公开(公告)号：US5759293A

公开(公告)日：1998-06-02

申请号：US554531

申请日：1995-11-06

申请人： Nobuyuki Takahashi ,  Yasunari Yoshitomi ,  Tadashi Nakayama ,  Yoshiyuki Ushigami

发明人： Nobuyuki Takahashi ,  Yasunari Yoshitomi ,  Tadashi Nakayama ,  Yoshiyuki Ushigami

IPC分类号： C21D3/04 ,  C21D8/12 ,  H01F1/04

CPC分类号： C21D8/1255 ,  C21D3/04 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272

摘要： A decarburization-annealed steel strip as an intermediate material for grain-oriented electrical steel strip having good secondary recrystallization and excellent electrical properties is provided by causing a steel strip to possess a micro-structure in which the primary recrystallization grains have an average diameter d of not less than 15 .mu.m and a coefficient of diameter deviation .sigma.* of not more than 0.6.

摘要翻译： 通过使钢带具有其中一次再结晶晶粒具有平均直径+ E的微观结构，提供具有良好的二次再结晶和优异的电特性的用于取向电工钢带的中间材料的脱碳退火钢带 ，ovs d + EE不小于15μm，直径偏差系数σ*不大于0.6。

公开(公告)号：US5145533A

公开(公告)日：1992-09-08

申请号：US769586

申请日：1991-10-02

申请人： Yasunari Yoshitomi ,  Yozo Suga ,  Nobuyuki Takahashi ,  Yoshiyuki Ushigami ,  Tadashi Nakayama

发明人： Yasunari Yoshitomi ,  Yozo Suga ,  Nobuyuki Takahashi ,  Yoshiyuki Ushigami ,  Tadashi Nakayama

IPC分类号： C21D8/12 ,  C21D11/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  H01F1/16

CPC分类号： C21D8/1255 ,  C21D11/00 ,  C21D8/1283

摘要： A process for producing a grain-oriented electrical steel sheet having an excellent magnetic characteristic, comprising the steps of: heating to a temperature lower than 1280.degree. C. a steel slab comprising 0.025 to 0.075 wt % C, 2.5 to 4.5 wt % Si, 0.010 to 0.060 wt % acid-soluble Al, 0.0030 to 0.0130 wt % N, 0.014 wt % or less (S+0.405 Se), 0.05 to 0.8 wt % Mn, and the balance consisting of Fe and unavoidable impurities; hot-rolling the thus heated slab to form a hot-rolled strip; cold-rolling the hot-rolled strip to form a cold-rolled strip; decarburization-annealing the cold-rolled strip; applying an annealing separator on the strip; final-annealing the strip; measuring a primary-recrystallized grain size in the stage after completion of a primary recrystallization during the decarburization annealing and before completion of a secondary recrystallization during the final annealing; and controlling in that stage the subsequent grain growth of primary-recrystallized grains by an absorption of nitrogen into the steel strip in accordance with the measured grain size.

摘要翻译： 一种具有优异磁特性的晶粒取向电工钢板的制造方法，包括以下步骤：加热至低于1280℃的钢坯，其包含0.025〜0.075重量％的C，2.5〜4.5重量％的Si， 0.010〜0.060重量％的酸溶性Al，0.0030〜0.0130重量％的N，0.014重量％以下（S + 0.405 Se），0.05〜0.8重量％的Mn，余量由Fe和不可避免的杂质构成。 热轧如此加热的板坯以形成热轧带材; 冷轧热轧钢带以形成冷轧带材; 对冷轧带材进行脱碳退火; 在带上施加退火分离器; 对带进行最终退火; 在脱碳退火期间完成一次再结晶之后的阶段和在最终退火期间二次再结晶完成之前的阶段中测量一次再结晶的晶粒尺寸; 并且在该阶段通过根据测量的晶粒尺寸将氮吸收到钢带中来控制一次再结晶晶粒随后的晶粒生长。

公开(公告)号：US5346559A

公开(公告)日：1994-09-13

申请号：US34615

申请日：1993-03-19

申请人： Yoshiyuki Ushigami ,  Satoshi Arai ,  Yozo Suga ,  Yasunari Yoshitomi ,  Nobuyuki Takahashi ,  Takehide Senuma

发明人： Yoshiyuki Ushigami ,  Satoshi Arai ,  Yozo Suga ,  Yasunari Yoshitomi ,  Nobuyuki Takahashi ,  Takehide Senuma

IPC分类号： C21D8/12

CPC分类号： C21D8/1233 ,  C21D8/1277

摘要： The present invention provides a process for manufacturing a double oriented electrical steel sheet having a high flux density by suppressing the growth of the secondary recrystallization of {110} oriented grains from the surface of the steel sheet in the hot-rolling stage or cold-rolling stage, which process comprises subjecting a hot rolled sheet comprised of 0.8-6.7% by weight of Si, 0.008-0.048% by weight of acid soluble Al, 0.010% by weight or less of N, and the balance being Fe and unavoidable impurities to a cold-rolling at a reduction rate of 40-80%, and then subjecting the resulting sheet to another cold-rolling in the direction vertical to the above cold-rolled direction at the reduction rate of 30-70% in the final thickness, followed by the steps of annealing for the primary recrystallization, applying an annealing separator, and applying finishing annealing for the secondary recrystallization and purification of steel, wherein the rolling in the finishing hot-rolling stage is carried out at the accumulated reduction rate of 20% or more under the condition that the friction coefficient between the rolls and the steel sheet is not more than 0.25; and wherein the accumulated reduction rate in the last three passes in the hot-rolling is not more than 80%; and further, wherein material of more than 1/10 of the total thickness is removed from both surfaces of the hot-rolled sheet; or wherein the cold-rolling is carried out using a work roll having a diameter of not less than 150 mm.

摘要翻译： 本发明提供了一种制造具有高磁通密度的双重取向电工钢板的方法，该方法通过抑制热轧阶段中钢板表面的{110} 取向晶粒的二次再结晶生长，或 冷轧阶段，该方法包括将由0.8-6.7重量％的Si，0.008-0.048重量％的酸溶性Al，0.010重量％或更少的N组成的热轧板，其余为Fe和 不可避免的杂质以40-80％的还原率进行冷轧，然后在30-70％的还原率下将所得片材沿垂直于上述冷轧方向的方向进行另一次冷轧 最终厚度，然后进行一次再结晶退火的步骤，施加退火分离剂，并对钢的二次再结晶和精炼进行精加工退火，其中精轧热轧中的轧制 在辊和钢板之间的摩擦系数不大于0.25的条件下，以20％以上的累积压下率进行阶段化; 并且其中热轧中最后三道次的累积压下率不大于80％; 并且进一步地，其中从所述热轧板的两个表面去除总厚度的1/10以上的材料; 或者使用直径不小于150mm的工作辊进行冷轧。

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：US5261971A

公开(公告)日：1993-11-16

申请号：US869857

申请日：1992-04-16

申请人： Yasunari Yoshitomi ,  Takehide Senuma ,  Yozo Suga ,  Nobuyuki Takahashi

发明人： Yasunari Yoshitomi ,  Takehide Senuma ,  Yozo Suga ,  Nobuyuki Takahashi

IPC分类号： C21D8/12

CPC分类号： C21D8/1222 ,  C21D8/1233

摘要： A silicon steel slab comprising 0.05 to 0.8% by weight of Mn and up to 0.014% by weight of S+0.405Se is heated at a temperature lower than 1280.degree. C. and hot-rolled under such conditions that the hot rolling-finish temperature is 700.degree. to 1150.degree. C., the cumulative reduction ratio at the final three passes is at least 40%, and the reduction ratio at the final pass is at least 20%, or this silicon steel slab is hot-rolled at a hot rolling-finish temperature of 750.degree. to 1150.degree. C. while adopting the above-mentioned reduction ratio according to need, is maintained at a temperature not lower than 700.degree. C. for at least 1 second, and wound at a winding temperature lower than 700.degree. C. The hot-rolled sheet is subjected to the hot-rolled sheet annealing, finally cold-rolled at a reduction ratio of at least 80%, subjected to the decarburization annealing, and then subjected to the final finish annealing. According to this process, a grain-oriented electrical steel sheet having superior magnetic properties is obtained.

摘要翻译： 包含0.05〜0.8重量％的Mn和至多0.014重量％的S + 0.405Se的硅钢板在低于1280℃的温度下加热，并在热轧终轧温度 为700〜1150℃，最后三道次的累积减速比为40％以上，最后通过时的减速比为20％以上，或将该硅钢板热轧 轧制精加工温度为750〜1150℃，同时根据需要采用上述的还原率，在不低于700℃的温度下保持至少1秒钟，并以低于 700℃。对热轧板进行热轧板退火，最后以至少80％的压下率冷轧进行脱碳退火，然后进行最终成品退火。 根据该方法，得到磁特性优异的晶粒取向电工钢板。

公开(公告)号：US5215603A

公开(公告)日：1993-06-01

申请号：US734294

申请日：1991-07-17

申请人： Tadashi Nakayama ,  Yasunari Yoshitomi

发明人： Tadashi Nakayama ,  Yasunari Yoshitomi

IPC分类号： C21D3/04 ,  C21D8/12 ,  C21D11/00

CPC分类号： C21D8/12 ,  C21D11/00 ,  C21D3/04 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272

摘要： A method of primary recrystallization annealing grain-oriented electrical steel strip comprises the steps of conducting online measurement of the primary recrystallization grain diameter of the steel after primary recrystallization annealing and, based on the result of this measurement, controlling the primary recrystallization grain diameter of the steel after primary recrystallization annealing by varying either or both of the annealing temperature and the pass velocity during the primary recrystallization annealing. The method enables stable production of grain-oriented electrical steel strip exhibiting good secondary recrystallization and excellent electrical properties.

摘要翻译： 一次再结晶退火晶粒取向电工钢带的方法包括以下步骤：对一次再结晶退火后钢的一次再结晶晶粒直径进行在线测量，根据该测量结果，控制一次再结晶晶粒直径 通过改变一次再结晶退火期间的退火温度和通过速度中的一个或两个，进行一次再结晶退火后的钢。 该方法能够稳定地生产显示良好的二次再结晶和优异的电性能的晶粒取向电工钢带。

公开(公告)号：US06858095B2

公开(公告)日：2005-02-22

申请号：US09783408

申请日：2001-02-14

申请人： Yasunari Yoshitomi ,  Hiroaki Masui ,  Nobuyuki Takahashi

发明人： Yasunari Yoshitomi ,  Hiroaki Masui ,  Nobuyuki Takahashi

IPC分类号： C21D8/12 ,  H01F1/147 ,  C11D8/00

CPC分类号： H01F1/14775 ,  C21D8/1244 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1272

摘要： A grain-oriented electrical steel sheet comprising 2.5-4.5% Si by weight and measuring 0.36-1.00 mm in thickness is imparted with a good core loss value for its thickness by controlling its C content, flux density, grain boundary configuration, and deviation degree of crystal orientation in the grains.

摘要翻译： 通过控制其C含量，通量密度，晶界构型和偏差度，将2.5-4.5重量％的Si和厚度为0.36-1.00毫米的晶粒取向电工钢片的厚度赋予其较好的铁损值 晶粒取向晶体。

公开(公告)号：US5545263A

公开(公告)日：1996-08-13

申请号：US246918

申请日：1994-05-20

申请人： Yasunari Yoshitomi ,  Takehide Senuma ,  Yozo Suga ,  Nobuyuki Takahashi

发明人： Yasunari Yoshitomi ,  Takehide Senuma ,  Yozo Suga ,  Nobuyuki Takahashi

IPC分类号： C21D8/12

CPC分类号： C21D8/1222

摘要： In the present invention, a slab of a silicon steel comprising usual components is hot-rolled while adjusting the hot rolling-finish temperature at 750.degree. to 1150.degree. C. and the cumulative reduction ratio of final three passes to at least 40%, or the above-mentioned silicon steel slab is hot-rolled at the above-mentioned hot rolling-finish temperature, the hot-rolled steel sheet is held at a temperature not lower than 35.degree. C. lower than the finish temperature for at least 1 second, and the steel sheet is wound at a winding temperature lower than 700.degree. C. Successively, the hot-rolled steel sheet is subjected, without annealing of the hot-rolled steel sheet, to cold rolling at a reduction ratio of at least 80%, decarburization annealing, and final finish annealing. According to this process, a grain oriented electrical steel sheet having superior magnetic properties can be prepared.

摘要翻译： 在本发明中，将通常成分的硅钢板坯进行热轧，同时将热轧终轧温度调节至750〜1150℃，最终三次的累积压下率至少为40％，或 将上述硅钢板在上述热轧精加工温度下进行热轧，将该热轧钢板保持在不低于最终温度35℃以下的温度下保持至少1秒钟 ，并且在低于700℃的卷取温度下卷绕该钢板。接着，将热轧钢板在不进行热轧钢板的退火的情况下以至少80％的压下率进行冷轧， ，脱碳退火和最终成品退火。 根据该方法，可以制备具有优异磁性的晶粒取向电工钢板。

公开(公告)号：US5472521A

公开(公告)日：1995-12-05

申请号：US322909

申请日：1994-10-13

申请人： Yasunari Yoshitomi ,  Maremizu Ishibashi ,  Yoichi Mishima ,  Koji Yamasaki

发明人： Yasunari Yoshitomi ,  Maremizu Ishibashi ,  Yoichi Mishima ,  Koji Yamasaki

IPC分类号： C21D3/04 ,  C21D8/12 ,  H01F1/147

CPC分类号： C21D8/1222 ,  C21D2201/05 ,  C21D3/04 ,  C21D8/1233 ,  C21D8/1255

摘要： This invention is directed to improve magnetic properties and to stabilize the magnetic properties of a grain oriented electrical steel sheet used as a core of electric appliances. When producing a grain oriented electrical steel sheet by heating a slab containing C, Si, acid-soluble Al, N, not more than 0.014% of S+0.405 Se and 0.05 to 0.8% of Mn and the balance consisting of Fe and unavoidable impurities at a temperature of less than 1,280.degree. C., effecting hot rolling, applying cold rolling, decarbonization annealing and final finish annealing without annealing hot rolled sheet, the production method of the present invention controls the precipitation quantity of AlN in the hot rolled sheet, controls the mean grain size of the primary crystallization grains from completion of decarbonization annealing to the start of final finish annealing, applies nitriding treatment after hot rolling but before the start of secondary recrystallization at final finish annealing, controls the hot rolling condition in accordance with the quantities of acid-soluble Al and N of the slab, and further adds Sn.

摘要翻译： 本发明旨在提高磁性能并稳定用作电器的核心的晶粒取向电工钢板的磁特性。 当通过加热含有C，Si，酸可溶性Al，N，不大于S + 0.405 Se的0.014％和Mn为0.05-0.8％的平板生产晶粒取向电工钢板，其余由Fe和不可避免的杂质 在低于1,280℃的温度下进行热轧，进行冷轧，脱碳退火和最终成品退火而不退火热轧板，本发明的制造方法控制热轧板中的AlN的析出量， 控制从完成脱碳退火到最终成品退火开始的一次结晶粒子的平均粒径，在热轧后进行氮化处理，但是在最终成品退火时进行二次再结晶开始之前，根据 量的酸溶性Al和N，并进一步添加Sn。

公开(公告)号：US5039359A

公开(公告)日：1991-08-13

申请号：US508814

申请日：1990-04-16

申请人： Yasunari Yoshitomi ,  Satoshi Arai

发明人： Yasunari Yoshitomi ,  Satoshi Arai

IPC分类号： C21D8/12 ,  C22C38/00 ,  C22C38/02

CPC分类号： C21D8/1266 ,  C21D8/1222 ,  C21D8/1233

摘要： A process for producing a grain-oriented electrical steel sheet having a superior magnetic characteristic, comprising the steps of: hot-rolling a silicon steel slab comprising 0.021 to 0.100 wt % C, 2.5 to 4.5 wt % Si, one or more elements for forming inhibitors, and the balance consisting of Fe and unavoidable impurities, to form a hot-rolled sheet; coiling the hot-rolled sheet at a coiling temperature lower than 700.degree. C.; subsequently cold-rolling the hot-rolled sheet at a reduction of 80% or more, effected by a plurality of rolling passes, to a final product sheet thickness; holding the steel sheet at a temperature of from 50.degree. to 500.degree. C. for 1 minute or longer at least once at the stage between the rolling passes of the cold rolling; decarburization-annealing the cold-rolled sheet; and final-annealing the decarburization-annealed sheet.