Manufacture Process Study of Sanicro25 for Large-Diameter Seamless Steel Tubes Employed in Ultra-Supercritical Generator Sets

摘要

In this paper, Sanicro25, a material for ultra-supercritical generator sets, was trial-produced for large-diameter thick-walled steel tubes. The blank is subjected to closed upsetting and vertical extrusion to obtain a large-diameter seamless steel pipe with good surface quality. After solution treatment at different temperatures, the mechanical properties of the material are comparable to that of small-diameter seamless steel pipes.