GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2018/117639

A8

A method for manufacturing a grain-oriented electrical steel sheet according to an embodiment of the present invention comprises the steps of: preparing a slab; heating the slab; hot-rolling the slab to manufacture a hot-rolled plate; hot band annealing the hot-rolled plate; cold-rolling the hot band annealed, hot-rolled plate, to manufacture a cold-rolled plate; subjecting the cold-rolled plate to primary recrystallization annealing; and subjecting the primary recrystallization annealed, cold-rolled plate to secondary recrystallization annealing, wherein the hot band annealing step includes a primary temperature elevation step, a secondary temperature elevation step, and a crack step, and the temperature elevation rate (t1) of the primary temperature elevation step and the temperature elevation rate (t2) of the secondary temperature elevation step satisfy the following formula 1. [Formula 1] 5 x t2 ≤ t1i

JPS6169922	MANUFACTURE OF GRAIN ORIENTED SILICON STEEL PLATE HAVING HIGH MAGNETIC FLUX DENSITY AND LOW IRON LOSS
JPH0748626	METHOD FOR DOMAIN REFINING OF ELECTRICAL STEEL BY LOCAL MECHANICAL DEFORMATION AND APPARATUS THEREFOR

SONG DAE HYUN (KR)
KIM SEUNG IL (KR)
PARK JUNE SOO (KR)
YANG IL NAM (KR)

PCT/KR2017/015125

August 23, 2018

December 20, 2017

Click for automatic bibliography generation  

POSCO (KR)

C21D8/12; C21D9/46; C22C38/00; C22C38/02; C22C38/04; C22C38/06; H01F1/147

YOU ME PATENT AND LAW FIRM (KR)

View/Download PDF      PDF Help

Previous Patent: ANNEALING SEPARATOR COMPOSITION FOR ORIENTED ELECTRICAL STEEL SHEET, ORIENTED ELECTRICAL STEEL SHEET...

Next Patent: NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME