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    Method for production of non-oriented electrical steel strip
    1.
    发明授权
    Method for production of non-oriented electrical steel strip 有权
    无取向电工钢带的生产方法

    公开(公告)号：US07377986B2

    公开(公告)日：2008-05-27

    申请号：US11494369

    申请日：2006-07-27

    申请人： Jerry W. Schoen ,  Robert J. Comstock, Jr.

    发明人： Jerry W. Schoen ,  Robert J. Comstock, Jr.

    IPC分类号： H01F1/147 ,  H01F1/16

    CPC分类号： C21D8/1222 ,  C21D8/1205 ,  C21D8/1233 ,  C21D8/1272 ,  H01F1/16

    摘要： The present invention relates to a method for producing a non-oriented electrical steel with improved magnetic properties and improved resistance to ridging, brittleness, nozzle clogging and magnetic aging. The chromium bearing steel is produced from a steel melt which is cast as a thin slab or conventional slab, cooled, hot rolled and/or cold rolled into a finished strip. The finished strip is further subjected to at least one annealing treatment wherein the magnetic properties are developed, making the steel sheet of the present invention suitable for use in electrical machinery such as motors or transformers.

    摘要翻译： 本发明涉及一种具有改善的磁特性和改进的抗皱纹，脆性，喷嘴堵塞和磁老化的无取向电工钢的制造方法。 铬轴承钢由铸造成薄板坯或常规板坯的钢熔体制成，冷却，热轧和/或冷轧成成品条。 成品条进一步进行至少一个退火处理，其中磁特性被开发，使得本发明的钢板适用于电动机或变压器等电机。

    High permeability grain oriented electrical steel
    3.
    发明授权
    High permeability grain oriented electrical steel 有权
    高磁导率晶粒取向电工钢

    公开(公告)号：US07887645B1

    公开(公告)日：2011-02-15

    申请号：US09847236

    申请日：2001-05-02

    申请人： Jerry W. Schoen ,  Norris A. Dahlstrom ,  Robert J. Comstock, Jr.

    发明人： Jerry W. Schoen ,  Norris A. Dahlstrom ,  Robert J. Comstock, Jr.

    IPC分类号： H01F1/147 ,  H01F1/18

    CPC分类号： C22C38/008 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C21D8/1294 ,  C21D2211/001 ,  C21D2211/005 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44

    摘要： The present invention provides a method of producing a high permeability grain oriented electrical steel having excellent mechanical and magnetic properties. A hot band having a thickness of about 1.5 to about 4.0 mm has a chemistry comprising about 2.5 to about 4.5% silicon, about 0.1 to about 1.2% chromium, about 0.02 to about 0.08% carbon, about 0.01 to about 0.05% aluminum, up to about 0.1% sulfur, up to about 0.14% selenium, about 0.03 to about 0.15% manganese, up to about 0.2% tin, up to about 1% copper, and balance being essentially iron and residual elements, all percentages by weight. The band has a volume resistivity of at least about 45 μΩ-cm, an austenite volume fraction (γ1150° C.) of at least 20% and the strip has an isomorphic layer thickness of at least about 2% of the total thickness on at least one surface of the hot processed band. The band is rapidly cooled after the anneal prior to cold rolling at a rate of at least 30° C./second from 875-950° C. to a temperature below 400° C. The band is cold reduced in one or more stages with a final reduction of at least 80%, annealed, decarburized and coated with an annealing separator on at least one side. A final annealing provides stable secondary grain growth and a permeability measured at 796 A/m of at least 1840.

    摘要翻译： 本发明提供一种具有优异的机械和磁特性的高磁导率晶粒取向电工钢的制造方法。 厚度为约1.5至约4.0mm的热带具有包括约2.5至约4.5％的硅，约0.1至约1.2％的铬，约0.02至约0.08％的碳，约0.01至约0.05％的铝，上升的化学 至约0.1％的硫，至多约0.14％的硒，约0.03至约0.15％的锰，至多约0.2％的锡，至多约1％的铜，余量基本上为铁和残余元素，所有重量百分比。 该带具有至少约45μΩ·cmgr·cm的体积电阻率，至少为20％的奥氏体体积分数（γ1150℃），并且该条带具有至少约2％的总厚度的同形层厚度 热处理带的至少一个表面。 在冷轧后，将带材在冷却后以至少30℃/秒从875-950℃至低于400℃的温度被快速冷却。该带在一个或多个阶段中被冷还原， 至少80％的最终还原，退火，脱碳并在至少一侧上用退火分离剂涂覆。 最终退火提供稳定的二次晶粒生长和在796A / m至少1840测量的渗透性。