Posco Co., Ltd

Posco

Toshiba Mitsubishi-electric Industrial Systems Corporation

Seong-Cheol Hong

Ki-Young Min

Se-Min Park

Chang-Ho Kim

Won-Gul Lee

Dong-geun Kim

Oho-Cheal Kwon

Jong-Tae Park

Oh-Yeoul Kwon

Gyoo-Taek Lee

Jung-Moon Kang

Hyun-Chul Park

Ju Seung Lee

Choong Soo Lim

Kyu-Bum Han

Sang-Uk Ha

Jae Soo Kim

Inami Haruki

Nitta Isoko

Wakamiya Yoshinori

Seong-Gap Choi

Young-Jun Jo

Kwan-Soo Kim

Cheol-Jae Park

An alien substance removing apparatus according to one embodiment of the present invention may comprise: a hood unit provided adjacent to an electrical steel sheet and for collecting an alien substance generated in the electrical steel sheet by laser irradiation; and a scraping unit coupled to the hood unit and scraping and removing the alien substance attached to one surface of the hood unit facing the electrical steel sheet.

Alien substance removing apparatus and electrical steel sheet manufacturing facility having thereof

A foreign substance capturing apparatus according to an embodiment of the present invention may comprise: a capturing body unit having an inlet port for introducing the air including magnetic foreign substances and an outlet port for discharging the air from which the magnetic foreign substances have been removed; and a magnetic isolation unit connected to the capturing body unit, including a magnetic member for isolating, by an attractive force, the magnetic foreign substances from the air flowing in the capturing body unit, and provided with a nonmagnetic member surrounding the magnetic member.

Foreign substance capture apparatus and facility for manufacturing electrical steel sheet including same

A foreign substance collecting apparatus according to one embodiment of the present disclosure may comprise: a collection body unit formed with a suction port through which air including foreign substances flows in and a discharge port through which air removed of the foreign substances is discharged; and a mixing unit provided inside the collection body unit and disposed on a flow passage of the air, and forming a vortex in washing water contained therein by inducing a rotary flow of the air.

Foreign substance collecting apparatus and electrical steel sheet manufacturing facility including same

A grain-orientation electrical steel sheet according to an exemplary embodiment of the present invention includes a linear groove formed in a direction intersecting with the rolling direction, the groove includes the gradient section and the uniform section on a cross section including the transverse direction of the groove and the rolling surface normal direction of the steel sheet, and a length of the gradient section (GS) and the length of the uniform section (US) satisfy Equation 1 below.0.1≤[GSL]/[USL]≤0.5  [Equation 1]

Grain-oriented electrical steel sheet and magnetic domain refinement method thereof

A grain-oriented electrical steel sheet according to an embodiment of the present invention includes: a groove on a line formed on one surface of an electrical steel sheet in a direction crossing a rolling direction; and a thermal shock portion on a line formed on one surface of the electrical steel sheet in the direction crossing the rolling direction, wherein a distance between the groove and the thermal shock portion is 1 mm or less.

Grain-oriented electrical steel sheet and magnetic domain refining method therefor

A method for refining magnetic domains of a grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes: a step of preparing a grain-oriented electrical steel sheet; and a step of forming a groove by irradiating a quasi-continuous laser beam of which a duty is from 98.0 to 99.9% on a surface of the grain-oriented electrical steel sheet.

Method for refining magnetic domains of grain-oriented electrical steel sheet

A method for refining a magnetic domain of a grain-oriented electrical steel strip is provided, including a steel strip supporting roll position adjusting step of controlling a position of the steel strip in a vertical direction while supporting the steel strip proceeding along a production line, a laser irradiating step of forming a groove on a surface of the steel strip by irradiating a laser beam onto the surface of the steel strip to melt the steel strip, and a detecting step of detecting a defect in the groove formed on the surface of the steel strip while the steel strip proceeds, so as to be able to detect whether the groove is defective by confirming a machining state of a magnetic domain refined groove formed on the surface of the steel strip in a working process.

Method for refining magnetic domain of grain-oriented electrical steel plate and device therefor

A grain-oriented electrical steel plate of an exemplary embodiment of the present invention has a groove formed on a surface, wherein a curvature radius RBb at a position where a depth of the groove is maximum is 0.2 &#x3bc;m to 100 &#x3bc;m, and a curvature radius RSb on the groove surface from the position where the depth of the groove is maximum to a quarter-way position of the depth D of the groove is 4 &#x3bc;m to 130 &#x3bc;m.

Grain-oriented electrical steel plate and manufacturing method thereof

The present invention relates to an apparatus and method for diagnosing faults in hot strip finishing rolling, which diagnoses thickness faults in hot strip finishing rolling, using preset data and real-time data on rolling and control conditions, equation models representing control and physical phenomena and a database constructed based on operation experiences. The present invention comprises: a Supervisory Control Computer (SCC); an actually measured data collection unit; an exit side thickness gauge loaded-on determination unit; a part identification unit; an on-gauge ratio calculation unit; a primary fault determination unit; a secondary fault determination unit; and a confidence rate evaluation unit.

Apparatus and method for diagnosing faults in hot strip finishing rolling

Growing community of inventors

Pohang-si, South Korea

Seong-Cheol Hong