PURPOSE: To stably obtain extremely high magnetic flux density in a grain- oriented silicon steel sheet contg. AlN. ;CONSTITUTION: As the subject hot rolled sheet, a sheet contg. Al as inhibitor components is used. By final finish annealing, a coarse-grained region is formed on the surface layer of the steel sheet before the start of the prior growth of the crystal grains in the Goss orientation, and the average grain size of the crystal grains in the same coarse-grained region is regulated to 20 to 50μm and the depth of the coarse-grained region from the surface layer is regulated to the range of 1/10 to 1/4 of the sheet thickness. The coating weight of oxygen in the steel sheet after decarburizing annealing is regulated to 0.6 to 1.5g/m2 for both sides of the steel sheet. Thus, the steel sheet stable in secondary crystals can be obtd.;COPYRIGHT: (C)1996,JPO
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机译：目的：为了在连续的晶粒取向硅钢板中稳定地获得极高的磁通密度。 AlN。 ;组成：作为主题的热轧薄板，连续一块。使用Al作为抑制剂组分。通过最终的最终退火，在戈斯取向的晶粒先行生长之前，在钢板的表面层上形成了一个粗晶粒区域，并且在相同的粗晶粒中晶粒的平均晶粒尺寸颗粒区域的厚度被调节为20至50μm，并且从表面层起的粗颗粒区域的深度被调节为片厚度的1/10至1/4。脱碳退火后的钢板两侧的氧的被覆量为0.6〜1.5g / m 2 。因此，可以得到在二次晶体中稳定的钢板。版权所有：（C）1996，日本特许厅
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