NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
C21D-008/12
H01F-001/18
출원번호
17440646
(2020-04-17)
공개번호
20220316022
(2022-10-06)
국제출원번호
PCT/JP2020/016809
(2020-04-17)
발명자
/ 주소
FUJII, Hiroyasu
MAKI, Jun
TAKEDA, Kazutoshi
MIMURA, Hiroyuki
KANTO, Yusuke
YAMAZAKI, Shuichi
출원인 / 주소
NIPPON STEEL CORPORATION
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
A non-oriented electrical steel sheet according to one embodiment of this invention includes a base metal steel sheet and a composite coating film composed of a Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet. A molar r
A non-oriented electrical steel sheet according to one embodiment of this invention includes a base metal steel sheet and a composite coating film composed of a Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet. A molar ratio of Zn to all metal components in the composite coating film is 10 mol % or more, and after the non-oriented electrical steel sheet is boiled for 20 minutes in boiled distilled water, an amount of soluble Zn in the distilled water is 1.0 mg/m2 or more. The method for determining the amount of soluble Zn is in accordance with JIS K 0102: 2016 “Testing Methods for Industrial Wastewater”, 53.3 “ICP Emission Spectroscopy”.
대표청구항▼
1. A non-oriented electrical steel sheet, comprising: a base metal steel sheet, anda composite coating film composed of a Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet,wherein:a molar ratio of Zn to all metal componen
1. A non-oriented electrical steel sheet, comprising: a base metal steel sheet, anda composite coating film composed of a Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet,wherein:a molar ratio of Zn to all metal components in the composite coating film is 10 mol % or more, andafter boiling the non-oriented electrical steel sheet for 20 minutes in boiled distilled water, an amount of soluble Zn in the distilled water is 1.0 mg/m2 or more;where, a method for determining the amount of soluble Zn is in accordance with JIS K 0102: 2016 “Testing Methods for Industrial Wastewater”, 53.3 “ICP Emission Spectroscopy”. 2. The non-oriented electrical steel sheet according to claim 1, wherein: the metal components of the composite coating film further include one or more of Al, Mg and Ca. 3. The non-oriented electrical steel sheet according to claim 1, wherein: the organic resin includes one or more of an acrylic resin, a styrene resin, an acrylic-styrene resin, an epoxy resin, a polyester resin, a phenol resin and a urethane resin. 4. A method for producing a non-oriented electrical steel sheet according to claim 1, comprising: a step of applying a coating solution to a surface of a base metal steel sheet, the coating solution containing a Zn-containing phosphate in which a molar ratio of Zn to all metal components is 10 mol % or more and an organic resin, andthereafter, a step of forming the composite coating film on the base metal steel sheet by baking the coating solution under an atmosphere with a dew point of +30° C. or more. 5. The method for producing a non-oriented electrical steel sheet according to claim 4, wherein: the coating solution further contains one or more of Al, Mg and Ca. 6. The method for producing a non-oriented electrical steel sheet according to claim 4, wherein: the organic resin is one or more of an acrylic resin, a styrene resin, an acrylic-styrene resin, an epoxy resin, a polyester resin, a phenol resin and a urethane resin. 7. The method for producing a non-oriented electrical steel sheet according to claim 4, wherein: an end-point temperature when baking the coating solution is within a range of 200 to 450° C. 8. A non-oriented electrical steel sheet, comprising: a base metal steel sheet, anda composite coating film comprises a Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet,wherein:a molar ratio of Zn to all metal components in the composite coating film is 10 mol % or more, andafter boiling the non-oriented electrical steel sheet for 20 minutes in boiled distilled water, an amount of soluble Zn in the distilled water is 1.0 mg/m2 or more;where, a method for determining the amount of soluble Zn is in accordance with JIS K 0102: 2016 “Testing Methods for Industrial Wastewater”, 53.3 “ICP Emission Spectroscopy”.
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