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1. 发明申请

US20090032142A1 Method of Producing Grain-Oriented Electrical Steel Sheet Very Excellent in Magnetic Properties 有权
标题翻译：生产面向电磁钢板的方法在磁性方面非常优秀
公开(公告)号：US20090032142A1
公开(公告)日：2009-02-05
申请号：US12224709
申请日：2007-01-12
申请人： Tomoji Kumano , Shyuichi Yamazaki , Osamu Tanaka
发明人： Tomoji Kumano , Shyuichi Yamazaki , Osamu Tanaka
IPC分类号： C21D8/00
CPC分类号： C23C8/02 , B21B3/02 , C21D8/12 , C21D8/1261 , C21D8/1272 , C21D9/46 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/20 , C23C8/26 , C23C8/80 , H01F1/14775
摘要： The invention provides a method of producing a grain-oriented electrical steel sheet of the complete solid solution nitrided type that is good in glass film formation and excellent in magnetic properties, which method comprises: C: 0.025 to 0.09%, hot-rolling the steel slab containing Si: 2.5 to 4.0% and acid-soluble Al into a hot-rolled steel strip; controlling the rate at which N contained in the hot-rolled steel strip is precipitated as AlN to a precipitation rate of 20% or less; conducting hot-rolled strip annealing and cold rolling conducting decarburization-annealing combined with primary recrystallization by during the former part of the process in an atmosphere whose PH2O/PH2 is 0.30 to 0.70 and then during the latter part thereof in an atmosphere whose PH2O/PH2 is 0.20 or less, thereby making the circular equivalent average grain diameter of the primary recrystallization grains 7 μm to less than 18 μm; nitriding the strip as it travels in a mixed gas of hydrogen, nitrogen and ammonia; controlling the steel strip oxygen concentration before secondary recrystallization annealing calculated based on strip thickness of 0.30 mm (oxygen content: So) to 450 ppm to 700 ppm inclusive; applying a coat of annealing separator; and then conducting secondary recrystallization annealing in an atmosphere that, while the temperature at the hottest coil outer periphery point is between room temperature and 950° C., is controlled to a nitrogen atmosphere containing oxygen: 25 to 75% wherein the balance is hydrogen and PH2O/PH2 is 0.01 to 0.15.
摘要翻译：本发明提供了一种制备完全固溶氮化型的方向性电磁钢板的方法，该方法具有良好的玻璃成膜性和优异的磁性能，该方法包括：C：0.025〜0.09％，热轧钢含有Si：2.5〜4.0％的板坯和酸溶性Al成为热轧带钢; 控制热轧钢带中所含的N作为AlN析出的析出速度为20％以下; 在前一部分工艺中，在PH2O / PH2为0.30〜0.70的气氛中进行热轧带退火和冷轧进行脱碳退火，再结合一次再结晶，然后在其后半部分，在PH2O / PH2 为0.20以下，从而使一次再结晶晶粒的圆形当量平均粒径7μm至小于18μm; 当条带在氢，氮和氨的混合气体中流动时氮化; 基于条带厚度为0.30mm（氧含量：So）计算出的二次再结晶退火前的钢带氧浓度为450ppm〜700ppm，涂一层退火分离器; 然后在最热线圈外周点的温度在室温〜950℃之间的气氛中进行二次再结晶退火，控制在含有氧的氮气氛中：25〜75％，其中余量为氢， PH2O / PH2为0.01〜0.15。

2. 发明授权

US07833360B2 Method of producing grain-oriented electrical steel sheet very excellent in magnetic properties 有权
标题翻译：制造磁特性优异的晶粒取向电工钢板的方法
公开(公告)号：US07833360B2
公开(公告)日：2010-11-16
申请号：US12224709
申请日：2007-01-12
申请人： Tomoji Kumano , Shyuichi Yamazaki , Osamu Tanaka
发明人： Tomoji Kumano , Shyuichi Yamazaki , Osamu Tanaka
IPC分类号： H01F1/147
CPC分类号： C23C8/02 , B21B3/02 , C21D8/12 , C21D8/1261 , C21D8/1272 , C21D9/46 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/20 , C23C8/26 , C23C8/80 , H01F1/14775
摘要： The invention provides a method of producing a grain-oriented electrical steel sheet of the complete solid solution nitrided type that is good in glass film formation and excellent in magnetic properties, which method comprises: C: 0.025 to 0.09%, hot-rolling the steel slab containing Si: 2.5 to 4.0% and acid-soluble Al into a hot-rolled steel strip; controlling the rate at which N contained in the hot-rolled steel strip is precipitated as AlN to a precipitation rate of 20% or less; conducting hot-rolled strip annealing and cold rolling conducting decarburization-annealing combined with primary recrystallization by during the former part of the process in an atmosphere whose PH2O/PH2 is 0.30 to 0.70 and then during the latter part thereof in an atmosphere whose PH2O/PH2 is 0.20 or less, thereby making the circular equivalent average grain diameter of the primary recrystallization grains 7 μm to less than 18 μm; nitriding the strip as it travels in a mixed gas of hydrogen, nitrogen and ammonia; controlling the steel strip oxygen concentration before secondary recrystallization annealing calculated based on strip thickness of 0.30 mm (oxygen content: So) to 450 ppm to 700 ppm inclusive; applying a coat of annealing separator; and then conducting secondary recrystallization annealing in an atmosphere that, while the temperature at the hottest coil outer periphery point is between room temperature and 950° C., is controlled to a nitrogen atmosphere containing oxygen: 25 to 75% wherein the balance is hydrogen and PH2O/PH2 is 0.01 to 0.15.
摘要翻译：本发明提供了一种制备完全固溶氮化型的方向性电磁钢板的方法，该方法具有良好的玻璃成膜性和优异的磁性能，该方法包括：C：0.025〜0.09％，热轧钢含有Si：2.5〜4.0％的板坯和酸溶性Al成为热轧带钢; 控制热轧钢带中所含的N作为AlN析出的析出速度为20％以下; 在前一部分工艺中，在PH2O / PH2为0.30〜0.70的气氛中进行热轧带退火和冷轧进行脱碳退火，再结合一次再结晶，然后在其后半部分，在PH2O / PH2 为0.20以下，从而使一次再结晶晶粒的圆周当量平均粒径为7μm〜小于18μm; 当条带在氢，氮和氨的混合气体中流动时氮化; 基于条带厚度为0.30mm（氧含量：So）计算出的二次再结晶退火前的钢带氧浓度为450ppm〜700ppm，涂一层退火分离器; 然后在最热线圈外周点的温度在室温〜950℃之间的气氛中进行二次再结晶退火，控制在含有氧的氮气氛中：25〜75％，其中余量为氢， PH2O / PH2为0.01〜0.15。

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