Title:
無方向性電磁鋼板とその製造方法
Document Type and Number:
Japanese Patent JP6738047
Kind Code:
B2
Abstract:
When a non-oriented electrical steel sheet is produced by hot rolling a steel slab containing, by mass%, C: not more than 0.0050, Si: 3.2 to 4.5%, Mn: 0.1 to 2.0%, P: not more than 0.020%, As: not more than 0.0030%, Sn+Sb: 0.005 to 0.10%, and one or two elements selected from Mo and W by a content ranging from 0.0020 to 0.10% in total, optionally conducting hot band annealing, subjecting the resultant steel sheet to one cold rolling or two or more cold rollings including an intermediate annealing therebetween to achieve a final sheet thickness, and then subjecting the cold rolled sheet to finish annealing, a N2content in an atmosphere in the finish annealing is set to not more than 20 vol%, and preferably, rolling reduction in a first pass of rough rolling of the hot rolling is set to not more than 25%, and an average strain rate in the first pass is set to not more than 4 /sec, which allows the cold rolling property to improve with no degradation in the magnetic property and no decrease in the productivity.
Inventors:
Tomoyuki Okubo
Zaizen Yoshiaki
Masanori Uesaka
Yoshihiko Oda
Zaizen Yoshiaki
Masanori Uesaka
Yoshihiko Oda
Application Number:
JP2017107588A
Publication Date:
August 12, 2020
Filing Date:
May 31, 2017
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C22C38/00; C21D8/12; C22C38/60; H01F1/147
Domestic Patent References:
| JP2016151063A | ||||
| JP11181577A |
Foreign References:
| WO2014129106A1 | ||||
| WO2014142149A1 | ||||
| WO2013046661A1 | ||||
| WO2016002904A1 | ||||
| WO2014030512A1 | ||||
| KR1020160078081A |
Attorney, Agent or Firm:
Ginza Marronnier Patent Office