公开(公告)号：US20220263095A1

公开(公告)日：2022-08-18

申请号：US17624568

申请日：2020-06-29

Applicant: JFE STEEL CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takayoshi YANO ,  Shin ISHIKAWA ,  Akio MITSUI

IPC: H01M4/66 ,  C22C38/18 ,  C23F1/44 ,  C25F1/06

Abstract: Provided is a ferritic stainless steel sheet for current collectors for sulfide-based solid-state batteries, which has excellent sulfidation resistance and adhesiveness. The ferritic stainless steel sheet has a component composition containing Cr in an amount of 16% by mass or more, wherein the surface of the ferritic stainless steel sheet has an uneven structure having recessed portions and projecting portions, the average height of the projecting portions is 20 to 50 nm inclusive, the average distance between the projecting portions is 20 to 200 nm inclusive, and the [Cr]/[Fe], i.e., the ratio of the atom concentration of Cr that is present in a form other than the metal form to the atom concentration of Fe that is present in a form other than the metal form, on the surface of the ferritic stainless steel sheet is 1.0 or more.

公开(公告)号：US20200227760A1

公开(公告)日：2020-07-16

申请号：US16483147

申请日：2018-01-25

Applicant: JFE STEEL CORPORATION

Inventor： Takayoshi YANO ,  Shin ISHIKAWA

IPC: H01M8/021 ,  C22C38/18 ,  C21D6/00 ,  C21D1/76

Abstract: A substrate stainless steel sheet has [chemical form other than metal (Cr+Fe)]/[metal form (Cr+Fe)] of 12.0 or more and 200 or less, [chemical form other than metal (Cr+Fe)]/[metal form (Cr+Fe)] being a ratio of a total of Cr and Fe existing in chemical form other than metal to a total of Cr and Fe existing in metal form at a substrate stainless steel sheet surface.

公开(公告)号：US20190119775A1

公开(公告)日：2019-04-25

申请号：US16090649

申请日：2017-03-09

Applicant: JFE STEEL CORPORATION

Inventor： Tetsuyuki NAKAMURA ,  Shin ISHIKAWA ,  Chikara KAMI

IPC: C21D9/46 ,  C22C38/54 ,  C22C38/52 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00

Abstract: A martensitic stainless steel has a chemical composition containing, by mass %, C: 0.030% or more and less than 0.20%, Si: 0.01% or more and 2.0% or less, Mn: 0.01% or more and 3.0% or less, P: 0.050% or less , S: 0.010% or less, Cr: 10.0% or more and 16.0% or less, Ni: 0.01% or more and 0.80% or less, Al: 0.001% or more and 0.50% or less, Zr: 0.005% or more and 0.50% or less, and N: 0.030% or more and less than 0.20%, with the balance consisting of Fe and inevitable impurities.

公开(公告)号：US20180175401A1

公开(公告)日：2018-06-21

申请号：US15579666

申请日：2016-07-29

Applicant: JFE STEEL CORPORATION

Inventor： Takayoshi YANO ,  Shin ISHIKAWA ,  Chikara KAMI

IPC: H01M8/0228 ,  H01M8/1018 ,  H01M8/0206 ,  H01M8/0215

Abstract: A metal sheet for separators of polymer electrolyte fuel cells comprises: a substrate made of metal; and a surface-coating layer with which a surface of the substrate is coated, with a strike layer in between, wherein a coating ratio of the strike layer on the substrate is 2% to 70%, the strike layer is distributed in a form of islands, and a maximum diameter of the islands of the strike layer as coating portions is 1.00 μm or less and is not greater than a thickness of the surface-coating layer.

公开(公告)号：US20210032731A1

公开(公告)日：2021-02-04

申请号：US16966711

申请日：2019-01-25

Applicant: JFE STEEL CORPORATION

Inventor： Tetsuyuki NAKAMURA ,  Shin ISHIKAWA ,  Reiko SUGIHARA

IPC: C22C38/42 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/60 ,  C22C38/54 ,  C21D8/00

Abstract: A ferritic stainless steel having excellent creep resistance and thermal fatigue resistance. The ferritic stainless steel has a chemical composition comprising, by mass %, C: 0.020% or less, Si: 0.1 to 1.0%, Mn: 0.05 to 0.60%, P: 0.050% or less, S: 0.008% or less, Ni: 0.02 to 0.60%, Al: 0.001 to 0.25%, Cr: 18.0 to 20.0%, Nb: 0.30 to 0.80%, Mo: 1.80 to 2.50%, N: 0.015% or less, Sb: 0.002 to 0.50%, and the balance being Fe and inevitable impurities. The expression Nb+Mo: 2.3 to 3.0% is satisfied, where Nb and Mo in the expression represent the contents, by mass %, of the respective elements.

公开(公告)号：US20190264298A1

公开(公告)日：2019-08-29

申请号：US16341450

申请日：2017-10-06

Applicant: JFE STEEL CORPORATION

Inventor： Tetsuyuki NAKAMURA ,  Shin ISHIKAWA ,  Reiko SUGIHARA

IPC: C21D9/46 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00 ,  C22C38/52

Abstract: A martensitic stainless steel sheet comprises a chemical composition containing, in mass %, C: 0.035% to 0.090%, Si: 0.01% to 1.0%, Mn: 0.01% to 0.90%, P: 0.050% or less, S: 0.050% or less, Cr: 10.0% to 14.0%, Ni: 0.01% to 0.40%, Al: 0.001% to 0.50%, V: 0.05% to 0.50%, and N: 0.050% to 0.20%, with the balance being Fe and inevitable impurities, wherein a content of C and a content of N in the chemical composition satisfy C %+N % 0.10% and N % C %, the number of precipitates with a major axis length of 200 nm or more in a surface layer of the martensitic stainless steel sheet is 25 or less per 100 μm2, and the martensitic stainless steel sheet has a tensile strength of 1300 MPa or more, a proof stress of 1100 MPa or more, and an elongation of 8.0% or more.

公开(公告)号：US20170062843A1

公开(公告)日：2017-03-02

申请号：US15352266

申请日：2016-11-15

Applicant: JFE STEEL CORPORATION

Inventor： Masayasu NAGOSHI ,  Shinsuke IDE ,  Shin ISHIKAWA ,  Noriko MAKIISHI

IPC: H01M8/021 ,  C22C38/48 ,  C22C38/44 ,  C22C38/42 ,  G01R27/20 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01M8/0265 ,  H01M8/0254 ,  C22C38/50 ,  C22C38/06

CPC classification number: H01M8/021 ,  C21D6/004 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  G01R27/205 ,  H01M8/0254 ,  H01M8/0265 ,  H01M2008/1095 ,  Y02E60/50

Abstract: A stainless steel having a low surface contact resistance for fuel cell separators is provided. The stainless steel has a Cr content of 16 to 40 mass % or more. The stainless steel includes a region having a fine textured structure on its surface, and the area percentage of the region is 50% or more, preferably 80% or more. The region having a fine textured structure is a region which has a structure having depressed portions and raised portions at an average interval between depressed portions or raised portions of 20 nm or more and 150 nm or less when observed with a scanning electron microscope.

Abstract translation: 提供了一种燃料电池隔板具有低表面接触电阻的不锈钢。 不锈钢的Cr含量为16〜40质量％以上。 不锈钢表面具有细纹理结构的区域，该区域的面积百分比为50％以上，优选为80％以上。 具有细纹理结构的区域是当用扫描电子显微镜观察时，具有凹陷部分和凸起部分之间的平均间隔为20nm以上且150nm以下的结构的区域。

公开(公告)号：US20200340126A1

公开(公告)日：2020-10-29

申请号：US16489881

申请日：2018-04-02

Applicant: JFE STEEL CORPORATION

Inventor： Takayoshi YANO ,  Shin ISHIKAWA

IPC: C23F17/00 ,  C23F1/28 ,  C25F1/06 ,  H01M8/021 ,  H01M8/0247 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

Abstract: A stainless steel sheet for fuel cell separators comprises a predetermined chemical composition, wherein the stainless steel sheet has a textured structure at a surface thereof, an average interval between projected parts of the textured structure being 20 nm or more and 200 nm or less, and a ratio [Cr]/[Fe] of an atomic concentration of Cr existing in chemical form other than metal to an atomic concentration of Fe existing in chemical form other than metal at the surface of the stainless steel sheet is 2.0 or more.

公开(公告)号：US20190296369A1

公开(公告)日：2019-09-26

申请号：US16307238

申请日：2017-05-22

Applicant: JFE STEEL CORPORATION

Inventor： Takayoshi YANO ,  Shin ISHIKAWA

IPC: H01M8/021 ,  H01M8/0254 ,  H01M8/1006 ,  C22C38/50

Abstract: A stainless steel sheet for fuel cell separators comprises: a predetermined chemical composition; and fine precipitates containing Cr and Ti at a steel sheet surface, wherein an average equivalent circular diameter of the fine precipitates is 20 nm or more and 500 nm or less, and a number of the fine precipitates existing per 1 μm2 at the steel sheet surface is three or more.

公开(公告)号：US20180358565A1

公开(公告)日：2018-12-13

申请号：US15735689

申请日：2016-08-19

Applicant: JFE STEEL CORPORATION

Inventor： Takashi KAWANO ,  Shin ISHIKAWA ,  Takuya MURAKAMI

IPC: H01L51/00 ,  H01L51/44

CPC classification number: H01L51/0096 ,  C25D5/36 ,  H01L51/0097 ,  H01L51/4253 ,  H01L51/44 ,  Y02E10/549

Abstract: Disclosed is a substrate for a photoelectric conversion element that is low in cost as compared with a conventional ITO/glass substrate, easy to handle, and does not lower the power generation performance of the solar cell. The substrate for a photoelectric conversion element is made of a stainless steel sheet having a passive film on a surface thereof, an atomic ratio Cr/(Fe+Cr) of the passive film on a surface thereof is 0.08 or more.