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Non oriented electrical steel sheet, its manufacturing method, hot rolled sheet for non oriented electrical steel sheet and its manufacturing method
Non oriented electrical steel sheet, its manufacturing method, hot rolled sheet for non oriented electrical steel sheet and its manufacturing method
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机译：无取向电工钢板及其制造方法，无取向电工钢板用热轧板及其制造方法
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摘要
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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