公开(公告)号：US20240175111A1

公开(公告)日：2024-05-30

申请号：US18179362

申请日：2023-03-07

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Chaofang DONG ,  Li WANG ,  Decheng KONG ,  Shiyuan ZHANG ,  Yucheng JI ,  Xiaogang LI

IPC: C22C33/02 ,  B22F10/28 ,  B22F10/64 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00 ,  B33Y80/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/48

CPC classification number: C22C33/0207 ,  B22F10/28 ,  B22F10/64 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00 ,  B33Y80/00 ,  C22C33/0285 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/48 ,  B22F2201/02 ,  B22F2301/35 ,  B22F2998/10 ,  B22F2999/00

Abstract: An additively manufactured high-strength and high-ductility stainless steel is characterized in that the composition, by weight percentage, C≤0.05 wt %, Si≤1 wt %, Mn≤1 wt %, Cr 14.5-15.5 wt %, Ni 5.0-5.5 wt %, Cu 4-4.5 wt %, Nb 0.35-0.45 wt %, and the balance of Fe and unavoidable impurities. And Cr equivalent of Creq=% Cr+% Mo+2.2% Ti+0.7% Nb+2.48% Al. Ni equivalent of Nieq=% Ni+35% C+20% N+0.25% Cu. The yield strength of the high-strength and high-ductility stainless steel ≥1270 MPa, the tensile strength ≥1380 MPa, and the elongation after fracture ≥15%.