Research and Development of 800-MPa High-Strength Rim Sheet Steel

摘要

There is a very rich reservoir of hydropower resources in the southwestern region of China. Developing hydropower as a clean energy source is of tremendous practical significance for alleviating the power shortage and realizing sustainable development in China. The Wudongde and Baihetan Hydropower Station Project under construction are of the key power supply points in China's "power transmission from west to east" and the major projects in the lower reaches of the Jinsha River during the "12th Five-Year Plan" period. Baihetan Hydropower Station is designed to be China's first stand-alone capacity with "million kilowatts", which has a "landmark" significance in hydropower construction in China.Rim as a key component of large turbine generator rotor body, requiring high strength, high flatness and high magnetic induction performance' . Higher strength (yield strength > 800MPa) was required for Wudong, Baihetan project. At present, the highest yield strength of rim sheet steel at home and abroad is of 700MPa level, so it is urgent to develop 800MPa ultra-high strength rim sheet steel to meet the needs of China's hydropower development.