| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a sufficient precipitation nitriding type high magnetic flux density grain oriented silicon steel sheet usable as an iron core for a transformer or the like. SOLUTION: In the method for producing a sufficient precipitation nitriding type high magnetic flux density grain oriented silicon steel sheet, annealing conditions in a hot rolled steel strip prescribed by effective acid soluble Al (AlNR) are made into one stage at the following maximum and minimum temperatures to improve grading properties, while magnetic flux density is secured at a high level, and the characteristics of high Si are exhibited: Tmax.(°C)=15/22×AlNR+1000 (<1120°C), and Tmin.(°C)=15/22×AlNR+900 (≥925°C); wherein AlNR (ppm)=acid soluble Al-27/14(N-14/48Ti). COPYRIGHT: (C)2008,JPO&INPIT
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