公开(公告)号：US20190308240A1

公开(公告)日：2019-10-10

申请号：US16470359

申请日：2017-08-24

Applicant: POSCO

Inventor： Seung Ho Lim ,  Goo Hwa Kim ,  Kyung Hoon Nam ,  Yeong Seon Park

IPC: B22F1/00 ,  C23F4/00 ,  F27D3/00

Abstract: A material feeding apparatus is disclosed. An apparatus for removing a surface oxide of a metal material and feeding the metal material to a melting furnace, according to an embodiment of the present disclosure, includes: a housing including a material dropping chamber for feeding and discharging the metal material and a material etching chamber for performing a plasma etching process; and a pretreatment casing configured to reciprocate between the material dropping chamber and the material etching chamber in the housing, wherein the pretreatment casing receives the metal material from the material dropping chamber to store the metal material, moves to the material etching chamber to plasma-etch a surface oxide layer of the stored metal material, and then returns to the material dropping chamber to drop the etched metal material into the melting furnace.

公开(公告)号：US11167347B2

公开(公告)日：2021-11-09

申请号：US16470359

申请日：2017-08-24

Applicant: POSCO

Inventor： Seung Ho Lim ,  Goo Hwa Kim ,  Kyung Hoon Nam ,  Yeong Seon Park

IPC: B22F1/00 ,  C23F4/00 ,  F27D3/00 ,  C11D11/00 ,  C22B1/00 ,  C23G5/00 ,  F27D3/10

Abstract: A material feeding apparatus is disclosed. An apparatus for removing a surface oxide of a metal material and feeding the metal material to a melting furnace, according to an embodiment of the present disclosure, includes: a housing including a material dropping chamber for feeding and discharging the metal material and a material etching chamber for performing a plasma etching process; and a pretreatment casing configured to reciprocate between the material dropping chamber and the material etching chamber in the housing, wherein the pretreatment casing receives the metal material from the material dropping chamber to store the metal material, moves to the material etching chamber to plasma-etch a surface oxide layer of the stored metal material, and then returns to the material dropping chamber to drop the etched metal material into the melting furnace.

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.