Electric melting method for forming cylinder of pressure vessel of nuclear power station

An electric melting method for forming a cylinder of a nuclear power station pressure vessel, characterized in that

• providing a high-energy heat source composed of electric arc heat, resistance heat, and electroslag heat to melt a raw metal wire which is fed continuously, and create a metal component by solidifying and depositing the molten metal wire on a base material layer by layer;
• providing an electric melting head and a base material being connected to the anode and cathode of a power supply respectively;
• wherein, during the forming of the metal component, the raw wire is fed to a surface of the base material by a feeder and the electric melting head to generate the electric arc between the raw wire and the base material under the protection of the deposit of granular auxiliary material, wherein the electric arc melts certain of deposited auxiliary material and crates a molten slag pool;
• an electric current flows through the raw wire and the molten slag pool of auxiliary material and generates the resistance heat and the electroslag heat;
• wherein the raw wire is molten under the high-energy heat resource composed of the electric arc heat, the resistance heat and the electroslag heat, and thereby creating a molten pool on partial surface of the base material;
• wherein the raw wire and the auxiliary material are continuously fed and a computer is employed to control the relative movement between the electric melting head and the base material based on laminated slice data of the formed component, such that the molten pool is rapidly cooled, solidified and deposited on the base material and thus forms the cylinder of the pressure vessel for a nuclear power station.