公开(公告)号：US5782998A

公开(公告)日：1998-07-21

申请号：US175430

申请日：1994-01-07

申请人： Yoshiyuki Ushigami ,  Takeo Nagashima ,  Shuichi Yamazaki ,  Hiroyasu Fujii ,  Yozo Suga ,  Tadashi Nakayama ,  Katsuro Kuroki ,  Yosuke Kurosaki

发明人： Yoshiyuki Ushigami ,  Takeo Nagashima ,  Shuichi Yamazaki ,  Hiroyasu Fujii ,  Yozo Suga ,  Tadashi Nakayama ,  Katsuro Kuroki ,  Yosuke Kurosaki

IPC分类号： C21D1/72 ,  C21D8/12

CPC分类号： C21D8/1255 ,  C21D8/1277 ,  C21D8/1283 ,  C21D1/72 ,  C21D8/1272 ,  C21D8/1288 ,  C21D8/1294

摘要： In order to provide a very low iron loss, it is necessary to render the surface of a steel sheet smooth (specular). In the present invention, this is effected in a finish annealing furnace to simultaneously attain a high magnetic flux density and a specular surface. Specifically, after the completion of decarburization annealing, a steel material is pickled to remove an oxide layer present on the surface of the steel sheet, coated with an annealing separator comprising a substance nonreactive or less reactive with SiO.sub.2 and then subjected to finish annealing to provide a grain oriented electrical steel sheet having a specular surface. Magnetic domain division and tension coating of the steel sheet can provide a low iron loss value. In the finish annealing, since no time is required for dehydration, the annealing time can be shortened.

摘要翻译： PCT No.PCT / JP93 / 00136 Sec。 371日期1994年1月7日 102（e）日期1994年1月7日PCT提交1993年2月4日PCT公布。 公开号WO93 / 23577 日期1993年11月25日为了提供非常低的铁损，必须使钢板的表面光滑（镜面）。 在本发明中，这是在最终退火炉中实现的，以同时获得高的磁通密度和镜面。 具体地说，在脱碳退火结束后，将钢材酸洗以除去存在于钢板表面上的氧化物层，涂覆有退火分离体，该退火分离剂包含与SiO 2反应性较差或反应性低的物质，然后进行最终退火，以提供 具有镜面的晶粒取向电工钢板。 钢板的磁畴分割和张力涂层可以提供低铁损值。 在最终退火中，由于脱水不需要时间，可以缩短退火时间。

公开(公告)号：US5512110A

公开(公告)日：1996-04-30

申请号：US466866

申请日：1995-06-06

申请人： Yasunari Yoshitomi ,  Katsuro Kuroki ,  Yukio Matsuo ,  Hiroaki Masui ,  Yoshio Nakamura ,  Maremizu Ishibashi ,  Tsuyoshi Kawano ,  Tsutomu Haratani ,  Yoshiyuki Ushigami

发明人： Yasunari Yoshitomi ,  Katsuro Kuroki ,  Yukio Matsuo ,  Hiroaki Masui ,  Yoshio Nakamura ,  Maremizu Ishibashi ,  Tsuyoshi Kawano ,  Tsutomu Haratani ,  Yoshiyuki Ushigami

IPC分类号： C21D8/12 ,  C22C38/02 ,  H01F1/18

CPC分类号： C22C38/02 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1233 ,  C21D8/1283

摘要： In the present invention, grain oriented electrical steel sheets provided by heating a slab comprising, by weight percent, 0.025 to 0.075% of C, 3.4 to 5.0% of Si, 0.015 to 0.080% of sol. Al, 0.0030 to 0.013% of N, 0.014% or less of (S+0.405 Se) and 0.05 to 0.8% of Mn, sol. Al (%)/Si (%) being 0.0080 or more, the balance consisting of Fe and unavoidable impurities at a temperature below 1280.degree. C., hot-rolling the heated slab, subjecting the hot-rolled steel sheet to cold rolling, subjecting the cold-rolled steel sheet to decarbonization annealing with regulating the average diameter of primary recrystallized grains of the steel sheet subjected to decarbonization annealing to 18 to 35 .mu.m in a period between the completion of the decarbonization annealing and the initiation of final annealing, coating the decarburized steel with an annealing separator and subjecting the coated steel sheet to final annealing, wherein the final annealing is effected in such a manner that the partial pressure of nitrogen, P .sub.N2 (%), in the annealing atmosphere is 12.5% or more in a steel sheet temperature range of from 900.degree. C. to 1150.degree. C. in the heating stage of the final annealing, and subjecting the steel sheet to nitriding to cause the steel sheet to absorb 0.0010% by weight or more of nitrogen in a period between the completion of the hot rolling and the initiation of secondary recystallization in the final annealing.

摘要翻译： 在本发明中，通过加热板坯而提供的晶粒取向电工钢板，其包含重量百分比为0.025〜0.075％的C，3.4〜5.0％的Si，0.015〜0.080％的溶胶。 Al，0.0030〜0.013％N，0.014％以下（S + 0.405 Se）和0.05〜0.8％Mn，sol。 Al（％）/ Si（％）为0.0080以上，余量由温度低于1280℃的Fe和不可避免的杂质组成，热轧加热板坯，对热轧钢板进行冷轧， 冷轧钢板进行脱碳退火，将脱碳退火钢板的一次再结晶晶粒的平均直径调整为18〜35μm，在完成脱碳退火和开始最终退火，涂布 所述脱碳钢与退火分离剂一起进行最终退火，其中最终退火以使退火气氛中的氮分压P N2（％）为12.5％以上的方式进行， 在最终退火的加热阶段的钢板温度范围为900〜1150℃，对钢板进行氮化处理，使钢板吸收0.0010％ 在最终退火之间的热轧完成和二次再结晶开始之间的时间内的氮气重量或更多。

公开(公告)号：US4979997A

公开(公告)日：1990-12-25

申请号：US526517

申请日：1990-05-21

申请人： Hisashi Kobayashi ,  Katsuro Kuroki ,  Osamu Tanaka

发明人： Hisashi Kobayashi ,  Katsuro Kuroki ,  Osamu Tanaka

IPC分类号： C23C8/26 ,  C21D3/04 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  H01F1/16

CPC分类号： C21D8/1255 ,  C21D3/04

摘要： A process for producing a grain-oriented steel sheet having superior magnetic and surface film characteristics, which comprises the steps of: heating to a temperature of 1200.degree. C. or lower an electrical steel slab comprising 0.025 to 0.075 wt % C, 2.5 to 4.5 wt % Si, 0.012 wt % or less S, 0.010 to 0.060 wt % acid-soluble Al, 0.010 wt % or less N, 0.080 to 0.045 wt % Mn, and the balance consisting of Fe and unavoidable impurities; hot-rolling the heated slab to form a hot-rolled steel sheet; cold-rolling the hot-rolled sheet to a final product sheet thickness by single cold rolling step or by two or more steps of cold rolling with an intermediate annealing therebetween; decarburization-annealing the cold-rolled sheet under a condition such that decarburization alone is effected until primary-recrystallized grains grow to an average grain size of at least 15 .mu.m, and thereafter, concurrently effecting a decarburization and nitriding; applying an annealing separator to the decarburization-annealed sheet; and final-annealing the annealing separator-applied sheet.

公开(公告)号：US4863532A

公开(公告)日：1989-09-05

申请号：US179530

申请日：1988-04-08

申请人： Katsuro Kuroki ,  Toshiya Wada ,  Shozaburo Nakashima

发明人： Katsuro Kuroki ,  Toshiya Wada ,  Shozaburo Nakashima

IPC分类号： C22C38/00 ,  C21D8/12 ,  C22C38/02 ,  H01F1/16 ,  H01F1/18

CPC分类号： C21D8/12 ,  C22C38/02 ,  H01F1/18 ,  C21D8/1233 ,  C21D8/1266

摘要： In a grain-oriented electromagnetic steel sheet which is produced by a process including a cold-rolling step(s), the final reduction ratio of the cold-rolling step(s) being high, a technical means for refining the secondary recrystallized grains is particularly important. One technical means is the incorporation of tin into silicon steel material. This, however, involves a problem because tin incorporated into silicon steel material deteriorates the surface coating which imparts tension to a grain-oriented electromagnetic steel sheet.The incorporation of copper into silicon steel material has been avoided since it causes secondary recrystallization to be unstable.The present invention is characterized by the combined incorporation of tin and copper into molten steel so as to simultaneously refine the secondary recrystallized grains and to form a good surface coating. The grain-oriented electromagnetic steel sheet of the present invention contains from 2.5% to less than 4.0% of silicon, from 0.03% to 0.15% of manganese, from 0.03% to 0.5% of tin, and from 0.02% to less than 0.3% of copper.

摘要翻译： 在通过包括冷轧步骤的工艺生产的晶粒取向电磁钢板中，冷轧步骤的最终压下率高，用于精炼二次再结晶晶粒的技术手段是 特别重要。 一种技术手段是将锡掺入硅钢材料中。 然而，这涉及到一个问题，因为掺入硅钢材料中的锡劣化了向晶粒取向电磁钢板施加张力的表面涂层。 已经避免了将铜掺入硅钢材料中，因为它导致二次再结晶不稳定。 本发明的特征在于将锡和铜组合并入钢水中，以同时精炼二次再结晶晶粒并形成良好的表面涂层。 本发明的晶粒取向电磁钢板含有2.5％〜4.0％的硅，0.03％〜0.15％的锰，0.03〜0.5％的锡，0.02％以上且小于0.3％ 的铜。

公开(公告)号：US4806176A

公开(公告)日：1989-02-21

申请号：US381877

申请日：1982-05-25

申请人： Jiro Harase ,  Katsuro Kuroki ,  Toshiya Wada ,  Shozaburo Nakashima

发明人： Jiro Harase ,  Katsuro Kuroki ,  Toshiya Wada ,  Shozaburo Nakashima

IPC分类号： C22C38/00 ,  C21D8/12 ,  C21D9/46 ,  H01F1/16

CPC分类号： C21D8/1261 ,  C21D8/1233

摘要： The present invention relates to an improvement in the precipitation annealing of a hot-rolled steel sheet or strip which is carried out immediately before cold-rolling in the production of a grain-oriented electromagnetic steel sheet or strip. Conventionally, precipitation annealing is carried out by heating a steel strip to a temperature of from 750.degree. to 1200.degree. C. and then quenching it. The present invention proposes to control the cooling rate during primary cooling, i.e. from a holding temperature (T.sub.1 temperature) of from 1080.degree. to 1200.degree. C. down to an intermediate temperature (T.sub.2 temperature) of from 900.degree. to 980.degree. C., and to control the staying time during primary cooling so that excellent magnetic properties can be obtained regardless of the unavoidable variation in the Al and Si content. The present invention also proposes to control the rate of temperature elevation between 800.degree. C. and the holding temperature as to obtain AlN particles having an optimum size.

摘要翻译： 本发明涉及在生产面向电磁钢板或条带的冷轧之前进行的热轧钢板或钢带的析出退火的改进。 通常，通过将钢带加热至750℃至1200℃的温度进行沉淀退火，然后淬火。 本发明提出了控制一次冷却期间的冷却速度，即从保持温度（T1温度）为1080℃至1200℃，直到900℃至980℃的中间温度（T2温度） 并且控制一次冷却中的停留时间，从而可以获得优异的磁特性，而不管Al和Si含量的不可避免的变化如何。 本发明还提出了控制800℃和保持温度之间的升温速率以获得具有最佳尺寸的AlN颗粒。

公开(公告)号：US4203784A

公开(公告)日：1980-05-20

申请号：US902811

申请日：1978-05-04

申请人： Katsuro Kuroki ,  Osamu Tanaka

发明人： Katsuro Kuroki ,  Osamu Tanaka

IPC分类号： C22C38/00 ,  C21D8/12 ,  H01F1/147 ,  H01F1/16 ,  H01F1/04

CPC分类号： H01F1/14783 ,  C21D8/1294

摘要： A grain oriented electromagnetic steel sheet has a plurality of linear fine strains having a traverse section of a concave hollow on it in the steel sheet shows a very low iron loss in its use.

摘要翻译： 在钢板中具有多个在其上具有凹形中空的横截面的线性微细应变的电磁钢板在其使用中显示出非常低的铁损。

公开(公告)号：US5507883A

公开(公告)日：1996-04-16

申请号：US257765

申请日：1994-06-09

申请人： Osamu Tanaka ,  Hiroaki Masui ,  Hotaka Honma ,  Katsuro Kuroki ,  Tsutomu Haratani ,  Yoichi Mishima ,  Maremizu Ishibashi ,  Yoshio Nakamura

发明人： Osamu Tanaka ,  Hiroaki Masui ,  Hotaka Honma ,  Katsuro Kuroki ,  Tsutomu Haratani ,  Yoichi Mishima ,  Maremizu Ishibashi ,  Yoshio Nakamura

IPC分类号： C21D8/12 ,  H01F1/147 ,  H01F1/04

CPC分类号： C21D8/1283 ,  H01F1/14783 ,  C21D8/1255 ,  C21D8/1272

摘要： A grain oriented electrical steel sheet having no significant glass film and having a high magnetic flux density and an excellent iron loss property, comprising, in terms of by weight, 2.5 to 4.5% of Si, the steel sheet having, as oxides on its surface, a glass film comprising 0.6 g/m.sup.2 or less in total of forsterite and spinel composed of MgO, SiO.sub.2 and Al.sub.2 O.sub.3 and an insulating coating having a thickness of 6 .mu.m or less, the face tension imparted on the surface of the steel sheet by the coating being in the range of from 0.5 to 2.0 kg/mm.sup.2. In the final box annealing of the steel sheet after primary recrystallization annealing, use is made of an annealing separator comprising 100 parts by weight of MgO and, added thereto, 2 to 30 parts by weight of at least one member selected from the group consisting of chlorides, carbonates, nitrates, sulfates and sulfides of Li, K, Bi, Na, Ba, Ca, Mg, Zn, Fe, Zr, Sr, Sn, Al, etc., and the heating in the final box annealing is effected in an atmosphere comprising N.sub.2 and H.sub.2 with the nitrogen content being 30% or more at a heating rate of 20.degree. C./hr or less, and a seam or spotty flaw is imparted at an angle of 45.degree. to 90.degree. to the rolling direction of the steel sheet.

摘要翻译： 一种不具有显着玻璃膜并且具有高磁通密度和优异的铁损特性的晶粒取向电工钢板，其中，按重量计包含2.5至4.5％的Si，该钢板在其表面上具有氧化物 ，由MgO，SiO 2和Al 2 O 3组成的镁橄榄石和尖晶石的总计为0.6g / m 2以下的玻璃膜和厚度为6μm以下的绝缘涂层，通过以下方式赋予钢板表面的表面张力 涂层在0.5至2.0kg / mm 2的范围内。 在一次再结晶退火后的钢板的最终退火中，使用包含100重量份MgO的退火分离剂，向其中加入2〜30重量份的选自以下的至少一种： Li，K，Bi，Na，Ba，Ca，Mg，Zn，Fe，Zr，Sr，Sn，Al等的氯化物，碳酸盐，硝酸盐，硫酸盐和硫化物，最终箱退火中的加热是 包含N 2和H 2的气氛，氮含量在20℃/小时以下的加热速率为30％以上，接缝或斑点缺陷与轧制方向成45度〜90度的角度 的钢板。

公开(公告)号：US4994120A

公开(公告)日：1991-02-19

申请号：US274432

申请日：1988-11-18

申请人： Nobuyuki Takahashi ,  Yozo Suga ,  Katsuro Kuroki ,  Satoshi Arai

发明人： Nobuyuki Takahashi ,  Yozo Suga ,  Katsuro Kuroki ,  Satoshi Arai

IPC分类号： C21D8/12 ,  C22C38/02

CPC分类号： C22C38/02 ,  C21D8/1255

摘要： Disclosed is a process for the preparation of a grain oriented electrical steel sheet having a high flux desnity, which comprises hot-rolling a slab comprising 1.5 to 4.8% by weight of Si, 0.012 to 0.050 by weight of acid-soluble Al, up to 0.012% by weight of at least one member selected from S and Se, 0.0010 to 0.0120% by weight of N, Mn in an amount of up to 0.45% by weight which satisfies the requirement of Mn/(S+Se).gtoreq.4.0 and 0.005 to 0.0080% by weight of B, with the balance comprising Fe and unavoidable impurities, and optionally, further comprising 0.0020 to 0.0120% by weight of Ti, performing cold rolling once or at least twice with intermediate annealing to obtain a final thickness, performing decarburization annealing in a wet hydrogen atomsphere, coating an annealing separator on the steel sheet surface, performing finish annealing for a secondary recrystallization and purification of the steel, and performing a nitriding treatment during the period of from the point of termination of final cold rolling to the point of initiation of secondary recrystallization at the finish annealing step. Furthermore, the above-mentioned slab is heated at a temperature lower than 1200.degree. C. before the hot rolling step, and even in the production of a thin product having a thickness of 0.10 to 0.23 mm, a high flux density can be realized.

公开(公告)号：US4753692A

公开(公告)日：1988-06-28

申请号：US876653

申请日：1986-06-17

申请人： Katsuro Kuroki ,  Toshiya Wada ,  Shozaburo Nakashima

发明人： Katsuro Kuroki ,  Toshiya Wada ,  Shozaburo Nakashima

IPC分类号： C22C38/00 ,  C21D8/12 ,  C22C38/02 ,  H01F1/16 ,  H01F1/18 ,  H01F1/04

CPC分类号： C21D8/12 ,  C22C38/02 ,  H01F1/18 ,  C21D8/1233 ,  C21D8/1266

摘要： In a grain-oriented electromagnetic steel sheet which is produced by a process including a cold-rolling step(s), the final reduction ratio of the cold-rolling step(s) being high, a technical means for refining the secondary recrystallized grains is particularly important. One technical means is the incorporation of tin into silicon steel material. This, however, involves a problem because tin incorporated into silicon steel material deteriorates the surface coating which imparts tension to a grain-oriented electromagnetic steel sheet.The incorporation of copper into silicon steel material has been avoided since it causes secondary recrystallization to be unstable.The present invention is characterized by the combined incorporation of tin and copper into molten steel so as to simultaneously refine the secondary recrystallized grains and to form a good surface coating. The grain-oriented electromagnetic steel sheet of the present invention contains from 2.5% to less than 4.0% of silicon, from 0.03% to 0.15% of manganese, from 0.03% to 0.5% of tin, and from 0.02% to less than 0.3% of copper.

摘要翻译： 在通过包括冷轧步骤的工艺生产的晶粒取向电磁钢板中，冷轧步骤的最终压下率高，用于精炼二次再结晶晶粒的技术手段是 特别重要。 一种技术手段是将锡掺入硅钢材料中。 然而，这涉及到一个问题，因为掺入硅钢材料中的锡劣化了向晶粒取向电磁钢板施加张力的表面涂层。 已经避免了将铜掺入硅钢材料中，因为它导致二次再结晶不稳定。 本发明的特征在于将锡和铜组合并入钢水中，以同时精炼二次再结晶晶粒并形成良好的表面涂层。 本发明的晶粒取向电磁钢板含有2.5％〜4.0％的硅，0.03％〜0.15％的锰，0.03〜0.5％的锡，0.02％以上且小于0.3％ 的铜。

公开(公告)号：US4692193A

公开(公告)日：1987-09-08

申请号：US791294

申请日：1985-10-25

申请人： Yasunari Yoshitomi ,  Katsuro Kuroki ,  Kenzo Iwayama

发明人： Yasunari Yoshitomi ,  Katsuro Kuroki ,  Kenzo Iwayama

IPC分类号： C22C38/00 ,  C21D8/12 ,  C22C38/02 ,  C22C38/60 ,  H01F1/16 ,  H01F1/04

CPC分类号： C21D8/1255 ,  C22C38/02 ,  C21D8/1233 ,  C21D8/1266 ,  C21D8/1288

摘要： A thin-gauge (0.10-0.23 mm thick) grain-oriented electrical steel sheet is produced by a process characterized by a decarburization which is carried out after the hot-rolling and before the final cold-rolling, after which the known, decarburization annealing and finishing annealing are carried out. The steel composition is adjusted to induce the secondary recrystallization by the AlN inhibitor. The reduction at the final cold-rolling is determined to be high to obtain a high magnetic flux density but tends to instabilize the secondary recrystallization unless the inventive decarburization is carried out.

摘要翻译： 通过特征在于在热轧后和最终冷轧之前进行的脱碳的方法制造薄规格（0.10-0.23mm厚）的晶粒取向电工钢板，之后已知的脱碳退火 进行精加工退火。 调整钢组合物以诱导AlN抑制剂的二次再结晶。 除非进行本发明的脱碳，否则最终冷轧时的还原确定为高以获得高磁通密度，但倾向于使二次再结晶不稳定。