公开(公告)号：US20230117314A1

公开(公告)日：2023-04-20

申请号：US17045267

申请日：2019-12-06

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Changheui JANG ,  Jiho SHIN ,  Byeong Seo KONG ,  Hyeon Bae LEE ,  Chaewon JEONG ,  Hyun Woo KOO

IPC: C22C38/58 ,  C22C38/48 ,  C21D8/02

Abstract: Austenitic stainless steel includes 16 to 26 wt % of chromium (Cr), 8 to 22 wt % of nickel (Ni), 0.02 to 0.1 wt % of carbon (C), 0.2 to 1 wt % of niobium (Nb), and 2 to 3.5 wt % of manganese (Mn), and has an austenite matrix, wherein a nanosized niobium carbide (NbC) is precipitated in the austenite matrix, and the nanosized niobium carbide is uniformly dispersed in the austenite matrix. The austenitic stainless steel may further include 0.5 to 1.5 wt % of molybdenum (Mo).

公开(公告)号：US20220090229A1

公开(公告)日：2022-03-24

申请号：US17537707

申请日：2021-11-30

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Chang-Heui JANG ,  Ji Ho SHIN ,  Byeong Seo KONG ,  Ho-Sub KIM ,  Hyeon Bae LEE

IPC: C21D9/46 ,  C21D6/00 ,  C21D6/02 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/48 ,  C22C38/50

Abstract: The austenitic stainless steel containing niobium according to an exemplary embodiment of the present invention includes: 16 to 26 wt. % of chromium (Cr), 8 to 22 wt. % of nickel (Ni), 0.02 to 0.1 wt. % of carbon (C), 0.2 to 1 wt. % of niobium (Nb), 0.015 to 0.025 wt. % of titanium (Ti), 0.004 to 0.01 wt. % of nitrogen (N), and 0.5 to 2 wt. % of manganese (Mn), wherein the austenitic stainless steel containing niobium has an austenitic matrix structure, a fine niobium carbide and a fine titanium nitride are precipitated in the austenitic matrix structure, and the fine niobium carbide is uniformly dispersed in the austenitic matrix structure.

公开(公告)号：US20210348248A1

公开(公告)日：2021-11-11

申请号：US16476597

申请日：2018-11-28

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Chang-Heui JANG ,  Ji Ho SHIN ,  Byeong Seo KONG ,  Ho-Sub KIM ,  Hyeon Bae LEE

IPC: C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C21D6/02 ,  C22C38/50 ,  C22C38/48 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

Abstract: The austenitic stainless steel containing niobium according to an exemplary embodiment of the present invention includes: 16 to 26 wt. % of chromium (Cr), 8 to 22 wt. % of nickel (Ni), 0.02 to 0.1 wt. % of carbon (C), 0.2 to 1 wt. % of niobium (Nb), 0.015 to 0.025 wt. % of titanium (Ti), 0.004 to 0.01 wt. % of nitrogen (N), and 0.5 to 2 wt. % of manganese (Mn), wherein the austenitic stainless steel containing niobium has an austenitic matrix structure, a fine niobium carbide and a fine titanium nitride are precipitated in the austenitic matrix structure, and the fine niobium carbide is uniformly dispersed in the austenitic matrix structure.