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1. WO2020111640 - NON-ORIENTED ELECTRICAL STEEL SHEET HAVING LOW IRON LOSS AND EXCELLENT SURFACE QUALITY, AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2020/111640
Publication Date 04.06.2020
International Application No. PCT/KR2019/015937
International Filing Date 20.11.2019
IPC
C22C 38/02 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/06 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/14 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
14containing titanium or zirconium
C22C 38/12 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
12containing tungsten, tantalum, molybdenum, vanadium or niobium
CPC
B21B 1/46
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
BROLLING OF METAL
1Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section
46for rolling metal immediately subsequent to continuous casting
B21B 3/00
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
BROLLING OF METAL
3Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
C21D 8/12
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
12during manufacturing of articles with special electromagnetic properties
C21D 9/00
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
C22C 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
Applicants
  • 주식회사 포스코 POSCO [KR]/[KR]
Inventors
  • 공종판 KONG, Jong-Pan
  • 차경세 CHA, Kyung-Se
  • 이세일 LEE, Se-Il
Agents
  • 특허법인 씨엔에스 C&S PATENT AND LAW OFFICE
Priority Data
10-2018-015070829.11.2018KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) NON-ORIENTED ELECTRICAL STEEL SHEET HAVING LOW IRON LOSS AND EXCELLENT SURFACE QUALITY, AND MANUFACTURING METHOD THEREFOR
(FR) TÔLE D'ACIER ÉLECTRIQUE NON ORIENTÉE AYANT UNE FAIBLE PERTE DANS LE FER ET UNE EXCELLENTE QUALITÉ DE SURFACE, ET SON PROCÉDÉ DE FABRICATION
(KO) 낮은 철손 및 우수한 표면품질을 갖는 무방향성 전기강판 및 그 제조방법
Abstract
(EN)
One embodiment of the present invention provides a non-oriented electrical steel sheet having low iron loss and excellent surface quality, the non-oriented electrical steel sheet comprising, by wt%, 0.0005-0.0060% of C, 2.6-3.8% of Si, 0.05-2.0% of Mn, 0.05-2.0% of Al, 0.005-0.20% of Sn, 0.002-0.30% of P, 0.0002-0.005% of S, 0.0002-0.01% of Ti, 0.0002-0.01% of Nb, 0.0002-0.01% of V, 0.0005-0.006% of N, and the balance of Fe and the other inevitable impurities, meeting the following relations 1-5, and having 30-80 area% of an un-recrystallized region structure. [Relation 1] 3.5 ≤ [Si+Al+(Mn+Sn)/2+5P] ≤ 6.0 [Relation 2] 1.0 ≤ [(Ti/48+Nb/93+V/51)(C/12+N/14)]×108≤ 5.0 [Relation 3] 0.85 ≤ [Si+Al+(Mn+Sn)/2+5P]/[(Ti/48+Nb/93+V/51)(C/12+N/14)×108] ≤ 4.5 [Relation 4] 3.8 ≤ [Si+100P] ≤ 8.0 [Relation 5] 0.55 ≤ [Si+Al+(Mn+Sn)/2+5P]/[Si+100P] ≤ 1.35 (In relations 1-5, the amount of Si, Al, Mn, Sn, P, Ti, Nb, V, C and N is in wt%.)
(FR)
Un mode de réalisation de la présente invention concerne une tôle d'acier électrique non orientée ayant une faible perte dans le fer et une excellente qualité de surface, la tôle d'acier électrique non orientée comprenant, en % en poids, 0,0005 à 0,0060 % de C, 2,6 à 3,8 % de Si, 0,05 à 2,0 % de Mn, 0,05 à 2,0 % d'Al, 0,005 à 0,20 % de Sn, 0,002 à 0,30 % de P, 0,0002 à 0,005 % de S, 0,0002 à 0,01 % de Ti, 0,0002 à 0,01 % de Nb, 0,0002 à 0,01 % de V, 0,0005 à 0,006 % de N, et le reste de Fe et d'autres impuretés inévitables, satisfaisant ainsi les relations suivantes 1 à 5, et ayant 30 à 80 % en surface d'une structure de région non recristallisée. [Relation 1] 3,5 ≤ [Si+Al+(Mn+Sn)/2+5P] ≤ 6,0 [Relation 2] 1,0 ≤ [(Ti/48+Nb/93+V/51)(C/12+N/14)]×108≤ 5,0 [Relation 3] 0,85 ≤ [Si+Al+(Mn+Sn)/2+5P]/[(Ti/48+Nb/93+V/51)(C/12+N/14)×108] ≤ 4,5 [Relation 4] 3,8 ≤ [Si+100P] ≤ 8,0 [Relation 5] 0,55 ≤ [Si+Al+(Mn+Sn)/2+5P]/[Si+100P] ≤ 1,35 (Dans les relations 1 à 5, la quantité de Si, Al, Mn, Sn, P, Ti, Nb, V, C et N est exprimée en % en poids.)
(KO)
본 발명의 일 실시형태는 중량%로, C: 0.0005~0.0060%, Si: 2.6∼3.8%, Mn: 0.05~2.0%, Al: 0.05~2.0%, Sn: 0.005~0.20%, P: 0.002~0.30%, S: 0.0002~0.005%, Ti: 0.0002~0.01%, Nb: 0.0002~0.01%, V: 0.0002~0.01%, N: 0.0005~0.006%, 잔부 Fe 및 기타 불가피한 불순물을 포함하고, 하기 관계식 1 내지 5를 만족하며, 미재결정 조직이 30~80면적%인 낮은 철손 및 우수한 표면품질을 갖는 무방향성 열연 전기강판을 제공한다. [관계식 1] 3.5 ≤ [Si+Al+(Mn+Sn)/2+5P] ≤ 6.0 [관계식 2] 1.0 ≤ [(Ti/48+Nb/93+V/51)(C/12+N/14)]×10 8 ≤ 5.0 [관계식 3] 0.85 ≤ [Si+Al+(Mn+Sn)/2+5P]/[(Ti/48+Nb/93+V/51)(C/12+N/14)×10 8] ≤ 4.5 [관계식 4] 3.8 ≤ [Si+100P] ≤ 8.0 [관계식 5] 0.55 ≤ [Si+Al+(Mn+Sn)/2+5P]/[Si+100P] ≤ 1.35 (상기 관계식 1 내지 5에서 Si, Al, Mn, Sn, P, Ti, Nb, V, C 및 N의 함량은 중량%임.)
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