Effect of Zr Addition on Microstructure and Properties of Cu-Ag-Ti Alloys

摘要

Effects of small addition of Zr on the microstructures and properties of as-cast Cu_(50)Ag_(46-x)Zr_xTi_4 alloys were investigated by differential scanning calorimeter (DSC), x-ray diffraction, microscope, and property testings. The results show that the melting point of the Cu_(50)Ag_(46)Ti_4 alloys does not change obviously with the addition of Zr at the melting points of about 779℃. Adding Zr reduces the volume fraction and size of the board strips of Cu_3Ti phase, promotes the uniform distribution of the new phase Cu_4AgZr, and improves the Vickers hardness and shear strength of the based alloys. Moreover, increasing the Zr content can improve the high-temperature oxidation resistance of alloys.