| The influences of cold working and heat treatment on microstructures and properties of Cu-Cr-Zr-Ag alloy with high strength and high conductivity were studied by SEM, TEM, electronic universal testing machine and digital micro-ohm meter. Experimental results show that, after cold rolling, a large number of dislocations and cell structures appear in the microstructure of the alloy. The second phase precipitates are randomly dispersed in the matrix, when the alloy is aged at 500℃ for 1 hour. The tensile strength increases with the increase of cold rolling, and the highest tensile strength value is 632 MPa, while the elongation drops a little. The fracture surface of the aged alloy exhibits a large number of dimples and the fracture mode of the alloy is micro-porous condensation plastic fracture. |
