公开(公告)号：US09975170B2

公开(公告)日：2018-05-22

申请号：US14954218

申请日：2015-11-30

Applicant: POSCO

Inventor： Man Jin Ha ,  Jin Ho Kim ,  Suk Kyun Hwang ,  Sung Jin Park

IPC: B22D11/00 ,  B22D11/06 ,  B22D11/117 ,  C22C38/58 ,  C22C38/02 ,  C22C38/00

CPC classification number: B22D11/117 ,  B22D11/002 ,  B22D11/0622 ,  C22C38/001 ,  C22C38/02 ,  C22C38/58

Abstract: There is provided a method of manufacturing a high nitrogen duplex stainless steel sheet through a twin roll strip casting process without the occurrence of surface swelling on the high nitrogen duplex stainless steel sheet.

公开(公告)号：US11072838B2

公开(公告)日：2021-07-27

申请号：US16072167

申请日：2016-12-26

Applicant: POSCO

Inventor： Seung Ho Lim ,  Do Ryun Lee ,  Jin Ho Kim ,  Myung Sik Chun ,  Gyoo Taek Lee ,  Seong Cheol Hong

IPC: C21D9/56 ,  B23K26/08 ,  B23K26/14 ,  C21D6/00 ,  C21D10/00 ,  B23K26/354 ,  B23K26/364 ,  C21D8/12 ,  B23K26/142 ,  B23K37/047 ,  B23K26/12 ,  B23K26/03 ,  B23K26/40 ,  B23K26/359 ,  B23K26/04 ,  B23K26/082 ,  B23K26/70 ,  B23K103/04 ,  B23K101/16

Abstract: To optimize equipment and processes to enhance magnetic domain refinement efficiency and to enhance workability to improve processing capability, a method of refining a magnetic domain of a grain-oriented electrical steel plate includes zigzag controlling for transferring the steel plate without being inclined in right and left directions along a production line center, steel plate support roll position adjusting for controlling a position of the steel plate in up and down directions while supporting the steel plate, laser beam irradiating for irradiating a laser beam to a surface of the steel plate to melt the steel plate to form a groove in the surface of the steel plate, and removing for absorbing and removing radiant heat due to reflection of the laser beam irradiated to the surface of the steel plate during the laser beam irradiating.