公开(公告)号：US10991494B2

公开(公告)日：2021-04-27

申请号：US16495976

申请日：2017-06-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takashi Morohoshi ,  Masafumi Miyazaki

IPC: H01F1/147 ,  C22C38/44 ,  C22C38/38 ,  C22C38/06 ,  C22C38/34

Abstract: When a Si content (mass %) is set to [Si], an Al content (mass %) is set to [Al], and a Mn content (mass %) is set to [Mn], a parameter Q represented by “Q=[Si]+2[Al]−[Mn]” is 2.00 or more, the total mass of S contained in sulfides or oxysulfides of Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, or Cd is 40% or more of the total mass of S contained in a non-oriented electrical steel sheet, a {100} crystal orientation intensity is 3.0 or more, a thickness is 0.15 mm to 0.30 mm, and an average crystal grain diameter is 65 μm to 100 μm.

公开(公告)号：US11459632B2

公开(公告)日：2022-10-04

申请号：US16771533

申请日：2019-02-15

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takeaki Wakisaka ,  Takashi Morohoshi ,  Masafumi Miyazaki

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/147

Abstract: A non-oriented electrical steel sheet according to one embodiment of the invention has a chemical composition represented by C: 0.0030% or less, Si: 2.00% or less, Al: 1.00% or less, Mn: 0.10% to 2.00%, S: 0.0030% or less, one or more selected from the group consisting of Mg, Ca, Sr, Ba, Nd, Pr, La, Ce, Zn, and Cd: 0.0015% to 0.0100% in total, a parameter Q represented by Q=[Si]+2×[Al]−[Mn]: 2.00 or less; Sn: 0.00% to 0.40%, Cu: 0.00% to 1.00%, and a remainder: Fe and impurities, and a parameter R represented by R=(I100+I310+I411+I521)/(I111+I211+I332+I221) is 0.80 or greater.

公开(公告)号：US10968503B2

公开(公告)日：2021-04-06

申请号：US16495993

申请日：2017-06-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takashi Morohoshi ,  Masafumi Miyazaki

IPC: C22C38/38 ,  C22C38/20 ,  C22C38/34 ,  C22C38/06

Abstract: When a Si content (mass %) is set to [Si], an Al content (mass %) is set to [Al], and a Mn content (mass %) is set to [Mn], a parameter Q represented by “Q=[Si]+2[Al]−[Mn]” is 2.00 or more, the total mass of S contained in sulfides or oxysulfides of Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, or Cd is 10% or more of the total mass of S contained in a non-oriented electrical steel sheet, a {100} crystal orientation intensity is 3.0 or more, a thickness is 0.15 mm to 0.30 mm, and an average crystal grain diameter is 65 μm to 100 μm.

公开(公告)号：US11566303B2

公开(公告)日：2023-01-31

申请号：US16958097

申请日：2019-02-15

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takeaki Wakisaka ,  Masafumi Miyazaki ,  Takashi Morohoshi

IPC: C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147

Abstract: A non-oriented electrical steel sheet according to one embodiment of the invention has a chemical composition represented by C: 0.0030% or less, Si: 2.00% or less, Al: 1.00% or less, Mn: 0.10% to 2.00%, S: 0.0030% or less, one or more selected from the group consisting of Mg, Ca, Sr, Ba, Nd, Pr, La, Ce, Zn, and Cd: 0.0003% or greater and less than 0.0015% in total, a parameter Q represented by Q=[Si]+2×[Al]−[Mn]: 2.00 or less; Sn: 0.00% to 0.40%, Cu: 0.00% to 1.00%, and a remainder: Fe and impurities, and a parameter R represented by R−(I100+I310+I411+I521)/(I111+I211+I332+I221) is 0.80 or greater.

公开(公告)号：US11021771B2

公开(公告)日：2021-06-01

申请号：US16470078

申请日：2018-01-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyoshi Yashiki ,  Yoshiaki Natori ,  Kazutoshi Takeda ,  Susumu Mukawa ,  Takuya Matsumoto ,  Koji Fujita ,  Takashi Morohoshi ,  Masafumi Miyazaki

IPC: C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C22C38/60 ,  C22C38/14 ,  C22C38/06 ,  C22C38/00 ,  H01F1/16 ,  C22C38/04

Abstract: A non-oriented electrical steel sheet contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.0% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, O: 0.0110% to 0.0350%, Sn: 0% to 0.050%, Sb: 0% to 0.050%, Ti: more than 0% and 0.0050% or less, and a remainder including Fe and impurities, in which Sn+Sb: 0.050% or less, Si−0.5×Mn: 2.0% or more, and an O content in a sheet thickness central portion excluding a surface layer portion which is a range from a front surface and a rear surface to a position of 10 μm in a depth direction is less than 0.0100%.

公开(公告)号：US10995393B2

公开(公告)日：2021-05-04

申请号：US16496328

申请日：2017-06-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takashi Morohoshi ,  Masafumi Miyazaki

IPC: H01F1/147 ,  C22C38/44 ,  C22C38/38 ,  C22C38/06 ,  C22C38/20

Abstract: When a Si content (mass %) is set to [Si], an Al content (mass %) is set to [Al], and a Mn content (mass %) is set to [Mn], a parameter Q represented by “Q=[Si]+2[Al]−[Mn]” is 2.00 or more, the total mass of S contained in sulfides or oxysulfides of Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, or Cd is 40% or more of the total mass of S contained in a non-oriented electrical steel sheet, a {100} crystal orientation intensity is 3.0 or more, a thickness is 0.15 mm to 0.30 mm, and an average crystal grain diameter is 65 μm to 100 μm.

公开(公告)号：US11469018B2

公开(公告)日：2022-10-11

申请号：US16957313

申请日：2019-02-15

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takeaki Wakisaka ,  Masafumi Miyazaki ,  Takashi Morohoshi

IPC: C21D9/46 ,  H01F1/147 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16

Abstract: A non-oriented electrical steel sheet according to one embodiment of the invention has a chemical composition represented by C: 0.0030% or less, Si: 2.00% or less, Al: 1.00% or less, Mn: 0.10% to 2.00%, S: 0.0030% or less, one or more selected from the group consisting of Mg, Ca, Sr, Ba, Nd, Pr, La, Ce, Zn, and Cd: greater than 0.0100% and not greater than 0.0250% in total, a parameter Q represented by Q=[Si]+2×[Al]−[Mn]: 2.00 or less; Sn: 0.00% to 0.40%, Cu: 0.00% to 1.00%, and a remainder: Fe and impurities, and a parameter R represented by R=(I100+I310+I411+I521)/(I111+I211+I332+I221) is 0.80 or greater.

公开(公告)号：US11053574B2

公开(公告)日：2021-07-06

申请号：US16470122

申请日：2018-01-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyoshi Yashiki ,  Yoshiaki Natori ,  Kazutoshi Takeda ,  Susumu Mukawa ,  Takuya Matsumoto ,  Koji Fujita ,  Takashi Morohoshi ,  Masafumi Miyazaki

IPC: C22C38/60 ,  C22C38/00 ,  C22C38/14 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  H01F1/147

Abstract: A non-oriented electrical steel sheet according to an aspect of the present invention contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.2% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, one or more of La, Ce, Pr, and Nd: 0.0005% to 0.0200% in total, Ca: 0.0005% to 0.0100%, Ti: 0.0005% to 0.0100%, Sn: 0% to 0.10%, Sb: 0% to 0.10%, Mg: 0% to 0.0100%, and a remainder including Fe and impurities, in which Si−0.5×Mn: 2.0% or more, and Si+0.5×Mn: 3.8% or more.