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    • 1. 发明授权
    • 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 YoshitomiYozo SugaNobuyuki TakahashiYoshiyuki UshigamiTadashi Nakayama
    • Yasunari YoshitomiYozo SugaNobuyuki TakahashiYoshiyuki UshigamiTadashi Nakayama
    • C21D8/12C21D11/00C22C38/00C22C38/02C22C38/06H01F1/16
    • C21D8/1255C21D11/00C21D8/1283
    • 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。
    • 3. 发明授权
    • Process for producing grain-oriented electrical steel sheet having high
magnetic flux density
    • 具有高磁通密度的晶粒取向电工钢板的制造方法
    • US5186762A
    • 1993-02-16
    • US770775
    • 1991-10-04
    • Yoshiyuki UshigamiTadashi NakayamaNobuyuki Takahashi
    • Yoshiyuki UshigamiTadashi NakayamaNobuyuki Takahashi
    • C21D8/12
    • C21D8/1255C21D8/1272
    • A process for producing a grain-oriented electrical steel sheet having a high magnetic flux density, comprising the steps of: heating a steel slab comprising 1.8 to 4.8 wt % Si, 0.012 to 0.050 wt % acid-soluble A1, 0.010 wt % or less N, and the balance consisting of Fe and unavoidable impurities, to a temperature for hot rolling; hot-rolling the heated slab to form a hot-rolled strip; cold-rolling the hot-rolled strip to a final product sheet thickness at a final cold rolling reduction of 80% or more by a single step of cold rolling or by two or more steps of cold rolling with an intermediate annealing step inserted therebetween; primary-recrystallization-annealing the cold-rolled strip; final-annealing the primary-recrystallization-annealed strip so that secondary-recrystallized grains substantially completely grow up in a temperature region of from 1000.degree. to 1100.degree. C. and then purification is effected above 1100.degree. C.; and subjecting the primary-recrystallization-annealed steel strip to a nitriding treatment before a secondary recrystallization occurs during the final annealing.
    • 一种具有高磁通密度的方向性电磁钢板的制造方法,其特征在于,包括以下工序:将含有1.8〜4.8重量%的Si,0.012〜0.050重量%的酸溶性Al,0.010重量%以下的钢坯 N,余量由Fe和不可避免的杂质构成,成为热轧温度; 热轧板坯以形成热轧带材; 通过冷轧的一个步骤或冷轧两个或更多个步骤,在其间插入中间退火步骤,将热轧带材冷轧至最终产品板厚度,最终冷轧压下率为80%以上; 一次再结晶退火冷轧带材; 对一次再结晶退火的带材进行最终退火,使得二次再结晶晶粒在1000℃至1100℃的温度范围内基本上完全生长,然后在1100℃以上进行纯化。 并且在最终退火期间发生二次再结晶之前对一次再结晶退火的钢带进行氮化处理。
    • 5. 发明授权
    • Very thin electrical steel strip having low core loss and high magnetic
flux density and a process for producing the same
    • 具有低铁损和高磁通密度的非常薄的电工钢带及其制造方法
    • US5415703A
    • 1995-05-16
    • US022412
    • 1993-02-16
    • Yoshiyuki UshigamiNorito AbeSadami KousakaTadao NozawaOsamu HonjoTadashi Nakayama
    • Yoshiyuki UshigamiNorito AbeSadami KousakaTadao NozawaOsamu HonjoTadashi Nakayama
    • C21D8/12H01F1/147
    • H01F1/14775C21D8/1233C21D8/1244
    • 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.
    • 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。