公开(公告)号：US20250019790A1

公开(公告)日：2025-01-16

申请号：US18711801

申请日：2022-12-13

Applicant: POSCO CO., LTD.

Inventor： Sangwoo CHOI ,  Namsuk LIM

IPC: C21D9/52 ,  C21D6/00 ,  C21D8/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

Abstract: The present invention relates to a graphite steel having excellent machinability, and a manufacturing method therefor, and more specifically, to a calcium-containing graphite steel having machinability superior to that of normal free-cutting steel and a manufacturing method therefor.

公开(公告)号：US20250034672A1

公开(公告)日：2025-01-30

申请号：US18715902

申请日：2022-12-13

Applicant: POSCO CO., LTD.

Inventor： Sangwoo CHOI ,  Namsuk LIM ,  Sewon PARK

IPC: C21D9/52 ,  C21D1/84 ,  C21D6/00 ,  C21D8/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

Abstract: The present disclosure relates to a graphite steel wire rod for TV PEM nut parts, a graphite steel, and a manufacturing and cutting method therefor, and more particularly, to a cutting method for manufacturing industrial parts, a graphite steel wire rod, a graphite steel wire rod, a graphite steel, and a manufacturing method therefor.

公开(公告)号：US20250043400A1

公开(公告)日：2025-02-06

申请号：US18716345

申请日：2022-12-13

Applicant: POSCO CO., LTD

Inventor： Sangwoo CHOI ,  Namsuk LIM

IPC: C22C38/14 ,  C21D8/06 ,  C21D9/52 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

Abstract: The present disclosure relates to a calcium-containing graphite steel wire rod, a steel wire, a graphite steel, and a manufacturing and cutting method thereof, and more particularly, to a cutting method for manufacturing industrial parts, a graphite steel wire rod, a graphite steel, and a manufacturing method therefor.