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    • 1. 发明授权
      US5512110A Process for production of grain oriented electrical steel sheet having excellent magnetic properties 失效
    • Process for production of grain oriented electrical steel sheet having excellent magnetic properties
    • 具有优良磁特性的晶粒取向电工钢板的制造方法
    • US5512110A
    • 1996-04-30
    • US466866
    • 1995-06-06
    • Yasunari Yoshitomi , Katsuro Kuroki , Yukio Matsuo , Hiroaki Masui , Yoshio Nakamura , Maremizu Ishibashi , Tsuyoshi Kawano , Tsutomu Haratani , Yoshiyuki Ushigami
    • Yasunari Yoshitomi , Katsuro Kuroki , Yukio Matsuo , Hiroaki Masui , Yoshio Nakamura , Maremizu Ishibashi , Tsuyoshi Kawano , Tsutomu Haratani , Yoshiyuki Ushigami
    • C21D8/12 , C22C38/02 , H01F1/18
    • C22C38/02 , C21D8/1255 , C21D8/1272 , C21D8/1233 , C21D8/1283
    • 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.
    • 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。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 4. 发明授权
      US5346559A Process for manufacturing double oriented electrical steel sheet having high magnetic flux density 失效
    • Process for manufacturing double oriented electrical steel sheet having high magnetic flux density
    • 具有高磁通密度的双重取向电工钢板的制造方法
    • US5346559A
    • 1994-09-13
    • US34615
    • 1993-03-19
    • Yoshiyuki Ushigami , Satoshi Arai , Yozo Suga , Yasunari Yoshitomi , Nobuyuki Takahashi , Takehide Senuma
    • Yoshiyuki Ushigami , Satoshi Arai , Yozo Suga , Yasunari Yoshitomi , Nobuyuki Takahashi , Takehide Senuma
    • C21D8/12
    • C21D8/1233 , C21D8/1277
    • 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.
    • 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。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 5. 发明授权
      US5145533A Process for producing grain-oriented electrical steel sheet having excellent magnetic characteristic 失效
    • Process for producing grain-oriented electrical steel sheet having excellent magnetic characteristic
    • 具有优异磁特性的晶粒取向电工钢板的制造方法
    • US5145533A
    • 1992-09-08
    • US769586
    • 1991-10-02
    • Yasunari Yoshitomi , Yozo Suga , Nobuyuki Takahashi , Yoshiyuki Ushigami , Tadashi Nakayama
    • Yasunari Yoshitomi , Yozo Suga , Nobuyuki Takahashi , Yoshiyuki Ushigami , Tadashi Nakayama
    • C21D8/12 , C21D11/00 , C22C38/00 , C22C38/02 , C22C38/06 , H01F1/16
    • C21D8/1255 , C21D11/00 , C21D8/1283
    • 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.
    • 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。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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