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公开(公告)号：US5062906A
公开(公告)日：1991-11-05
申请号：US427108
申请日：1989-10-12
CPC分类号： C21D8/1222 , C21D8/12
摘要： The present invention is to produce non-oriented electrical steel sheet by a hot direct rolling. The slab is directly sent to the hot rolling without the brief soaking, whereby others than AlN inevitably precipitated check the precipitation of AlN, a roughing and a finish rolling are performed at determined reduction rates, and a delay time is taken between the roughing and the finish rolling, and besides a finish rolling is performed at not more than Ar.sub.3 so that precipitating nuclei of AlN are effectively introduced into the steel, and uniform and coarse AlN precipitation is formed by a coiling at temperature of more than 700.degree. C., thereby to enable to provide uniform and satisfied ferrite grain growth at the recrystallization annealing.
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公开(公告)号：US5116435A
公开(公告)日：1992-05-26
申请号：US330926
申请日：1989-03-27
CPC分类号： C22C38/02 , C21D8/1222 , C22C38/06
摘要： A method for producing a non-oriented electrical steel sheet with precise thickness and homogeneous magnetic property comprising the steps of: making a steel ingot which has: 0.01 wt. % or less C, 0.003 wt. % or less N, 0.01 to 1.0 wt. % Mn, Al and Si satisfying, in wt. %, the formulas of: ##EQU1## provided that (Si %) represents the Si (wt. %) and (Al %) represents Al content (wt. %), and the balance being Fe and inevitable impurities to produce a steel slab; hot-rolling the slab at a finishing temperature of 700.degree. to 900.degree. C. into a steel strip and coiling the hot rolled strip; and cold-rolling the hot-rolled strip into a cold-rolled strip, followed by annealing the cold-rolled strip.
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公开(公告)号：US5108521A
公开(公告)日：1992-04-28
申请号：US747381
申请日：1991-08-20
CPC分类号： C21D8/1222 , C21D8/1272
摘要： For enabling the manufacture of non-oriented steel strips by HDR, the amounts of AlN and MnS which precipitate on the way of HDR are decreased to such a level that they do not affect the magnetic properties by regulating the Al and S contents, and further unavoidable precipitating nitrides are precipitated as coarse BN. With regard to the steel composition, the amounts of C, Si and P are not only regulated, but also the amounts of Mn, Al, S and N are regulated from the above standpoint, and a proper amount of B is added if required. In addition, in regard to treatment conditions, in order to secure necessary finishing and coiling temperatures, the lower limit of the slab temperature at the starting time of HDR is specified. Moreover, to secure precipitation of BN and recrystallization of a ferrite structure, the lower limits of the finishing and coiling temperatures are specified. Furthermore, to secure the magnetic properties after cold rolling, the strips are finally continuously annealed at the determined temperature.
摘要翻译： 为了能够通过HDR制造未取向钢带，在HDR路径上沉淀的AlN和MnS的量降低到通过调节Al和S含量而不影响磁性的水平，进一步 不可避免的沉淀氮化物作为粗大BN沉淀。 关于钢组成，C，Si和P的量不仅受到限制，而且从上述观点考虑，调节Mn，Al，S和N的量，如果需要，则添加适量的B。 此外，关于处理条件，为了确保必要的精加工和卷取温度，规定了在HDR的开始时刻的板坯温度的下限。 此外，为了确保BN的析出和铁素体结构的再结晶，规定了精加工和卷取温度的下限。 此外，为了确保冷轧后的磁性能，最终在确定的温度下连续退火。
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4.发明授权Method of making non-oriented electrical steel sheets having excellent magnetic properties 失效制造具有优异磁性的非定向电工钢板的制造方法
公开(公告)号：US5164024A
公开(公告)日：1992-11-17
申请号：US476507
申请日：1990-06-13
CPC分类号： C21D8/1222 , C21D8/1261 , C21D8/1277
摘要： A method of producing non-oriented electrical steel sheets having excellent magnetic properties which comprehends heating a steel at the low temperature for hot rolling, thereby to minimize re-solution of AlN particles when a slab is cooled, so that coarsening of AlN particles is facilitated during annealing the hot rolled sheet; and coiling at low temperatures for controlling the amount of scale generation. De-scaling is perfectly accomplished after the hot rolling, and the hot rolled sheet is annealed in a non-annealing atmosphere, thereby to control the oxidation and the nitriding to a minimum during annealing the hot rolled sheet, and the annealing conditions of the hot rolled sheet are specified for proper coarsening of the cohesion, taking into consideration the magnetic properties and the economics.
摘要翻译： PCT No.PCT / JP89 / 00439 Sec。 371日期1990年6月13日 102（e）日期1990年6月13日PCT 1989年4月26日PCT公布。 WO90 / 12896 PCT出版物 日本1990年11月1日。一种制造具有优异磁性的无取向电工钢板的方法，其包括在低温下对钢进行热轧，从而使板坯冷却时AlN颗粒的再溶解最小化 在热轧板退火期间，AlN颗粒的粗化变得容易; 并在低温下卷取以控制氧化皮的产生量。 在热轧后完全脱模，热轧板在非退火气氛中进行退火，从而在热轧板退火时控制氧化和氮化至最小，热轧退火条件 考虑到磁性和经济性，轧制板被规定为适当的内聚力粗化。
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公开(公告)号：US5074930A
公开(公告)日：1991-12-24
申请号：US477840
申请日：1990-04-06
CPC分类号： C21D8/1261 , C21D8/1205 , C21D8/1222
摘要： This invention is to save the energy by heating a slab at high temperature for producing non-oriented electrical steel sheets having excellent magnetic properties uniform over the full length thereof, without carrying out a long soaking, for which a continuously cast slab having a specified chemical composition is heated at a high temperature, and a heat cycle is then defined such that the slab is passed twice nearly around precipitation noses, thereby to coarse the AIN precipitates over the full length of the slab, and the slab is annealed under a specified condition after the hot rolling so that AlN is coarsened and the ferrite grains recrystallize and grow.
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6.发明授权
公开(公告)号：US5009726A
公开(公告)日：1991-04-23
申请号：US427128
申请日：1989-10-12
CPC分类号： C21D8/1222 , C21D8/1261
摘要： The present invention is to produce non-oriented silicon steel sheets having excellent magnetic properties in dependence upon a hot direct rolling, wherein the slab is directly sent to the direct rolling without maintaining the heat and soaking, whereby others than AlN precipitated during hot rolling check the precipitation of AlN, and a delay time is taken between the roughing and the finish rolling so that precipitating nuclei of AlN are introduced into the steel, and uniform and coarse AlN precipitation is formed by a subsequent annealing treatment, thereby to enable to provide uniform and satisfied ferrite grain growth at the recrystallization annealing.
摘要翻译： PCT No.PCT / JP89 / 00232 Sec。 371日期：1989年10月12日 102（e）日期1989年10月12日PCT 1989年3月3日PCT公布。 出版物WO89 / 08151 日本1989年9月8日。本发明是根据热直接轧制制造具有优异磁性的无取向硅钢板，其中将板坯直接送入直接轧制而不保持热和浸泡，其他 在热轧过程中AlN析出后，检测出AlN的沉淀，粗加工与精轧之间延迟时间延长，使AlN的析出核导入钢中，通过后续退火处理形成均匀且粗大的AlN析出 从而能够在再结晶退火时提供均匀且满足的铁素体晶粒生长。
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公开(公告)号：US5169457A
公开(公告)日：1992-12-08
申请号：US432740
申请日：1989-10-17
CPC分类号： C21D8/1222 , C21D8/1261
摘要： A steel slab containing not more than 0.005 wt % carbon, 1.0 to 4.0 wt % silicon, 0.1 to 1.0 wt % manganese, not more than 0.1 wt % phosphorus, not more than 0.005 wt % sulfur, and 0.1 to 2.0 wt % aluminum is directly sent to a hot rolling step without brief soaking, whereby Al and N are made soluble with respect to species other than AlN inevitably precipitated during hot rolling, and uniform and coarse AlN precipitation is formed by a subsequent annealing treatment in which the hot rolled plate is soaked at a temperature of 800.degree. to 1000.degree. C. for a period of time t defined as exp (-0.018T+19.4) .ltoreq.t.ltoreq.exp (-0.022T+25.4) wherein T is the soaking temperature (.degree.C.) and t is the soaking time (minutes). Uniform and satisfactory ferrite grain growth at the recrystallization annealing is provided thereby.
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8.发明授权Method of making non-oriented electrical steel sheets having excellent magnetic properties 失效制造具有优异磁性的非定向电工钢板的制造方法
公开(公告)号：US5116436A
公开(公告)日：1992-05-26
申请号：US476508
申请日：1990-06-13
CPC分类号： C21D8/1222
摘要： Non-oriented electrical steel sheets having excellent magnetic properties are produced by carrying out a coiling at a low temperature for monitoring the amount of scale generation; de-scaling after hot rolling; and annealing the de-scaled hot rolled sheet in a non-oxidizing atmosphere to thereby minimize the oxidation and nitriding during annealing the hot rolled sheet. By determining a higher heating temperature for hot rolling, a magnetic property (magnetic flux density) is improved, and the hot rolled sheet is subjected to an open coil-annealing and annealing conditions therefor are specified in order to perfectly precipitate re-solute AlN particles by this heating and fully coarsen AlN particles.
摘要翻译： PCT No.PCT / JP89 / 00440 Sec。 371日期1990年6月13日 102（e）日期1990年6月13日PCT 1989年4月26日PCT公布。 WO90 / 12897 PCT出版物 1990年11月1日。通过在低温下进行卷取来制造具有优异磁性的非取向电工钢板，用于监测规模生成量; 热轧后去垢; 并在非氧化性气氛中退火脱鳞热轧板，从而使热轧板退火时的氧化和氮化最小化。 通过确定用于热轧的较高的加热温度，提高了磁性（磁通密度），并且对热轧板进行开放的线圈退火和规定退火条件以便完全沉淀再溶质AlN颗粒 通过这种加热和完全粗化的AlN颗粒。
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公开(公告)号：US5061321A
公开(公告)日：1991-10-29
申请号：US425179
申请日：1989-10-12
CPC分类号： C23G1/08
摘要： The present invention provides a pickling method for electrical steel bands having excellent surface properties without requiring any especial treatment and increasing costs, where the pickling conditions of the hot rolled steel band are optimized not only in view of de-scaling properties but also interglanular corrosions, and the pickling is performed with hydrochloric acid for a period of a specified time determined by Si content of steel, temperature and HCl concentration of a pickling liquid.
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公开(公告)号：US5102478A
公开(公告)日：1992-04-07
申请号：US748180
申请日：1991-08-20
CPC分类号： C21D8/1244 , C21D8/1222 , C21D8/1261 , C21D8/1272
摘要： For enabling the making of non-oriented magnetic steel strips by direct rolling, the amounts of AlN and MnS which precipitate on the way of the direct rolling are decreased to such a level that they do not affect the magnetic properties by regulting the Al and S amounts, and further unavoidable precipitating nitrides are precipitated coarsely as BN. With regard to the steel composition, the amount of C, Si and P are not only regulated, but also the amounts of Mn, Al, S and N are regulated from the above standpoint, and a proper amount of B is added if required. In addition, in regard to treatment conditions, in order to secure necessary finishing and coiling temperatures, the lower limit of the slab temperature at the starting time of the direct rolling is specified. Moreover, to promote refining of ferrite, the upper limit of the finishing temperature is specified, and also to prevent non-uniform recrystallization after coiling, the upper limit of the coiling temperature is specified. Furthermore, to secure satisfied magnetic properties, the annealing of the hot rolled strip is performed under specific conditions determined by a soaking temperature and a soaking time. In addition, to secure the magnetic properties of the cold rolled strip, the strip is finally continuously annealed at determined temperatures.
摘要翻译： 为了通过直接轧制制造无取向磁钢带，在直接轧制过程中沉淀的AlN和MnS的量减少到这样的水平，即它们不会通过抛光Al和S而影响磁性能 量，进一步不可避免的析出氮化物粗大地析出为BN。 关于钢组成，C，Si和P的量不仅受到限制，而且从上述观点考虑，调节Mn，Al，S和N的量，如果需要，则添加适量的B。 此外，关于处理条件，为了确保必要的精加工和卷取温度，规定了在直接轧制的起始时刻的板坯温度的下限。 此外，为了促进铁素体的精制，规定了终轧温度的上限，并且为了防止卷取后的不均匀的再结晶，规定了卷取温度的上限。 此外，为了确保满足的磁特性，热轧带材的退火在由均热温度和均热时间确定的特定条件下进行。 另外，为了确保冷轧带材的磁特性，最终在确定的温度下连续退火。
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