公开(公告)号：US20160196909A1

公开(公告)日：2016-07-07

申请号：US14915708

申请日：2014-09-25

Applicant: JFE STEEL CORPORATION

Inventor： Masanori TAKENAKA ,  Takeshi IMAMURA ,  Yasuyuki HAYAKAWA ,  Yukihiro SHINGAKI

IPC: H01F1/16 ,  C22C38/46 ,  C22C38/44 ,  C22C38/34 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C21D1/34 ,  C23C8/26 ,  C22C38/60

CPC classification number: H01F1/16 ,  C21D1/34 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C22C38/44 ,  C22C38/46 ,  C22C38/60 ,  C23C8/26

Abstract: Provides is a method of producing a grain oriented electrical steel sheet by heating a steel slab having a predetermined composition, then subjecting the slab to hot rolling to obtain a hot rolled sheet, then optionally subjecting the hot rolled sheet to hot band annealing and subsequent cold rolling once, or twice or more with intermediate annealing performed therebetween to obtain a cold rolled sheet with final sheet thickness, then subjecting the cold rolled sheet to primary recrystallization annealing and subsequent secondary recrystallization annealing, in which the aging index AI of the steel sheet before final cold rolling is set to 70 MPa or less to effectively grow Goss-oriented grains to thereby obtain a grain-oriented electrical steel sheet with good magnetic properties, without the restriction of containing a relatively large amount of C.

Abstract translation: 提供一种通过对具有规定成分的钢板进行加热来制造晶粒取向电工钢板的方法，然后对板坯进行热轧，得到热轧板，然后任意地对热轧板进行热带退火和随后的冷轧 在其间进行中间退火，轧制一次或两次以上，得到具有最终板厚的冷轧板，然后对冷轧板进行一次再结晶退火和随后的二次再结晶退火，其中钢板的老化指数AI 最终冷轧设定为70MPa以下，有效地生长Goss取向晶粒，从而获得具有良好磁特性的晶粒取向电工钢板，不受含有相对大量C的限制。

公开(公告)号：US20250163551A1

公开(公告)日：2025-05-22

申请号：US18835348

申请日：2023-02-16

Applicant: JFE STEEL CORPORATION

Inventor： Takeshi IMAMURA ,  Ayaka YOSHIKAWA ,  Hiroi YAMAGUCHI

IPC: C22C38/02 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60

Abstract: We propose a method of producing a grain-oriented electrical steel sheet having improved magnetic flux density in material using an inhibitor. For a steel slab having a defined chemical composition, the temperature at the end of rough rolling by hot rolling and the time from the end of rough rolling to the start of finishing rolling satisfy a defined relationship, and time to reach 900° C. from 600° C. is 50 s or less.

公开(公告)号：US20230045475A1

公开(公告)日：2023-02-09

申请号：US17938047

申请日：2022-10-05

Applicant: JFE STEEL CORPORATION

Inventor： Yasuyuki HAYAKAWA ,  Masanori TAKENAKA ,  Takeshi IMAMURA

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C22C38/02 ,  H01F1/16 ,  C21D8/00 ,  C22C38/08 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/34 ,  H01F1/147

Abstract: Provided is a method for manufacturing a grain-oriented electrical steel sheet. A steel slab having a specific chemical composition is heated and hot rolled. A hot-rolled steel sheet thus obtained is subjected to hot band annealing to obtain a cold-rolled steel sheet, which is then subjected to primary recrystallization annealing to obtain a primary recrystallized steel sheet. An annealing separator is applied to the primary recrystallized steel sheet, which is then coiled. The coil is subjected to secondary recrystallization annealing to obtain a grain-oriented electrical steel sheet having an average value of a deviation angle (α2+β2)1/2 calculated from a deviation angle α from ideal Goss orientation around an ND rotation axis and a deviation angle β from ideal Goss orientation around a TD rotation axis of 4.5° or less, and an area ratio Rβ of crystal grains with β≤0.50° of 15% or less.

公开(公告)号：US20200370153A1

公开(公告)日：2020-11-26

申请号：US16957723

申请日：2018-12-27

Applicant: JFE STEEL CORPORATION

Inventor： Takeshi IMAMURA ,  Makoto WATANABE

IPC: C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/00 ,  C21D8/12

Abstract: Disclosed is a grain-oriented electrical steel sheet that has excellent high-frequency iron loss properties and blanking workability. The steel sheet includes: steel components including, by mass %, Si: 1.5-8.0%, Mn: 0.02-1.0%, and at least one selected from Sn: 0.010-0.400%, Sb: 0.010-0.400%, Mo: 0.010-0.200%, and P: 0.010-0.200%; and crystal grains including coarse secondary recrystallized grains having an average grain size of 5 mm or more and fine grains having a grain size of 0.1-2.0 mm, wherein at least some of the coarse secondary recrystallized grains penetrate the steel sheet in a thickness direction and are respectively exposed on front and back surfaces of the steel sheet such that projection planes of the exposed surfaces of these coarse secondary recrystallized grains on the front and back surfaces form an overlapping region, and the fine grains are present at a number density per unit area of 0.6-40 pieces/cm2.

公开(公告)号：US20190233914A1

公开(公告)日：2019-08-01

申请号：US16333729

申请日：2017-09-21

Applicant: JFE STEEL CORPORATION

Inventor： Yasuyuki HAYAKAWA ,  Masanori TAKENAKA ,  Takeshi IMAMURA

IPC: C21D9/46 ,  C22C38/60 ,  C22C38/34 ,  C22C38/26 ,  C22C38/22 ,  C22C38/20 ,  C22C38/14 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  H01F1/147

CPC classification number: C21D9/46 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1238 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/34 ,  C22C38/60 ,  C22C2202/02 ,  H01F1/147 ,  H01F1/16 ,  Y02P10/212

Abstract: Provided is a grain-oriented electrical steel sheet that has excellent magnetic properties and can be manufactured by secondary recrystallization orientation control using coil annealing with high productivity. A grain-oriented electrical steel sheet comprises a specific chemical composition, wherein an average value of a deviation angle (α2+β2)1/2 calculated from a deviation angle α from ideal Goss orientation around an ND rotation axis and a deviation angle β from ideal Goss orientation around a TD rotation axis is 5.0° or less, and an area ratio Rβ of crystal grains with β≤0.50° is 20% or less.

公开(公告)号：US20170240988A1

公开(公告)日：2017-08-24

申请号：US15519909

申请日：2015-10-30

Applicant: JFE STEEL CORPORATION

Inventor： Takeshi IMAMURA ,  Yasuyuki HAYAKAWA ,  Masanori TAKENAKA

IPC: C21D9/46 ,  C22C38/34 ,  C22C38/20 ,  C22C38/12 ,  H01F1/147 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C22C38/60 ,  C22C38/08

CPC classification number: C21D9/46 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/20 ,  C22C38/34 ,  C22C38/60 ,  H01F1/14775 ,  H01F1/16

Abstract: A steel slab having a composition not containing an inhibitor component further contains, in mass %, at least one selected from: Sn: 0.010% to 0.200%; Sb: 0.010% to 0.200%; Mo: 0.010% to 0.150%; and P: 0.010% to 0.150%, and annealing that satisfies a relationship Td≧Tf is performed, where Td (° C.) is a highest temperature at which the steel sheet is annealed in decarburization annealing and Tf (° C.) is a highest temperature before secondary recrystallization of the steel sheet starts in final annealing. Thus, a grain-oriented electrical steel sheet with significantly reduced magnetic property scattering in a coil is obtained without using an inhibitor component.

公开(公告)号：US20160319390A1

公开(公告)日：2016-11-03

申请号：US15208720

申请日：2016-07-13

Applicant: JFE STEEL CORPORATION

Inventor： Takeshi IMAMURA ,  Yukihiro SHINGAKI ,  Makoto WATANABE ,  Ryuichi SUEHIRO ,  Toshito TAKAMIYA

IPC: C21D9/46 ,  C21D6/00 ,  C22C38/60 ,  C22C38/40 ,  C22C38/00 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/12 ,  C22C38/16

CPC classification number: C21D9/46 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/34 ,  C22C38/40 ,  C22C38/60 ,  H01F1/14775 ,  H01F1/16

Abstract: In a method for producing a grain-oriented electrical steel sheet by including a series of steps of hot rolling a raw steel material containing C: 0.002-0.10 mass %, Si: 2.0-8.0 mass % and Mn: 0.005-1.0 mass % to obtain a hot rolled sheet, subjecting the hot rolled steel sheet after or without hot band annealing to one stage cold rolling or two or more stage cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to decarburization annealing combined with primary recrystallization annealing, applying an annealing separator to the steel sheet surface, and then subjecting to a final annealing.

Abstract translation: 在通过以下步骤的制造方向，其特征在于，包括将C：0.002〜0.10质量％，Si：2.0〜8.0质量％，Mn：0.005〜1.0质量％的粗钢材热轧的工序， 得到热轧板，在热轧带钢退火后进行一次冷轧，或者对其进行中间退火的两台以上的阶段冷轧，得到最终板厚的冷轧板，对冷轧 轧制板与脱碳退火结合一次再结晶退火，在钢板表面上涂布退火分离剂，然后进行最终退火。