Water turbine runner for seawater pumped storage power generation, its manufacturing method and sea water pumping power plant

摘要

The object of the present invention is to provide a high strength and high corrosion resistance, a water tank runner for a seawater pumped storage power generating power plant having a welded structure using a rolling material or a forging material of a two-phase stainless steel, and a sea water pumping power plant. The present invention is for a two-phase stainless steel with a ferrite phase and an austenite phase, or a two-phase stainless steel or a forging material comprising two or more types of Nb, V, Al, Ti and B or less than 2.0% by welding or forging material such as an electron beam A water turbine runner for seawater pumped storage power generation and its manufacturing method are used in the sea water pumping power generation plant using the runner.