发明名称 |
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD FOR THE SAME |
摘要 |
PURPOSE: Grain-oriented electrical steel sheets and the manufacturing method thereof are provided to manufacture grain-oriented electrical steel sheets with low iron loss and high magnetic flux density by steadily forming second recrystallized grains, controlling first recrystallized grains to have a desired size distribution in an elevated temperature. CONSTITUTION: Grain-oriented electrical steel sheet manufacturing method comprises the following steps: manufacturing steel slabs; manufacturing steel sheets by re-heating and hot-rolling the steel slabs and then annealing the hot-rolled steel sheets or omitting the process; performing decarburization annealing for the steel sheets in 800-850°C and in an oxidizing gas atmosphere of 60-65°C; performing simultaneous decarbonization nitriding and annealing for the steel sheets in 850-900°C and in an oxidizing gas atmosphere of 65-72°C; and finally annealing the steel sheets after performing a first and a second cracking. |
申请公布号 |
KR20130071967(A) |
申请公布日期 |
2013.07.01 |
申请号 |
KR20110139479 |
申请日期 |
2011.12.21 |
申请人 |
POSCO |
发明人 |
KO, KYUNG JUN;PARK, JONG TAE;KIM, BYEONG GOO;BAEK, SEUNG MEEN |
分类号 |
C21D8/12;C21D9/46;C22C38/02;C22C38/60 |
主分类号 |
C21D8/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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