公开(公告)号：US5049205A

公开(公告)日：1991-09-17

申请号：US589338

申请日：1990-09-27

申请人： Nobuyuki Takahashi ,  Katsuro Kuroki ,  Yozo Suga ,  Kiyoshi Ueno

发明人： Nobuyuki Takahashi ,  Katsuro Kuroki ,  Yozo Suga ,  Kiyoshi Ueno

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

CPC分类号： C21D8/1255 ,  C22C38/02 ,  C21D3/04 ,  C21D8/1233 ,  C21D8/1283

摘要： The present invention relates to a process for preparing a unidirectional silicon steel sheet having a high magnetic flux density which comprises heating a silicon steel slab comprising by weight 0.025 to 0.075% of carbon, 2.5 to 4.5% of silicon, 0.015% or less of sulfur, 0.010 to 0.050% of acid-soluble aluminum, 0.0010 to 0.012% of nitrogen, 0.050 to 0.45% of manganese and 0.01 to 0.10% of tin and optionally 0.0005 to 0.0080% of boron with the balance being iron and unavoidable impurities, at 1200.degree. C. or below; hot-rolling the slab; subjecting the slab to rolling once or two or more times wherein intermediate annealing is provided, thereby attaining a percentage final rolling of 80% or more; subjecting the resultant steel sheet to decarburizing annealing in a wet hydrogen atmosphere; coating the steel sheet with an annealing separator; conducting finishing annealing for secondary recrystallization and purification of the steel; and subjecting the steel sheet to a nitriding treatment between after the ignition for decarburizing annealing and before the initiation of the secondary recrystallization in the finishing annealing.

公开(公告)号：US4938807A

公开(公告)日：1990-07-03

申请号：US301637

申请日：1989-01-25

申请人： Nobuyuki Takahashi ,  Yozo Suga ,  Katsuro Kuroki

发明人： Nobuyuki Takahashi ,  Yozo Suga ,  Katsuro Kuroki

IPC分类号： C21D8/12 ,  C22C38/02

CPC分类号： C21D8/1255 ,  C22C38/02

摘要： Disclosed is a process for the preparation of a grain oriented silicon steel about sheet having a high flux density, which comprises hot-rolling a slab comprising 1.5 to 4.8% by weight of Si, 0.012 to 0.050% by weight of Al, 0.0010 to 0.0120% by weight of N, 0.0020 to 0.0150% by weight of Ti, up to 0.45% by weight of Mn and up to 0.012% by weight of at least one member selected S and Se, which satisfies the requirement 0.06 to 0.6 of Ti/N (at % ratio) and Mn/(S+Se).gtoreq.4.0 (weight ratio) with the balance comprising Fe and unavoidable impurities, to cold-rolling, performing decarburization annealing, coating an annealing separator on the steel sheet surface, then performing finish annealing, and performing a nitriding treatment of the steel sheet 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.

公开(公告)号：US4363677A

公开(公告)日：1982-12-14

申请号：US227379

申请日：1981-01-22

申请人： Tadashi Ichiyama ,  Shigehiro Yamaguchi ,  Tohru Iuchi ,  Motoharu Nakamura ,  Yozo Suga

发明人： Tadashi Ichiyama ,  Shigehiro Yamaguchi ,  Tohru Iuchi ,  Motoharu Nakamura ,  Yozo Suga

IPC分类号： C21D1/09 ,  C21D8/12 ,  H01F1/147 ,  H01F1/04

CPC分类号： C21D8/1294 ,  C21D1/09 ,  H01F1/14783 ,  Y10T428/12924

摘要： A process of providing electromagnetic steel strips or sheet with excellent magnetic properties. The process comprises the steps of:irradiating with a laser-beam the surface of an electromagnetic steel sheet which has been finally annealed, thereby locally forming marks of the laser-beam irradiation on the surface of the steel, and;subsequently, subjecting the steel sheet to the formation of an insulating film on the sheet surface at a temperature of the sheet not exceeding 600.degree. C.

摘要翻译： 提供具有优异磁性的电磁钢带或片材的方法。 该方法包括以下步骤：用激光束照射最终退火的电磁钢板的表面，从而在钢表面上局部地形成激光束照射标记; 随后在不超过600℃的片材的温度下对钢板在片材表面上形成绝缘膜。

公开(公告)号：US5308411A

公开(公告)日：1994-05-03

申请号：US835982

申请日：1992-02-20

申请人： Yozo Suga ,  Yoshiyuki Ushigami ,  Hodaka Honma ,  Nobuyuki Takahashi

发明人： Yozo Suga ,  Yoshiyuki Ushigami ,  Hodaka Honma ,  Nobuyuki Takahashi

IPC分类号： C22C38/02 ,  H01F1/04

CPC分类号： C22C38/02

摘要： An ultrahigh silicon, grain-oriented electrical steel sheet having a magnetic flux density, B.sub.8, of 1.57 or more and a degree of azimuth orientation, R (B.sub.8 /B.sub.s) of 0.87 or more is provided by cold-rolling an ultrahigh silicon steel sheet comprising by weight 0.005 to 0.023% of C, 5 to 7.1% of Si, 0.014% or less of S, 0.013 to 0.055% of acid soluble Al and 0.0095% or less of total N with the balance consisting of Fe and unavoidable impurities at a temperature in the range of from 120.degree. to 380.degree. C. optionally after annealing at a temperature in the range of from 800.degree. to 1100.degree. C., subjecting the cold-rolled sheet to decarburization annealing, coating the annealed sheet with an annealing separator, coiling the coated sheet to prepare a strip coil and subjecting the strip coil to high-temperature finish annealing for secondary recrystallization, the steel sheet being subjected to nitriding during a period from the decarburization annealing to the initiation of secondary recrystallization in the step of high-temperature finish annealing, to increase the nitrogen content.

摘要翻译： PCT No.PCT / JP91 / 00829 Sec。 371日期1992年2月20日 102（e）日期1992年2月20日PCT提交1991年6月20日PCT公布。 出版物WO91 / 19825 日期为1991年12月26日。具有磁通密度B8为1.57以上且方位取向度R（B8 / Bs）为0.87以上的超高硅晶粒取向电工钢板由冷 卷取超高硅钢板，其重量为0.005〜0.023％C，5〜7.1％Si，0.014％以下S，0.013〜0.055％酸溶性Al和0.0095％以下的总N，余量 在120〜380℃的温度范围内由Fe和不可避免的杂质构成，任选在800〜1100℃的温度退火后，对冷轧板进行脱碳退火， 用退火分离机对退火后的板进行涂布，卷取被覆板，制备带状卷材，对带状卷材进行二次再结晶的高温成品退火，在脱碳退火至起始期间，钢板进行氮化 的秒 在高温退火的步骤中进行重结晶，提高氮含量。

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：US5259892A

公开(公告)日：1993-11-09

申请号：US834260

申请日：1992-02-11

申请人： Takeshi Kubota ,  Yozo Suga

发明人： Takeshi Kubota ,  Yozo Suga

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

CPC分类号： C21D8/1227 ,  C22C38/02 ,  C21D8/1233 ,  C21D8/1244

摘要： The present invention relates to a process for producing a non-oriented electromagnetic steel sheet having excellent magnetic properties after stress relief annealing, which comprises, after hot rolling or hot-rolled sheet annealing, subjecting a steel comprising, on the weight basis, 0.010% or less of carbon and from 4.0 to 8.0% of silicon with the balance consisting of Fe and unavoidable impurity elements, to cold-rolling at a rolling temperature in the range of from 100.degree. to 300.degree. C. once or at least twice with intermediate annealing, subjecting the cold-rolled sheet to continuous annealing, and further subjecting the annealed sheet to skin pass rolling with a reduction ratio in the range of from 2 to 15%. This process can provide a non-oriented electromagnetic steel sheet having excellent magnetic properties even when the stress relief annealing is conducted for a short period of time.

公开(公告)号：US4929286A

公开(公告)日：1990-05-29

申请号：US267729

申请日：1988-10-07

申请人： Hajime Komatsu ,  Mitsuro Tanino ,  Yozo Suga ,  Toyohiko Konno

发明人： Hajime Komatsu ,  Mitsuro Tanino ,  Yozo Suga ,  Toyohiko Konno

IPC分类号： H01F1/16 ,  C21D8/12

CPC分类号： C21D8/1255 ,  C21D8/1283

摘要： In the production of a grain-oriented electrical steel sheet, instead of conventional inhibitors a novel (Al, Si)N inhibitor is utilized. This inhibitor is formed by obtaining an incomplete solution of Al and N and then nitriding the decarburization annealed steel sheet prior to initiation of a secondary recrystallization. The fine inhibitor can be formed in a large amount, thereby enhancing the magnetic flux density.

摘要翻译： 在晶粒取向电工钢板的制造中，代替常规的抑制剂，可以使用新的（Al，Si）N抑制剂。 该抑制剂通过获得Al和N的不完全溶液，然后在二次再结晶开始之前氮化脱碳退火的钢板而形成。 可以大量形成微细抑制剂，从而提高磁通密度。

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：US5370748A

公开(公告)日：1994-12-06

申请号：US974354

申请日：1992-11-10

申请人： Yozo Suga ,  Yoshiyuki Ushigami

发明人： Yozo Suga ,  Yoshiyuki Ushigami

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

CPC分类号： C21D8/1233 ,  C21D8/1272

摘要： The present invention is a process for manufacturing a double oriented electrical steel sheet having a high magnetic flux density by carrying out a low temperature annealing for the secondary recrystallization by the use of AlN as inhibitor, characterized by hot-rolling a silicon steel slab comprising 1.8-4.8% by weight of Si, 0.008-0.048% by weight of acid soluble Al, 0.0028-0.0100% by weight of acid soluble Al, 0.0028-0.0100% by weight of total N, not more than 0.016% by weight of S and the balance being Fe and unavoidable impurities into a hot-rolled sheet, subjecting the sheet to cold-rolling at a reduction rate of 40-80%, subsequently subjecting the sheet to another cold-rolling at a reduction rate of 30-70% in the direction crossing the cold-rolled direction, annealing at 750.degree.-950.degree. C. in a wet hydrogen atmosphere for decarburization, and carrying out the final finishing annealing which comprises a stage for completing the secondary recrystallizing at a temperature of 920.degree.-1100.degree. C., followed by a stage for purification.

摘要翻译： 本发明是一种通过使用AlN作为抑制剂进行二次再结晶的低温退火来制造具有高磁通密度的双重取向电工钢板的方法，其特征在于，热轧含有1.8 -4.8重量％的Si，0.008-0.048重量％的酸溶性Al，0.0028-0.0100重量％的酸溶性Al，0.0028-0.0100重量％的总N，不大于0.016重量％的S和 余量为Fe和不可避免的杂质进入热轧板中，以40-80％的还原率对板进行冷轧，随后将片材以30-70％的还原率进行另一次冷轧 与冷轧方向交叉的方向，在湿氢气氛中在750-950℃退火脱碳，进行最终精加工退火，其包括在920℃的温度下完成二次再结晶的阶段 EG-1100℃，然后进行纯化。

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。