NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
C21D-009/46
C22C-038/18
C22C-038/16
C22C-038/08
C22C-038/06
C22C-038/04
C22C-038/34
C22C-038/00
C21D-008/12
C21D-008/00
C21D-006/00
C23C-010/08
H01F-001/147
출원번호
17630506
(2020-04-28)
공개번호
20220243298
(2022-08-04)
우선권정보
JP-2019-141336 (2019-07-31)
국제출원번호
PCT/JP2020/018201
(2020-04-28)
발명자
/ 주소
YOSHIZAKI, Souichiro
MIYAMOTO, Yukino
ZAIZEN, Yoshiaki
SENDA, Kunihiro
출원인 / 주소
JFE STEEL CORPORATION
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
Provided is a non-oriented electrical steel sheet having excellent adhesion with an insulating coating even if the thickness of the insulating coating is reduced. The non-oriented electrical steel sheet of the present disclosure has an insulating coating on at least one surface of the steel sheet, w
Provided is a non-oriented electrical steel sheet having excellent adhesion with an insulating coating even if the thickness of the insulating coating is reduced. The non-oriented electrical steel sheet of the present disclosure has an insulating coating on at least one surface of the steel sheet, where the insulating coating has a P-concentrated layer on both a surface side and an interface side with a steel substrate, and a P concentration of the P-concentrated layer is higher than a P concentration in the steel substrate.
대표청구항▼
1-14. (canceled) 15. A non-oriented electrical steel sheet, which is an electrical steel sheet having an insulating coating on at least one surface of the steel sheet, wherein the insulating coating has a P-concentrated layer on both a surface side and an interface side with a steel substrate, and a
1-14. (canceled) 15. A non-oriented electrical steel sheet, which is an electrical steel sheet having an insulating coating on at least one surface of the steel sheet, wherein the insulating coating has a P-concentrated layer on both a surface side and an interface side with a steel substrate, and a P concentration of the P-concentrated layer is higher than a P concentration in the steel substrate. 16. The non-oriented electrical steel sheet according to claim 15, wherein the steel sheet comprises a chemical composition containing, in mass %, C: less than 0.010%,Si: 1.5% or more and 10.0% or less,Al: 0.001% or more and 2.0% or less, andMn: 0.005% or more and 1.0% or less, with the balance being Fe and inevitable impurities. 17. The non-oriented electrical steel sheet according to claim 16, wherein the steel sheet further contains, in mass %, P: 0.005% or more and 0.20% or less. 18. The non-oriented electrical steel sheet according to claim 16, wherein the chemical composition further contains, in mass %, at least one selected from the group consisting of Sn: 0.002% or more and 0.10% or less,Mo: 0.005% or more and 0.10% or less,Sb: 0.005% or more and 0.30% or less,Cu: 0.01% or more and 0.50% or less,Cr: 0.01% or more and 0.50% or less, andNi: 0.010% or more and 1.0% or less. 19. The non-oriented electrical steel sheet according to claim 17, wherein the chemical composition further contains, in mass %, at least one selected from the group consisting of Sn: 0.002% or more and 0.10% or less,Mo: 0.005% or more and 0.10% or less,Sb: 0.005% or more and 0.30% or less,Cu: 0.01% or more and 0.50% or less,Cr: 0.01% or more and 0.50% or less, andNi: 0.010% or more and 1.0% or less. 20. The non-oriented electrical steel sheet according to claim 15, wherein the insulating coating has an Fe-concentrated layer on the interface side with the steel substrate. 21. The non-oriented electrical steel sheet according to claim 15, wherein the steel sheet has a thickness of 0.20 mm or less. 22. The non-oriented electrical steel sheet according to claim 15, wherein the steel sheet has a concentration gradient in which a Si concentration decreases from a surface side of the steel sheet toward a center side of the steel sheet, and difference in the Si concentration between a surface layer of the steel sheet and a center layer of the steel sheet in the concentration gradient is 1.0 mass % to 5.0 mass %. 23. A method for manufacturing a non-oriented electrical steel sheet, which is a method for manufacturing the electrical steel sheet according to claim 15, comprising subjecting a slab for the electrical steel sheet to hot rolling, cold rolling, and then final annealing to obtain a final annealed sheet, and forming an insulating coating on a surface of the final annealed sheet, wherein the cold rolling is performed using a rolling oil containing 1% or more of a phosphoric ester-type emulsifier, andthe insulating coating is formed by applying a solution containing one part by mass or more of a phosphoric acid compound. 24. A method for manufacturing a non-oriented electrical steel sheet, which is a method for manufacturing the electrical steel sheet according to claim 15, comprising subjecting a slab for the electrical steel sheet to hot rolling, cold rolling, and then final annealing to obtain a final annealed sheet, and forming an insulating coating on a surface of the final annealed sheet, wherein after the cold rolling and before the final annealing, an aqueous solution containing 5 parts by mass or more of a phosphoric acid compound is applied on a surface of the steel sheet that has undergone the cold rolling, and the aqueous solution is dried, andthe insulating coating is formed by applying a solution containing one part by mass or more of a phosphoric acid compound. 25. A method for manufacturing a non-oriented electrical steel sheet, which is a method for manufacturing the electrical steel sheet according to claim 15, comprising subjecting a slab for the electrical steel sheet to hot rolling, cold rolling, and then final annealing to obtain a final annealed sheet, and forming an insulating coating on a surface of the final annealed sheet, wherein the cold rolling is performed using a rolling oil containing 1% or more of a phosphoric ester-type emulsifier,after the cold rolling and before the final annealing, an aqueous solution containing 5 parts by mass or more of a phosphoric acid compound is applied on a surface of the steel sheet that has undergone the cold rolling, and the aqueous solution is dried, andthe insulating coating is formed by applying a solution containing one part by mass or more of a phosphoric acid compound. 26. A method for manufacturing a non-oriented electrical steel sheet, which is a method for manufacturing the electrical steel sheet according to claim 15, comprising subjecting a slab for the electrical steel sheet to hot rolling, cold rolling, and then final annealing to obtain a final annealed sheet, and forming an insulating coating on a surface of the final annealed sheet, wherein the slab contains 0.005 mass % to 0.20 mass % of P, and an annealing temperature in the final annealing is set to 1100° C. or higher, andthe insulating coating is formed by applying a solution containing one part by mass or more of a phosphoric acid compound. 27. A method for manufacturing a non-oriented electrical steel sheet, wherein in the method for manufacturing an electrical steel sheet according to claim 26, the cold rolling is performed using a rolling oil containing 1% or more of a phosphoric ester-type emulsifier. 28. A method for manufacturing a non-oriented electrical steel sheet, wherein in the method for manufacturing an electrical steel sheet according to claim 26, after the cold rolling and before the final annealing, an aqueous solution containing 5 parts by mass or more of a phosphoric acid compound is applied on a surface of the steel sheet that has undergone the cold rolling, and the aqueous solution is dried. 29. A method for manufacturing a non-oriented electrical steel sheet, wherein in the method for manufacturing an electrical steel sheet according to claim 27, after the cold rolling and before the final annealing, an aqueous solution containing 5 parts by mass or more of a phosphoric acid compound is applied on a surface of the steel sheet that has undergone the cold rolling, and the aqueous solution is dried. 30. A method for manufacturing a non-oriented electrical steel sheet according to claim 23, comprising subjecting a slab for the electrical steel sheet to hot rolling, cold rolling, and then final annealing to obtain a final annealed sheet, and forming an insulating coating on a surface of the final annealed sheet, whereina siliconizing treatment is performed after the final annealing, or the final annealing is final annealing that also serves as a siliconizing treatment. 31. A method for manufacturing a non-oriented electrical steel sheet according to claim 24, comprising subjecting a slab for the electrical steel sheet to hot rolling, cold rolling, and then final annealing to obtain a final annealed sheet, and forming an insulating coating on a surface of the final annealed sheet, whereina siliconizing treatment is performed after the final annealing, or the final annealing is final annealing that also serves as a siliconizing treatment. 32. A method for manufacturing a non-oriented electrical steel sheet according to claim 26, comprising subjecting a slab for the electrical steel sheet to hot rolling, cold rolling, and then final annealing to obtain a final annealed sheet, and forming an insulating coating on a surface of the final annealed sheet, whereina siliconizing treatment is performed after the final annealing, or the final annealing is final annealing that also serves as a siliconizing treatment.
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