Grain Oriented Electrical Steel Sheet And Manufacturing Method Of Same

Abstract: A manufacturing method of a grain oriented electrical steel sheet according to one embodiment of the present invention comprises: a step of manufacturing a hot-rolled steel sheet by hot-rolling a slab; a step of hot-rolled sheet annealing the hot-rolled steel sheet; a step of primarily cold-rolling the hot-rolled sheet annealed hot-rolled steel sheet; a step of primarily decarburization annealing the primarily cold-rolled steel sheet; a step of secondarily cold-rolling the decarburization annealed steel sheet; a step of secondarily decarburization annealing the secondarily cold-rolled steel sheet; a primary non-oxidative annealing step of annealing the secondarily decarburization annealed steel sheet at a temperature of 1000? to 1200? and a dew point temperature of -20? or lower; a step of tertiarily cold-rolling the primarily non-oxidative annealed steel sheet; and a secondary non-oxidative annealing step of annealing the tertiarily cold-rolled steel sheet at a soaking temperature of 800? to 1000? for 30 seconds to five minutes.

Patent Information

Application #

Filing Date

13 June 2024

Publication Number

51/2024

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

Applicants

POSCO CO., LTD

(Goedong-dong) 6261 Donghaean-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37859

Inventors

1. KO, Hyun-Seok

c/o POSCO, (Goedong-dong) 6261, Donghaean-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37859

2. SEO, Jin-Wook

c/o POSCO, (Goedong-dong) 6261, Donghaean-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37859

3. HAN, Minsoo

c/o POSCO, (Goedong-dong) 6261, Donghaean-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37859

Specification

Documents

Application Documents

#	Name	Date
1	202417045697-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [13-06-2024(online)].pdf	2024-06-13
2	202417045697-STATEMENT OF UNDERTAKING (FORM 3) [13-06-2024(online)].pdf	2024-06-13
3	202417045697-REQUEST FOR EXAMINATION (FORM-18) [13-06-2024(online)].pdf	2024-06-13
4	202417045697-PROOF OF RIGHT [13-06-2024(online)].pdf	2024-06-13
5	202417045697-PRIORITY DOCUMENTS [13-06-2024(online)].pdf	2024-06-13
6	202417045697-POWER OF AUTHORITY [13-06-2024(online)].pdf	2024-06-13
7	202417045697-FORM 18 [13-06-2024(online)].pdf	2024-06-13
8	202417045697-FORM 1 [13-06-2024(online)].pdf	2024-06-13
9	202417045697-DRAWINGS [13-06-2024(online)].pdf	2024-06-13
10	202417045697-DECLARATION OF INVENTORSHIP (FORM 5) [13-06-2024(online)].pdf	2024-06-13
11	202417045697-COMPLETE SPECIFICATION [13-06-2024(online)].pdf	2024-06-13
12	202417045697-MARKED COPIES OF AMENDEMENTS [15-06-2024(online)].pdf	2024-06-15
13	202417045697-FORM 13 [15-06-2024(online)].pdf	2024-06-15
14	202417045697-AMMENDED DOCUMENTS [15-06-2024(online)].pdf	2024-06-15
15	202417045697-FORM 3 [19-09-2024(online)].pdf	2024-09-19