公开(公告)号：US4437910A

公开(公告)日：1984-03-20

申请号：US267855

申请日：1981-05-28

申请人： Tadao Nozawa ,  Takaaki Yamamoto ,  Tadashi Nakayama ,  Fumio Matsumoto ,  Satohiro Hayami

发明人： Tadao Nozawa ,  Takaaki Yamamoto ,  Tadashi Nakayama ,  Fumio Matsumoto ,  Satohiro Hayami

IPC分类号： H01F1/16 ,  C21D8/12 ,  C21D9/46 ,  C21D9/52 ,  H01F1/04

CPC分类号： C21D9/52 ,  C21D8/1272 ,  C21D2281/02

摘要： In the secondary recrystallization of a grain-oriented silicon steel sheet, a specific temperature gradient is generated, thereby developing the secondary recrystallized grains having a good (110) [001] orientation and increasing the magnetic flux density higher than that previousy obtained. The temperature gradient is established at the boundary region between the primary and secondary recrystallized regions, with the result that highly oriented (110) [001] secondary recrystallization nuclei preferentially are caused to develop.

摘要翻译： 在晶粒取向硅钢板的二次再结晶中，产生特定的温度梯度，从而显现出具有良好（110）[001]取向的二次再结晶晶粒，并且使磁通密度增加，高于之前获得的。 在一次和二次再结晶区域之间的边界区域建立温度梯度，结果是优先引起高取向（110）[001]二次再结晶核。

公开(公告)号：US4592789A

公开(公告)日：1986-06-03

申请号：US411001

申请日：1982-08-24

申请人： Yakichiro Kawamo ,  Yozo Suga ,  Tadao Nozawa ,  Tadashi Nakayama

发明人： Yakichiro Kawamo ,  Yozo Suga ,  Tadao Nozawa ,  Tadashi Nakayama

IPC分类号： H01F1/16 ,  C21D8/12 ,  H01F1/04

CPC分类号： C21D8/1272

摘要： In conventional processes for producing a grain-oriented electromagnetic steel strip or sheet, the carbon and silicon content of the starting material is such that .alpha.-.gamma. transformation takes place, said transformation formerly being belived to play an important role in, for example, the formation of AlN. Recently, attempts have been made to reduce the carbon content so as to simplify decarburization-annealing, but these attempts have not been successful.In the present invention, (1) an extremely low carbon content (C.ltoreq.0.02%) and an extremely low sulfur content (S.ltoreq.0.015%), as well as a low heating temperature of the starting material, and (2) a temperature gradient of at least 2.degree. C. per centimeter, which is generated parallel to the sheet surface and under which the growth of secondary recrystallized grains is completed, are combined. As a result of such combination, the following advantages are attained: (1) secondary recrystallization is attained without .alpha.-.gamma. transformation taking place; (2) a high magnetic flux density is attained; (3) a continuous-casting machine can be directly combined with a continuous hot-rolling mill; (4) decarburization-annealing can be simplified; and (5) no molten slag is formed during heating of a steel slab.

摘要翻译： 在用于制造晶粒取向的电磁钢带或片材的常规方法中，起始材料的碳和硅含量使得发生α-γ转化，所述转变以前被认为在例如 形成AlN。 近来，已经尝试减少碳含量以简化脱碳退火，但是这些尝试并不成功。 在本发明中，（1）极低的碳含量（C <= 0.02％）和极低的硫含量（S <= 0.015％）以及起始材料的低加热温度和（ 2）结合平行于片材表面并在其下完成二次再结晶晶粒的生长的每厘米至少2℃的温度梯度。 作为这种组合的结果，可获得以下优点：（1）在没有发生α-γ转化的情况下实现二次再结晶; （2）获得高磁通密度; （3）连铸机可直接与连续式热轧机组合; （4）可以简化脱碳退火; （5）钢板加热时不会形成熔渣。

公开(公告)号：US5415703A

公开(公告)日：1995-05-16

申请号：US022412

申请日：1993-02-16

申请人： Yoshiyuki Ushigami ,  Norito Abe ,  Sadami Kousaka ,  Tadao Nozawa ,  Osamu Honjo ,  Tadashi Nakayama

发明人： Yoshiyuki Ushigami ,  Norito Abe ,  Sadami Kousaka ,  Tadao Nozawa ,  Osamu Honjo ,  Tadashi Nakayama

IPC分类号： C21D8/12 ,  H01F1/147

CPC分类号： H01F1/14775 ,  C21D8/1233 ,  C21D8/1244

摘要： A very thin electrical steel strip having a thickness not exceeding 150 microns, an average grain diameter not exceeding 1.0 mm, a high degree of {110} grain orientation, a high normalized magnetic flux density as expressed by a B.sub.8 /B.sub.s value which is greater than 0.9, and a low core loss not exceeding 50% of the core loss of any conventional product.It is produced from a starting material consisting of a grain-oriented electrical steel strip containing not more than 8% silicon, the balance thereof substantially being iron, and having a high degree of {110} grain orientation, a normalized magnetic flux density as expressed by a B.sub.8 /B.sub.s value which is greater than 0.9, an average grain diameter of at least 20 mm in the rolling direction and an average grain diameter of at least 40 mm in the direction perpendicular to the rolling direction. The material is cold rolled with a reduction of 60 to 80% to a final thickness not exceeding 150 microns, and the cold rolled material is annealed for primary recrystallization. The use of a starting material further containing 0.005 to 0.30% of one or both of tin and antimony yields a product of still improved properties.

摘要翻译： 厚度不超过150微米，平均粒径不超过1.0毫米，{110} <001>晶粒取向高度的非常薄的电工钢带，由B8 / Bs值表示的高归一化磁通密度 其大于0.9，并且低铁损不超过任何常规产品的铁损的50％。 由含有不超过8％硅的晶粒取向电工钢板，其余基本上为铁，并具有高度{110} <001>晶粒取向的起始材料制成，归一化磁通量 由B8 / Bs值大于0.9表示，在轧制方向的平均粒径至少为20mm，平均粒径在与轧制方向垂直的方向上至少为40mm。 将材料冷轧至60-80％，最终厚度不超过150微米，冷轧材料进行一次再结晶退火。 使用进一步含有0.005〜0.30％的锡和锑中的一种或两种的起始材料得到仍具有改进性能的产品。

公开(公告)号：US5026439A

公开(公告)日：1991-06-25

申请号：US596857

申请日：1990-10-12

申请人： Masaki Tanaka ,  Norito Abe ,  Masao Yabumoto ,  Yoshiyuki Ushigami ,  Tadao Nozawa

发明人： Masaki Tanaka ,  Norito Abe ,  Masao Yabumoto ,  Yoshiyuki Ushigami ,  Tadao Nozawa

IPC分类号： C21D8/12 ,  C21D9/00 ,  C21D9/52

CPC分类号： C21D8/1294 ,  C21D9/52

摘要： The present invention provides a wound core having a low core loss and not susceptible to a disappearance of the core loss lowering effect due to a magnetic domain refining even when stress-relief annealing is conducted after fabrication of a steel strip into a wound core, through a process which comprises, fabricating a very thin silicon steel strip comprising by 6.5% weight or less of silicon with the balance consisting essentially of iron and having a sheet thickness of 100 .mu.m or less and a magnetic flux density (B.sub.8 value) of 1.80T or more into a wound core, subjecting the wound core to stress-relief annealing, unwinding the very thin silicon steel strip from the core, introducing into the very thin silicon steel strip a linear or dotted local strain in a direction at an angle of 45.degree. to 90.degree. to the rolling direction of the thin strip, and rewinding the thin strip onto the core.

公开(公告)号：US3932236A

公开(公告)日：1976-01-13

申请号：US434449

申请日：1974-01-18

申请人： Toshiya Wada ,  Tadao Nozawa ,  Toshihiko Takata

发明人： Toshiya Wada ,  Tadao Nozawa ,  Toshihiko Takata

IPC分类号： H01F1/16 ,  C21D8/12 ,  H01F1/18 ,  H01F1/04

CPC分类号： C21D8/1277

摘要： A method for producing a grain-oriented electrical steel sheet showing super low watt loss, comprising making a silicon steel ingot containing 2.5 to 4.0% of Si, subjecting the ingot treatments including hot rolling, annealing and at least one cold rolling to obtain a final size, subjecting the steel to decarburization annealing and a finishing annealing which completes secondary recrystallization, subjecting the steel to remove surface product and then subjecting the steel to chemical polishing or electrolytic polishing to polish the steel surface to mirror condition.

摘要翻译： 一种显示超低瓦特损耗的方向性电磁钢板的制造方法，其特征在于，制造含有2.5〜4.0％的Si的硅钢锭，进行包括热轧，退火和至少一次冷轧的锭处理， 大小，对钢进行脱碳退火和完成二次再结晶的精加工退火，对钢进行表面处理，然后对钢进行化学抛光或电解抛光以将钢表面抛光至镜面状态。