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Title:
NONORIENTED ELECTROMAGNETIC STEEL SHEET AND MANUFACTURING METHOD THEREFOR, HOT ROLLED SHEET FOR NONORIENTED ELECTROMAGNETIC STEEL SHEET AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2015224349
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide hot rolled sheet for nonoriented electromagnetic steel sheet using high Si-Al steel as a raw material and capable of suppressing brittleness fracture during cold rolling, method capable of easily providing a nonoriented electromagnetic steel sheet excellent in high frequency iron loss by using the hot rolled sheet and a nonoriented electromagnetic steel sheet excellent in punchability.SOLUTION: There is provided a nonoriented electromagnetic steel sheet consisting of a steel composition containing C:0.01% or less, Si:2.0 to 7.0%, Al:0.3 to 10.0%, Mn:0.2 to 2.0%, P:0.1% or less, S:0.005% or less and one or two kind of Ni:0.1 to 5% and Cu:0.1 to 3% and a size of DOregulated cluster existing in a heat rolled sheet for nonoriented electromagnetic steel sheet and/or the nonoriented electromagnetic steel sheet of 100 nm or less. These steel sheet are manufactured by holding at a temperature range of over 600°C and 700°C or less for 10 seconds and then cooling to 600°C or less at a cooling speed of 60°C/sec or more in a cooling process of hot rolled firing after hot rolling and/or a cooling process of finishing firing after cold rolling.

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Inventors:
WAKIZAKA TAKEAKI
SHIODA KOSAKU
SUGIYAMA MASAAKI
NAKAMURA SHUICHI
Application Number:
JP2014108036A
Publication Date:
December 14, 2015
Filing Date:
May 26, 2014
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP
International Classes:
C22C38/00; C21D8/12; C22C38/16; H01F1/16
Domestic Patent References:
JPS5569223A1980-05-24
JPH09176803A1997-07-08
JPS5569223A1980-05-24
JPH09176803A1997-07-08
JPS56108827A1981-08-28
JPS56108827A1981-08-28
Foreign References:
WO2013095006A12013-06-27
WO2013095006A12013-06-27
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Fukuchi Ritsuo
Nakamura Asayuki
Nagasaka Tomoyasu



 
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