Forging forming method for key thick tube plate forgings of nuclear power steam generators
The tube sheet,serving as a crucial component within the core of a nuclear steam generator,possesses the distinctive characteristics of large diameter and substantial thickness.In terms of performance,it necessitates not only compliance with technical requirements in different parts of the sample but also demands a certain degree of uniformity.In this study,a dissection analysis was conducted on a steam generator tube sheet with a thickness exceeding 500 mm and the uniformity of performance in different regions was assessed.It was experimentally demonstrated that maintaining the Ni element above 0.90％(mass fraction)within the standard range is conducive to enhancing the material's low-temperature toughness.The non-plasticized transition temperature at the center of the tube sheet can reach-26 ℃,exhibiting significant margin of surplus compared to the standard.This comprehensive investigation effectively validates the smelting,forging,and heat treatment processes of the extra-thick tube sheet.The results provide both theoretical insights and practical support for improving the performance indicators of extra-thick tube sheets.
Tube plate of steam generatorUltra-thickForgingNon-plasticized transition temperature508-3
万方数据
维普
