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.

公开(公告)号：EP3719160A1

公开(公告)日：2020-10-07

申请号：EP18884597.8

申请日：2018-07-11

申请人： Baoshan Iron & Steel Co., Ltd.

发明人： ZHANG, Feng ,  LV, Xuejun ,  WANG, Bo ,  LIU, Baojun ,  ZONG, Zhenyu ,  SHEN, Kanyi ,  SUN, Yezhong

IPC分类号： C22C38/02 ,  C21D8/02

摘要： Disclosed are a non-oriented electrical steel sheet with excellent magnetic properties and a manufacturing method thereof, wherein the mass percentage of the chemical components thereof are: C: 0-0.005%; Si: 2.1-3.2%, Mn: 0.2-1.0%, P: 0-0.2%, Al: 0.2-1.6%, N: 0-0.005%, Ti: 0-0.005%, Cu: 0-0.2%, and the balance of Fe and inevitable impurities; and at the same time, (the S content for forming MnS + the S content for forming Cu x S)/the S content in the steel is required to be less than or equal to 0.2. The process for manufacturing the non-oriented electrical steel sheet of the present invention is simple and convenient, the chemical components of the steel are easy to control, the manufacturing process is stable, and the technical requirements are easy to realize.

公开(公告)号：EP3533895A1

公开(公告)日：2019-09-04

申请号：EP17864354.0

申请日：2017-10-26

申请人： Baoshan Iron & Steel Co., Ltd.

发明人： LV, Xuejun ,  ZHANG, Feng ,  ZONG, Zhenyu ,  SONG, Yanli ,  CHEN, Lingyun ,  WANG, Bo ,  XIE, Shishu

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

摘要： A non-oriented electrical steel having excellent magnetic properties, the chemical elements thereof in percentage by mass being: Si: 0.2-1.5%, Mn: 0.01-0.30%, Al: 0.001-0.009%, O: 0.005-0.02%, C≤0.005%, S≤0.005%, N≤0.005%, and Ti≤0.002%, the remainder being Fe and other unavoidable impurities, and Al/Si≤0.006 and Mn/Si≤0.2. The method for producing comprises the following sequence of steps: (1) smelting; (2) hot rolling: the slab heating temperature being 850°C to 1250°C, and the final rolling temperature being 800-1050°C; (3) acid pickling; (4) cold rolling; (5) annealing: the annealing plate temperature being controlled between 620°C-900°C; and (6) coating.