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    METHOD FOR MANUFACTURING GRAIN ORIENTED SILICON STEEL WITH SINGLE COLD ROLLING
    5.
    发明公开
    METHOD FOR MANUFACTURING GRAIN ORIENTED SILICON STEEL WITH SINGLE COLD ROLLING 审中-公开
    VERFAHREN ZUR HERSTELLUNG VON KORNORIENTIERTEM SILICIUMSTAHL MIT EINEM EINZIGEN WARMWALZEN

    公开(公告)号：EP2390373A1

    公开(公告)日：2011-11-30

    申请号：EP09836084.5

    申请日：2009-12-31

    申请人： Baoshan Iron & Steel Co., Ltd.

    发明人： LI, Guobao ,  ZHANG, Pijun ,  YANG, Yongjie ,  SHEN, Kanyi ,  HU, Zhuochao ,  WU, Peiwen ,  JIN, Weizhong ,  JIANG, Quanli

    IPC分类号： C21D8/12 ,  C22C38/02

    CPC分类号： C21D8/12 ,  B21B1/36 ,  B21B3/00 ,  B21B9/00 ,  C21D1/28 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/14775

    摘要： The invention provides a method for producing grain-oriented silicon steel with single cold rolling, comprising: 1) smelting, refining and continuous casting to obtain a casting blank; 2) hot rolling; 3) normalization, i.e, normalizing annealing and cooling; 4) cold-rolling, i.e. single cold rolling at a cold rolling reduction rate of 75-92%; 5) decarburizing annealing at 780-880°C for 80-350s in a protective atmosphere having a due point of 40-80°C, wherein the total oxygen [O] in the surface of the decarburized sheet: 171/t≤ [O]≤ 313/t (t represents the actual thickness of the steel sheet in mm), the amount of absorbed nitrogen: 2-10ppm; 6) high temperature annealing, wherein the dew point of the protective atmosphere: 0-50°C, the temperature holding time at the first stage: 6-30h, the amount of absorbed nitrogen during high-temperature annealing: 10-40ppm; 7) hot-leveling annealing. The invention may control the primary recrystallization microstructure of steel sheet effectively by controlling the normalization process of hot rolled sheet to form sufficient favorable (Al, Si)N inclusions from nitrogen absorbed by slab during decarburizing annealing and low-temperature holding of high-temperature annealing, facilitating the generation of stable, perfect secondary recrystallization microstructure of the final products. In addition, the invention avoids the impact of nitridation using ammonia on the underlying layer in prior art, and thus the formation of a good glass film underlying layer is favored.

    摘要翻译： 本发明提供了一种单次冷轧生产晶粒取向硅钢的方法，包括：1）冶炼，精炼和连续铸造，得到铸坯; 2）热轧; 3）归一化，即归一化退火和冷却; 4）冷轧，即以75-92％的冷轧压下率进行单次冷轧; 5）在适当点为40-80℃的保护气氛中，在780-880℃下脱碳退火80-350s，其中脱碳片表面的总氧[O]为：171 / t‰[ O]‰³313 / t（t表示钢板的实际厚度，单位为mm），吸附氮量为2-10ppm; 6）高温退火，其中保护气氛的露点为0-50℃，第一阶段的保温时间为6-30h，高温退火时氮吸附量为10-40ppm; 7）热水平退火。 本发明可以通过控制热轧板的归一化过程来控制钢板的一次再结晶显微组织，从而在脱碳退火和低温保持高温退火过程中从板坯吸收的氮形成足够有利的（Al，Si）N夹杂物 ，促进了最终产品的稳定，完美的二次再结晶微观结构的产生。 此外，本发明避免了使用氨氮在现有技术中对下层的影响，因此有利于形成良好的玻璃膜下层。

    A METHOD OF MANUFACTURING ORIENTED SI STEEL CONTAINING CU
    6.
    发明公开
    A METHOD OF MANUFACTURING ORIENTED SI STEEL CONTAINING CU 有权
    VERFAHREN ZUR HERSTELLUNG VON ORIENTIERTEM CU-HALTIGEN SI-STAHL

    公开(公告)号：EP2322674A1

    公开(公告)日：2011-05-18

    申请号：EP09804456.3

    申请日：2009-04-24

    申请人： Baoshan Iron & Steel Co., Ltd.

    发明人： JI, Yaming ,  SUN, Huande ,  YANG, Guohua ,  YANG, Yongjie ,  XU, Yunpeng ,  HUANG, Changguo ,  LI, Guobao

    IPC分类号： C21D8/12 ,  C22C38/16

    CPC分类号： C22C38/04 ,  C21D1/26 ,  C21D6/008 ,  C21D8/02 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1266 ,  C21D8/1283 ,  C21D10/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/16

    摘要： A method of manufacturing oriented Si steel containing Cu with high electric-magnetic property comprises: hot rolling slab; after first cold rolling, heating it to 800°C or higher temperature and performing intermediate decarburization annealing in a protective atmosphere with P H2O /P H2 of 0.50∼0.88 for 3-8 minutes, to decrease carbon content of the steel plate to less than 30ppm; then peening and acid-pickling to remove oxide of Fe on surface and to control oxygen content to lower than 500ppm; secondary cold rolling to final thickness and coating separation agent in water-slurry form; drying to decrease water content to lower than 1.5%; high-temperature annealing in a protective atmosphere containing hydrogen with oxidation degree (P H2O /P H2 ) of 0.0001-0.2; finally applying a tension coating and leveling tension annealing.

    摘要翻译： 含有具有高电磁性能的Cu的取向Si钢的方法包括：热轧板; 第一次冷轧后，将其加热到800℃以上，在保护气氛中进行中间脱碳退火，P H2O / P H2为0.50〜0.88，3-8分钟，使钢板的碳含量降低 超过30ppm; 然后进行喷丸和酸洗以除去表面上的Fe的氧化物，并控制氧含量低于500ppm; 二次冷轧至最终厚度，涂层分离剂为水浆形式; 干燥以降低含水量至1.5％以下; 在含氢氧化程度（P H2O / P H2）为0.0001-0.2的保护气氛中进行高温退火; 最后应用张力涂层和流平张力退火。

    LOW-MAGNETOSTRICTIVE ORIENTED SILICON STEEL AND MANUFACTURING METHOD THEREFOR
    7.
    发明公开
    LOW-MAGNETOSTRICTIVE ORIENTED SILICON STEEL AND MANUFACTURING METHOD THEREFOR 审中-公开

    公开(公告)号：EP4261853A1

    公开(公告)日：2023-10-18

    申请号：EP22736629.1

    申请日：2022-01-11

    申请人： BAOSHAN IRON & STEEL CO., LTD.

    发明人： WU, Meihong ,  LI, Guobao ,  CHU, Shuangjie ,  ZHAO, Zipeng ,  LIU, Baojun ,  SHEN, Kanyi ,  YANG, Yongjie ,  HU, Zhuochao ,  JI, Yaming ,  LING, Chen

    IPC分类号： H01F1/18 ,  B23K26/362 ,  C21D1/26 ,  C21D6/00 ,  C21D8/12 ,  C21D9/00 ,  C22C38/02

    摘要： A manufacturing method for low-magnetostrictive oriented silicon steel is provided, wherein the oriented silicon steel comprises a silicon steel substrate and an insulating coating on the surface of the silicon steel substrate. The manufacturing method comprises: performing single-sided laser etching on the silicon steel substrate, wherein the side of the silicon steel substrate, on which single-sided laser etching is performed, is a first surface, and the side opposite to the first surface is a second surface; determining a deflection difference between the first surface and the second surface based on the power of the laser etching, and determining a difference in the amount of the insulating coatings on the first surface and the second surface based on the deflection difference; and forming insulating coatings on the first surface and the second surface. The amount of the insulating coating on the second surface is greater than that on the first surface, and the amount of the insulating coating on the first surface and that on the second surface satisfy the difference in the amount of the insulating coatings. By using the manufacturing method in the present invention, the problem of a relatively large magnetostrictive deviation between two sides of oriented silicon steel caused by single-sided laser etching can be solved. Oriented silicon steel manufactured by the aforementioned manufacturing method is also provided. A transformer iron core prepared using the oriented silicon steel enables a transformer to have low noise during operation.

    MANUFACTURING METHOD FOR HIGH SILICON GRAIN ORIENTED ELECTRICAL STEEL SHEET
    8.
    发明公开
    MANUFACTURING METHOD FOR HIGH SILICON GRAIN ORIENTED ELECTRICAL STEEL SHEET 审中-公开

    公开(公告)号：EP3763834A1

    公开(公告)日：2021-01-13

    申请号：EP19775425.2

    申请日：2019-03-25

    申请人： BAOSHAN IRON & STEEL CO., LTD.

    发明人： ZHANG, Huabing ,  CHU, Shuangjie ,  LI, Guobao ,  XIAO, Wen ,  LIU, Baojun ,  YANG, Yongjie ,  SHEN, Kanyi ,  HAN, Dan ,  HU, Zhining

    IPC分类号： C21D8/12 ,  C23C24/04

    摘要： Disclosed is a manufacturing method for a high silicon grain oriented electrical steel sheet, the silicon content of the high silicon grain oriented electrical steel is greater than 4wt%, comprising the steps of: (1) performing decarburization annealing of a cold-rolled steel plate; (2) allowing high silicon alloy particles in a completely solid state to collide at a high speed with the surface of the decarburization annealed steel plate to be sprayed, thus forming a high silicon alloy coating on the surface of the steel plate to be sprayed; (3) coating a release agent and drying; and (4) annealing. The manufacturing method for the high silicon grain oriented electrical steel sheet of the present invention is inexpensive, and, the high silicon grain oriented electrical steel sheet produced is of stable quality and is provided with great magnetic performance.