公开(公告)号：US12091721B2

公开(公告)日：2024-09-17

申请号：US17280474

申请日：2019-09-27

申请人： POSCO

发明人： Jae-Hoon Kim ,  Yong-Soo Kim ,  Su-Yong Shin

IPC分类号： C21D9/46 ,  C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/147

CPC分类号： C21D9/46 ,  C21D6/005 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/147 ,  C21D2201/05 ,  C22C2202/02

摘要： The present invention relates to a non-grain-oriented electrical steel sheet which is excellent in high-frequency iron loss, and a manufacturing method thereof.
A non-grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 2.5 to 3.8 wt % of Si, 0.5 to 2.5 wt % of Al, 0.2 to 4.5 wt % of Mn, 0.0005 to 0.02 wt % of As, 0.0005 to 0.01 wt % of Bi, the balance Fe, and inevitable impurities, and satisfies the following [Equation 1].

0.3≤[surface fine crystal grain diameter]×[fine grain formation thickness]×([As]/[Bi])≤5.0  [Equation 1]

In Equation 1, [surface fine crystal grain diameter] means an average particle diameter (μm) of fine crystal grains in an electrode surface layer of an electrical steel sheet, [fine grain formation thickness] means a thickness (mm) of an electrode surface layer in which fine crystal grains are formed, and [As] and [Bi] mean a composition (wt %) of As and a composition (wt %) of Bi, respectively.

公开(公告)号：US20240242863A1

公开(公告)日：2024-07-18

申请号：US18288286

申请日：2022-12-20

申请人： POSCO Co., Ltd

发明人： Hyung Don Joo ,  Jaewan Hong ,  Yong-Soo Kim ,  Junesoo Park ,  Yunsu Kim

IPC分类号： H01F1/147 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16 ,  C22C38/60

CPC分类号： H01F1/14783 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1277 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16 ,  C22C38/60 ,  C22C2202/02

摘要： A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention contains, by wt %: 0.005% or less (excluding 0%) of C, 1.5 to 3.0% of Si, 0.4 to 1.5% of Mn, 0.005% or less (excluding 0%) of S, 0.0001 to 0.7% of Al, 0.005% or less (excluding 0%) of N, 0.005% or less (excluding 0%) of Ti, 0.001 to 0.02% of Cu, 0.01 to 0.05% of Sb, 0.001 to 0.1% of Sn, and 0.005 to 0.07% of P, wherein contents of Mn, Si, and Al satisfy the following [Expression 1], contents of Sb, Sn, and P satisfy the following [Expression 2], the non-oriented electrical steel sheet contains a balance of Fe and unavoidably incorporated impurities, and the number of (Mn, Cu)S precipitates of 0.5 μm or less per area is 1/μm3 or less:







0.19
≤


[
Mn
]

/

(


[
Si
]

+

150
×

[
Al
]



)


≤
0.35




[

Expression
⁢

1

]













1
/

2
*

⁢
Sn

公开(公告)号：US11492678B2

公开(公告)日：2022-11-08

申请号：US16957977

申请日：2018-05-17

申请人： POSCO

发明人： Jae-Hoon Kim ,  Yong-Soo Kim ,  Jung-Woo Kim ,  Su-Yong Shin

IPC分类号： C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C21D8/12 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34

摘要： A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes, by weight %, Si: 2.5 to 6.0%, Al: 0.2 to 3.5%, Mn: 0.2 to 4.5%, Cr: 0.01 to 0.2%, P: 0.005 to 0.08%, Mg: 0.0005 to 0.05%, and a remainder including Fe and inevitable impurities, while satisfying Equation 1 below, and formed with an inner oxidation layer of a 0.2 to 5 μm thickness inside a base steel sheet. −2.5≤[P]/[Cr]−[Mg]×100≤6.5  [Equation 1] (In Equation 1, [P], [Cr], and [Mg] respectively represent a content (by wt %) of P, Cr, and Mg).

公开(公告)号：US20200332387A1

公开(公告)日：2020-10-22

申请号：US16957977

申请日：2018-05-17

申请人： POSCO

发明人： Jae-Hoon Kim ,  Yong-Soo Kim ,  Jung-Woo Kim ,  Su-Yong Shin

IPC分类号： C21D9/46 ,  C21D8/02 ,  C21D8/12 ,  C21D6/00 ,  C22C38/34 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00

摘要： A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes, by weight %, Si: 2.5 to 6.0%, Al: 0.2 to 3.5%, Mn: 0.2 to 4.5%, Cr: 0.01 to 0.2%, P: 0.005 to 0.08%, Mg: 0.0005 to 0.05%, and a remainder including Fe and inevitable impurities, while satisfying Equation 1 below, and formed with an inner oxidation layer of a 0.2 to 5 μm thickness inside a base steel sheet. −2.5≤[P]/[Cr]−[Mg]×100≤6.5  [Equation 1] (In Equation 1, [P], [Cr], and [Mg] respectively represent a content (by wt %) of P, Cr, and Mg.)

公开(公告)号：US20150000793A1

公开(公告)日：2015-01-01

申请号：US14368651

申请日：2012-12-28

申请人： POSCO

发明人： Junesoo Park ,  Byung-Keun Bae ,  Yong-Soo Kim ,  Su-Yong Sin

IPC分类号： H01F1/147 ,  C22C38/60 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/12 ,  C22C38/14

CPC分类号： H01F1/14775 ,  C21D8/1233 ,  C21D8/1261 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/60 ,  H01F1/16

摘要： Disclosed are a non-oriented electrical steel sheet and a method of manufacturing the same. The non-oriented electrical steel sheet of the present invention includes 0.005 wt % or less of C, 1.0-4.0 wt % of Si, 0.1-0.8 wt % of Al, 0.01-0.1 wt % of Mn, 0.02-0.3 wt % of P, 0.005 wt % or less of N. 0.001-0.005 wt % of S, 0.005 wt % or less of Ti, 0.01-0.2 wt % of at least one of Sn and Sb, and the remainder including Fe and other impurities unavoidably added thereto, wherein Mn, Al, P, and S may respectively fulfill the empirical formula 0.8≦{[Mn]/(100*[S])+[Al]}/[P]≦40, wherein [Mn], [Al], [P], and [S] respectively refer to weight percentages of Mn, Al, P, and S.

摘要翻译： 公开了一种无取向电工钢板及其制造方法。 本发明的无方向性电磁钢板包括C：0.005重量％以下，Si：1.0-4.0重量％，Al：0.1〜0.8重量％，Mn：0.01〜0.1重量％，Mn：0.02〜0.3重量％ P，0.005重量％以下的N，0.001-0.005重量％的S，0.005重量％以下的Ti，0.01-0.2重量％的Sn和Sb中的至少一种，余量包括Fe和其他不可避免的杂质 其中Mn，Al，P和S可以分别满足经验公式0.8＆nlE; {[Mn] /（100 * [S]）+ [Al]} / [P]＆nlE; 40，其中[Mn] [Al]，[P]和[S]分别是指Mn，Al，P和S的重量百分比。

公开(公告)号：US11773463B2

公开(公告)日：2023-10-03

申请号：US16957834

申请日：2018-05-16

申请人： POSCO

发明人： Jae-Hoon Kim ,  Wonjin Kim ,  Yong-Soo Kim ,  Su-Yong Shin

IPC分类号： C22C38/06 ,  C21D9/46 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  H01F1/147

CPC分类号： C21D9/46 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/147

摘要： A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes at least one of 2.0 to 3.5% of Si, 0.3 to 3.5% of Al, 0.2 to 4.5% of Mn, 0.0030 to 0.2% of Sn, 0.0030 to 0.15% of Sb, 0.0040 to 0.18% of P, 0.0005 to 0.02% of Zn, and 0.0005 to 0.01% of Y for wt %, a remainder of Fe, and inevitable impurities, and satisfying Formula 1:

0.05≤([Sn]+[Sb])/[P]≤25  [Formula 1]

(here, [Sn], [Sb], and [P] represent contents (wt %) of Sn, Sb, and P.)

公开(公告)号：US11408041B2

公开(公告)日：2022-08-09

申请号：US16957930

申请日：2018-05-16

申请人： POSCO

发明人： Hun Ju Lee ,  Yong-Soo Kim ,  Su-Yong Shin

IPC分类号： C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/60

摘要： A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 2.0 to 4.0% of Si, 0.05 to 1.5% of Al, 0.05 to 2.5% of Mn, equal to or less than 0.005% of C (excluding 0%), equal to or less than 0.005% of N (excluding 0%), 0.001 to 0.1% of Sn, 0.001 to 0.1% of Sb, 0.001 to 0.1% of P, 0.001 to 0.01% of As, 0.0005 to 0.01% of Se, 0.0005 to 0.01% of Pb, 0.0005 to 0.01% of Bi, a remainder of Fe, and inevitable impurities, as wt %, wherein a Taylor factor (M) of each crystal grain included in a steel sheet is expressed in Formula 1, and an average Taylor factor value of the steel sheet is equal to or less than 2.75: M = σ τ CRSS [ Formula ⁢ ⁢ 1 ] (here, σ is a macro stress, and τCRSS is a critical resolved shear stress).

公开(公告)号：US20210355558A1

公开(公告)日：2021-11-18

申请号：US17280474

申请日：2019-09-27

申请人： POSCO

发明人： Jae-Hoon Kim ,  Yong-Soo Kim ,  Su-Yong Shin

IPC分类号： C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147

摘要： The present invention relates to a non-grain-oriented electrical steel sheet which is excellent in high-frequency iron loss, and a manufacturing method thereof.
A non-grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 2.5 to 3.8 wt % of Si, 0.5 to 2.5 wt % of Al, 0.2 to 4.5 wt % of Mn, 0.0005 to 0.02 wt % of As, 0.0005 to 0.01 wt % of Bi, the balance Fe, and inevitable impurities, and satisfies the following [Equation 1]. 0.3≤[surface fine crystal grain diameter]×[fine grain formation thickness]×([As]/[Bi])≤5.0  [Equation 1] In Equation 1, [surface fine crystal grain diameter] means an average particle diameter (μm) of fine crystal grains in an electrode surface layer of an electrical steel sheet, [fine grain formation thickness] means a thickness (mm) of an electrode surface layer in which fine crystal grains are formed, and [As] and [Bi] mean a composition (wt %) of As and a composition (wt %) of Bi, respectively.

公开(公告)号：US20210062281A1

公开(公告)日：2021-03-04

申请号：US16957930

申请日：2018-05-16

申请人： POSCO

发明人： Hun Ju Lee ,  Yong-Soo Kim ,  Su-Yong Shin

IPC分类号： C21D6/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/00 ,  C22C38/60 ,  C22C38/12 ,  C22C38/14 ,  C21D8/12

摘要： A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 2.0 to 4.0% of Si, 0.05 to 1.5% of Al, 0.05 to 2.5% of Mn, equal to or less than 0.005% of C (excluding 0%), equal to or less than 0.005% of N (excluding 0%), 0.001 to 0.1% of Sn, 0.001 to 0.1% of Sb, 0.001 to 0.1% of P, 0.001 to 0.01% of As, 0.0005 to 0.01% of Se, 0.0005 to 0.01% of Pb, 0.0005 to 0.01% of Bi, a remainder of Fe, and inevitable impurities, as wt %, wherein a Taylor factor (M) of each crystal grain included in a steel sheet is expressed in Formula 1, and an average Taylor factor value of the steel sheet is equal to or less than 2.75: M = σ τ CRSS [ Formula   1 ] (here, σ is a macro stress, and τCRSS is a critical resolved shear stress.)

公开(公告)号：US20220033940A1

公开(公告)日：2022-02-03

申请号：US17280376

申请日：2019-05-23

申请人： POSCO

发明人： Jae-Song Kim ,  Seung Il Kim ,  Jae Kim ,  Su-Yong Shin ,  Yong-Soo Kim

IPC分类号： C22C38/38 ,  C22C38/28 ,  C22C38/20 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C21D8/02 ,  C21D9/46

摘要： A non-oriented electrical steel sheet according to an embodiment of the present invention includes: in wt %, C at 0.004 wt % or less (excluding 0 wt %), Si at 2.5 to 4.0 wt %, P at 0.1 wt % or less (excluding 0 wt %), Al at 0.3 to 2.0 wt %, N at 0.003 wt % or less (excluding 0 wt %), S at 0.003 wt % or less (excluding 0 wt %), Mn at 0.15 to 2.5 wt %, Cr at 0.5 wt % (excluding 0 wt %), and the balance including Fe and other impurities unavoidably added thereto; satisfies the following Equation 1; and has an average grain size of 20 μm or less. [Mn]≥1450×[S]−0.8  [Equation 1] (In Equation 1, [Mn] and [S] represent a content (wt %) of Mn and S, respectively.)