发明名称 |
PROCESS FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET |
摘要 |
A slab having a desired composition containing Sn: 0.02% to 0.20% and P: 0.010% to 0.080% is used. A finishing temperature of hot rolling is 950°C or lower, hot-rolled sheet annealing is performed at 800°C to 1200°C, a cooling rate from 750°C to 300°C in the hot-rolled sheet annealing is 10°C/second to 300°C/second, and a reduction ratio of cold rolling is 85% or more. A nitridation treatment in which an N content of a decarburization-annealed steel sheet is increased is performed between beginning of decarburization annealing and occurrence of secondary recrystallization in finish annealing. |
申请公布号 |
EP2876173(A4) |
申请公布日期 |
2016.02.24 |
申请号 |
EP20120881480 |
申请日期 |
2012.07.20 |
申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
MURAKAMI, KENICHI;USHIGAMI, YOSHIYUKI;TAKAHASHI, FUMIAKI |
分类号 |
C21D8/12;C22C38/00;C22C38/06;C22C38/60;H01F1/16 |
主分类号 |
C21D8/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|