公开(公告)号：US10082487B2

公开(公告)日：2018-09-25

申请号：US15107827

申请日：2013-12-26

申请人： POSCO

发明人： Choong Soo Lim ,  Myung Sik Chun ,  Hyeong Jun Huh ,  Boong Ho Son

IPC分类号： G01N29/28 ,  G01N29/04 ,  G01H3/00

CPC分类号： G01N29/043 ,  G01H3/00 ,  G01N29/28 ,  G01N2291/0234 ,  G01N2291/044 ,  G01N2291/2632

摘要： An apparatus and a method for ultrasonic detection are provided. The apparatus includes an injection nozzle which is installed below a steel plate being transported and forms a medium column by jet a medium toward the steel plate, an ultrasonic probe which is installed in the injection nozzle and transmits and receives ultrasonic waves for detecting flaws in the steel plate through the medium column, and a medium circulation unit which reclaims the medium which falls from the medium column and circulates the reclaimed medium to the injection nozzle.

公开(公告)号：US11072838B2

公开(公告)日：2021-07-27

申请号：US16072167

申请日：2016-12-26

申请人： POSCO

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

IPC分类号： 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

摘要： 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.

公开(公告)号：US11060163B2

公开(公告)日：2021-07-13

申请号：US16072143

申请日：2016-12-23

申请人： POSCO

发明人： Seong Cheol Hong ,  Jae Kyoum Kim ,  Ki Young Min ,  Se Min Park ,  Myung Sik Chun ,  Gyoo Taek Lee ,  Oh Yeoul Kwon ,  Hyun Chui Park

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

摘要： Provided is a method for refining magnetic domains of grain-oriented electrical steel plates including: a steel plate supporting roll position adjusting step of controlling a vertical direction position of the steel plate while supporting the steel plate; a laser radiating step of melting the steel plate by radiating a laser beam to form grooves on the surface of the steel plate; and a setting and maintaining step of setting and maintaining an internal operation environment of a laser room in which the laser radiation is performed, so as to increase magnetic domain refinement efficiency and improve workability by optimizing equipment and processes, thereby increasing the processing capacity.

公开(公告)号：US11000920B2

公开(公告)日：2021-05-11

申请号：US16072171

申请日：2016-12-23

申请人： POSCO

发明人： Gyoo Taek Lee ,  Myung Sik Chun ,  Seong Cheol Hong ,  Ki Young Min

IPC分类号： C21D8/12 ,  B23K26/082 ,  B23K37/047 ,  B23K26/16 ,  B23K26/354 ,  B23K26/364 ,  C21D10/00 ,  B23K26/08 ,  B23K26/352 ,  B23K26/70

摘要： By optimizing equipment and processing, magnetic domain miniaturization efficiency can be increased, workability can be improved, and processing ability can be increased through same. Provided is a method for miniaturizing the magnetic domains of a directional electric steel plate, the method comprising: a steel plate supporting roll position adjusting step of controlling the vertical direction position of a steel plate while supporting the steel plate progressing along a production line; and a laser emitting step of melting the steel plate by emitting a laser beam to form grooves on the surface of the steel plate, wherein the laser emitting step includes an angle changing step of changing an emitting line angle of the laser beam with respect to a width direction of the steel plate while an optical system emitting the laser beam onto the steel plate is rotated with respect to the steel plate, and a focal distance maintaining step of changing a tilt of the steel plate supporting roll which supports the steel plate according to a change in focal distance of the laser beam in the width direction of the steel plate.