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1. 发明公开

EP4137603A1 LOW-COST NON-ORIENTED ELECTRICAL STEEL PLATE WITH EXTREMELY LOW ALUMINUM CONTENT, AND PREPARATION METHOD THEREFOR 审中-实审
公开(公告)号：EP4137603A1
公开(公告)日：2023-02-22
申请号：EP21813476.5
申请日：2021-05-25
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： ZHANG, Feng , SHEN, Kanyi , ZONG, Zhenyu , LI, Guobao , FANG, Xianshi
IPC分类号： C22C38/02 , C22C38/04 , C21D8/12 , C21D1/74 , C21C7/06 , C21D1/26
摘要： Disclosed is a low-cost non-oriented electrical steel plate with an extremely low aluminum content, which plate comprises the following chemical elements in percentage by mass: 0.003% or less of C, 0.1%-1.2% of Si, 0.1%-0.4% of Mn, 0.01%-0.2% of P, 0.003% or less of S, 0.001% or less of Al, 0.003%-0.01% of O, 0.003% or less of N, and 0.005%-0.05% of Sn, with the condition Si 2 /P: 0.89-26.04 being satisfied. In addition, further disclosed is a method for manufacturing the non-oriented electrical steel plate. The method comprises steps of (1) smelting; (2) continuous casting; (3) hot rolling: wherein a hot rolled plate is subjected to soaking and heat preservation by means of residual heat of hot rolled steel coils, rather than being subjected to normalizing treatment or cover furnace annealing after coiling; (4) primary cold rolling; and (5) continuous annealing. In the non-oriented electrical steel plate of the present invention, reasonable chemical ingredients and process designs are used, and the non-oriented electrical steel plate not only has excellent economy, but also has the properties of high magnetic induction and low iron loss.

2. 发明公开

EP3767225A1 METHOD AND SYSTEM FOR MEASURING THICKNESS OF COATING OF STEEL PLATE 有权
公开(公告)号：EP3767225A1
公开(公告)日：2021-01-20
申请号：EP19774217.4
申请日：2019-03-29
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： ZHANG, Huabing , XIAO, Wen , LI, Guobao , LIU, Baojun , SUN, Wenxuan , ZHANG, Xinqiang , HAN, Dan , CUI, Guanghua , LIU, Ningjiang
IPC分类号： G01B11/06
摘要： Disclosed is a method for measuring the coating thickness of steel plate, comprising the following steps: measuring the outer diameter R and the inner diameter R 0 of the coil with coating, and obtaining the coating thickness T coating based on T coating = π 4 R 2 − R 0 2 / L − T strip ; wherein the outer diameter R, the inner diameter R 0 , the strip length L, the strip thickness T strip , and the coating thickness T coating are in the same unit. Also disclosed is a measuring system used in the method for measuring the coating thickness of steel plate, comprising steel strip thickness measuring device for measuring the thickness T strip of the strip prior to coating application, which is disposed upstream of the coating device along the running direction of the strip; strip length measuring device for measuring the length L of the strip that forms coil; coil size measuring device for measuring the outer diameter and the inner diameter R 0 of a coil; controlling device, which is respectively connected to the strip thickness measuring device, the strip length measuring device and the coil size measuring device, to receive the data transmitted by above measuring device, and calculate and output the coating thickness T coating .

3. 发明公开

EP3725908A1 ORIENTED SILICON STEEL AND MANUFACTURING METHOD THEREOF 审中-公开
公开(公告)号：EP3725908A1
公开(公告)日：2020-10-21
申请号：EP20178527.6
申请日：2012-12-11
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： YANG, Guohua , LIU, Xiandong , LI, Guobao , YANG, Yongjie , HU, Zhuochao , HEI, Hongxu , ZHANG, Jun , SU, Dejun , SUN, Huande , WU, Meihong
IPC分类号： C22C38/02 , C21D8/12 , C21D3/04 , C21D6/00 , C21D9/46 , C23C8/02 , C23C8/26 , C22C38/00 , C22C38/06 , H01F1/147 , H01F1/16 , H01F1/18 , H01F41/02 , H01F41/32 , C22C38/04 , C21D1/26 , C23C8/80
摘要： The invention discloses an oriented silicon steel with excellent magnetic properties and a manufacturing method thereof. The present invention obtains the oriented silicon steel with excellent magnetic properties by controlling the area ratio of small crystal grains of D

4. 发明公开

EP3604565A1 LASER-ETCHED GRAIN-ORIENTED SILICON STEEL RESISTANT TO STRESS RELIEF/ANNEALING AND MANUFACTURING METHOD THEREFOR 审中-公开
公开(公告)号：EP3604565A1
公开(公告)日：2020-02-05
申请号：EP18774249.9
申请日：2018-01-24
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： ZHAO, Zipeng , LI, Guobao , YANG, Yongjie , WU, Meihong , MA, Changsong , JI, Yaming , LING, Chen , XIE, Weiyong , GUO, Jianguo
IPC分类号： C21D8/12
摘要： A laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and a manufacturing method therefor. Parallel linear grooves (20) are formed on one or both sides of grain-oriented silicon steel (10) by laser etching. The linear grooves (20) are perpendicular to, or at an angle to, the rolling direction of the steel plate. A maximum height of edge protrusions of the linear grooves (20) does not exceed 5 µm, and a maximum height of spatters in etch-free regions between adjacent linear grooves (20) does not exceed 5 µm, and the proportion of an area occupied by spatters in the vicinity of the linear grooves (20) does not exceed 5%. The steel has low manufacturing costs, and the etching effect of the finished steel is retained during a stress-relief annealing process. The steel is suitable for manufacturing of wound iron core transformers.

5. 发明授权

EP2891728B1 HIGH MAGNETIC INDUCTION ORIENTED SILICON STEEL AND MANUFACTURING METHOD THEREOF 有权
公开(公告)号：EP2891728B1
公开(公告)日：2019-10-16
申请号：EP12883627.7
申请日：2012-12-11
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： ZHANG, Huabing , LI, Guobao , LU, Xijiang , YANG, Yongjie , HU, Zhuochao , SHEN, Kanyi , GAO, Jiaqiang , WU, Meihong
IPC分类号： C22C38/34 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/28 , C22C38/60 , C22C38/22 , C22C38/26 , C21D6/00 , C21D8/12 , C21D1/26 , C21D3/04 , H01F1/18

6. 发明授权

EP2518169B1 METHOD OF FAST LASER SCRIBING 有权
公开(公告)号：EP2518169B1
公开(公告)日：2019-01-23
申请号：EP11843749.0
申请日：2011-04-28
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： HUANG, Wangya , LI, Guobao , ZHANG, Xinqiang , MAO, Xing , GUO, Wanqing , ZHU, Jianru , XIANG, Banglin
IPC分类号： C21D8/12 , B23K26/00

7. 发明授权

EP2902507B1 MANUFACTURING METHOD OF COMMON GRAIN-ORIENTED SILICON STEEL WITH HIGH MAGNETIC INDUCTION 有权
公开(公告)号：EP2902507B1
公开(公告)日：2018-11-28
申请号：EP12885574.9
申请日：2012-12-11
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： SHEN, Kanyi , LI, Guobao , CHU, Shuangjie , SUN, Yezhong , ZHANG, Huabing , YANG, Yongjie , HU, Zhuochao , ZHAO, Bin , XU, Qi , HUANG, Jie , ZHANG, Peili
IPC分类号： C21D8/12 , C22C38/04 , H01F1/16
CPC分类号： H01F41/02 , C21D3/04 , C21D6/008 , C21D8/12 , C21D8/1205 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D8/1277 , C21D8/1283 , C21D2201/05 , C22C38/001 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C23C8/26 , H01F1/14783 , H01F1/14791 , H01F1/18 , H01F41/32
摘要： A manufacturing method of oriented silicon steel with magnetic induction B8 of not less than 1.88T, comprising the following steps: 1) smelting and continuously casting to obtain a slab, wherein the content of N is controlled at 0.002-0.014wt% in the smelting stage; 2) hot-rolling; 3) cold-rolling; 4) decarbonizing and annealing; 5) nitriding treatment, wherein infiltrated nitrogen content [N] D is controlled to satisfy the formula: 328-0.14a-0.85b-2.33c‰¤[N] D ‰¤362-0.16a-0.94b-2.57c, wherein a is the content of Als in the smelting step, with the unit of ppm; b is the content of N element, with the unit of ppm; and c is primary grains size, with the unit of µm; 6) coating a surface with a magnesium oxide coating and annealing; and 7) applying an insulating coating.

8. 发明授权

EP2272995B1 A MANUFACTURING METHOD OF ORIENTED SI STEEL WITH HIGH ELECTRIC-MAGNETIC PROPERTY 有权
标题翻译：制造方法取向硅钢具有高的电，磁感式
公开(公告)号：EP2272995B1
公开(公告)日：2012-09-05
申请号：EP09725052.6
申请日：2009-03-25
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： YANG, Guohua , SUN, Huande , JI, Yaming , LI, Guobao , HEI, Hongxu
IPC分类号： C21D1/26 , C21D8/12 , C21D6/00 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , B21B1/24 , C22C38/16 , C21D3/04 , C21D8/02
CPC分类号： C22C38/02 , C21D1/26 , C21D3/04 , C21D6/008 , C21D8/02 , C21D8/0278 , C21D8/0284 , C21D8/12 , C21D8/1233 , C21D8/1255 , C21D8/1266 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/16

9. 发明授权

EP2644715B1 MANUFACTURE METHOD OF ORIENTED SILICON STEEL HAVING GOOD MAGNETIC PERFORMANCE 有权
标题翻译：一种具有良好磁性能的取向硅钢的制造方法
公开(公告)号：EP2644715B1
公开(公告)日：2018-04-25
申请号：EP11842864.8
申请日：2011-04-28
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： WU, Meihong , JIN, Weizhong , SUN, Huande , YANG, Guohua , SHEN, Kanyi , HUANG, Jie , HU, Deyang , LI, Guobao
IPC分类号： C21D8/12 , B21B37/48
CPC分类号： C21D8/12 , C21D8/1244 , C21D8/1272 , C21D8/1277 , C21D8/1283 , C21D2201/05 , C21D2211/008
摘要： A method for manufacturing a grain-oriented silicon steel having excellent magnetic performance, comprising steps as follows 1) conventionally melting and casting into a steel blank; 2) heating the steel blank and hot rolling the same into a strip of steel; 3)normalizing process; carrying out the normalizing process having two stages, wherein the strip is firstly heated to 1100ˆ¼1200°C, then cooled to 900ˆ¼1000 °C within 50-200s; and next, the strip is rapidly cooled in water having a temperature of 10ˆ¼100; in this period, a tension force is applied to the strip of steel, the strip of steel in the temperature range of 900°Cˆ¼500°C has a stress of 1ˆ¼200N/mm 2 ; 4)cold rolling, i.e. carrying out a primary cold rolling, or a double cold rolling with intermediate annealing; 5)carrying out primary recrystallizing annealing, then coating an annealing separator, whose main composition is MgO, to carry out final product annealing comprising secondary recrystallizing annealing and purifying annealing. The invention optimizes the content and distribution of martensite in the steel plate after normalization by adjusting the tension force applied to the steel plate while normalization transformation, so as to make the content of martensite in the range ensuring a better magnetic performance of the final product and to optimize the magnetic performance of final products.

10. 发明公开

EP2390373A1 METHOD FOR MANUFACTURING GRAIN ORIENTED SILICON STEEL WITH SINGLE COLD ROLLING 有权
标题翻译： 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。

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