公开(公告)号：US20200291501A1

公开(公告)日：2020-09-17

申请号：US16650074

申请日：2018-05-16

申请人： BAOSHAN IRON & STEEL CO., LTD.

发明人： Huabing ZHANG ,  Guobao LI ,  Baojun LIU ,  Dan HAN ,  Xinqiang ZHANG ,  Guanghua CUI ,  Jianbing CHEN ,  Wen XIAO ,  Zipeng ZHAO

IPC分类号： C21D11/00 ,  B21B1/22 ,  C22C38/34 ,  C22C38/28 ,  C22C38/24 ,  C22C38/06 ,  C22C38/00 ,  C22C38/04 ,  C21D9/52 ,  C21D6/00

摘要： An apparatus and a method for rapidly heating cold-rolled strip steel (10). The apparatus for rapidly heating cold-rolled strip steel (10) comprises a heating zone, a soaking zone, and a cooling zone, and the heating zone is sequentially divided into a first heating section (1), a second heating section (2), a third heating section (3), and a fourth heating section (4) along a moving direction of the strip steel (10) to be heated, the first heating section (1) and the fourth heating section (4) being radiant heating sections, and the second heating section (2) and the third heating section (3) being inductive heating sections. The method for rapidly heating cold-rolled strip steel (10) uses the apparatus for rapidly heating cold-rolled strip steel (10) to heat the strip steel (10).

公开(公告)号：US20220275470A1

公开(公告)日：2022-09-01

申请号：US17631693

申请日：2020-08-11

申请人： BAOSHAN IRON & STEEL CO., LTD.

发明人： Huabing ZHANG ,  Guobao LI ,  Kanyi SHEN ,  Baojun LIU ,  Changjun HOU ,  Xinqiang ZHANG ,  Jianbing CHEN ,  Meihong WU ,  Changsong MA ,  Desheng LIU

IPC分类号： C21D9/46 ,  C21D8/12 ,  C22C38/26 ,  C22C38/20 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147 ,  H01F41/02

摘要： Disclosed is a high-magnetic-induction oriented silicon steel, wherein the chemical elements thereof are, in mass percentage: Si: 2.0-4.0%; C: 0.03-0.07%; Al: 0.015-0.035%; N: 0.003-0.010%; Nb: 0.0010-0.0500%, the balance being Fe and inevitable impurities. The manufacturing method for the high-magnetic-induction oriented silicon steel includes the steps of: (1) smelting and casting; (2) heating a slab; (3) hot rolling; (4) cold rolling; (5) decarbonizing and annealing; (6) nitriding treatment; (7) applying an MgO coating; (8) high temperature annealing; and (9) applying an insulating coating; wherein a high-magnetic-induction oriented silicon steel is obtained by the manufacturing method, having an average primary grain size of 14-22 μm and a primary grain size variation coefficient of higher than 1.8; and wherein the ⁢ ⁢ primary ⁢ ⁢ grain ⁢ ⁢ size ⁢ ⁢ variation ⁢ ⁢ coefficient = the ⁢ ⁢ average ⁢ ⁢ primary grain ⁢ ⁢ size standard ⁢ ⁢ deviation ⁢ ⁢ of ⁢ ⁢ a primary ⁢ ⁢ grain ⁢ ⁢ size .