| Due to high strength, high conductivity and excellent wear resistance, Cu-Cr alloys are widely used in electrified railway contact wire, continuous casting crystallization lining, asynchronous traction motor rotor and wear-resistant electrical contacts. The simulation of the solidification structures in the solidification process of Cu-0.1Cr-0.08Zr-0.08Ag alloy was carried out by CA-FE method in ProCAST. The results show that, during solidification process, along the outer surface of the mold wall, the thin layer of fine grains is produced, and then the columnar grains with consistent geometric orientation are formed, while the core of the casting billet is composed of many equiaxed grains. With the increasing of cooling rate, the grains become smaller. The calculation results fit the experimental ones well, and then the validity of the model is tested. |