conductivity,hardness and elongation are 802 MPa,72.8％IACS,28HRC and 8.45％,respectively.On this basis,a model of the microstructure evolution of Cu-Cr in-situ composites has been established to explain the mechanism of fiber formation.
万方数据
维普
