公开(公告)号：US20230257861A1

公开(公告)日：2023-08-17

申请号：US18105212

申请日：2023-02-02

申请人： DAIDO STEEL CO., LTD.

发明人： Nobuyuki TAKAHASHI ,  Daisuke Kudo ,  Tomohiro Ando ,  Yoshikiko Koyanagi

IPC分类号： C22C38/58 ,  C22C38/44 ,  C22C38/46 ,  C22C38/54 ,  C22C38/00

CPC分类号： C22C38/58 ,  C22C38/44 ,  C22C38/46 ,  C22C38/54 ,  C22C38/002 ,  C22C38/001

摘要： The present disclosure relates to an austenitic stainless steel contains C≤0.10 mass %, Si≤0.50 mass %, 3.0≤Mn≤8.0 mass %, P≤0.30 mass %, S≤0.30 mass %, 7.0 Ni≤12.0 mass %, 18.0≤Cr≤28.0 mass %, 1.0≤Mo≤3.0 mass %, 0.03≤V≤0.50 mass %, 0.0003≤B≤0.0300 mass %, 0.0001≤Ca≤0.0300 mass %, 0.35≤N≤0.80 mass %, W≤2.0 mass %, Zr≤0.20 mass %, Cu≤0.5 mass %, Al≤0.10 mass %, and O≤0.050 mass %, with a balance being Fe and unavoidable impurities. The austenitic stainless steel has a number density of coarse alloy carbonitrides of 3×105 pieces/mm2 or less.