公开(公告)号：US20170336336A1

公开(公告)日：2017-11-23

申请号：US15528330

申请日：2015-03-23

Applicant: JFE STEEL CORPORATION

Inventor： Yuji TANAKA ,  Takako YAMASHITA ,  Masayasu NAGOSHI

IPC: G01N23/225 ,  H01J37/256 ,  H01J37/18 ,  H01J37/28 ,  G01N23/207

CPC classification number: G01N23/2252 ,  G01N23/207 ,  H01J37/18 ,  H01J37/256 ,  H01J37/28 ,  H01J2237/022 ,  H01J2237/2067 ,  H01J2237/2807 ,  H01J2237/2813

Abstract: The present invention makes it possible to analyze trace carbon in a sample without the effects of contamination. In an electron probe microanalyzer, a liquid nitrogen trap and a plasma or oxygen radical generator are jointly used as a means for suppressing contamination, and two or more carbon detection units for detecting characteristic x-rays of carbon in the sample are provided.

公开(公告)号：US20190292623A1

公开(公告)日：2019-09-26

申请号：US16432274

申请日：2019-06-05

Applicant: JFE STEEL CORPORATION

Inventor： Masayasu NAGOSHI ,  Tomohiro MATSUSHIMA ,  Makoto WATANABE ,  Shigehiro TAKAJO ,  Toshito TAKAMIYA ,  Masanori UESAKA ,  Takashi TERASHIMA

IPC: C21D9/46 ,  C22C38/02 ,  C21D8/12 ,  H01F27/245 ,  H02K1/02 ,  H02K1/06 ,  H01F1/18 ,  H01F1/16 ,  G01N21/62 ,  G01N23/225 ,  G01N23/2251

Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.

公开(公告)号：US20170240987A1

公开(公告)日：2017-08-24

申请号：US15514746

申请日：2015-09-11

Applicant: JFE STEEL CORPORATION

Inventor： Masayasu NAGOSHI ,  Tomohiro MATSUSHIMA ,  Makoto WATANABE ,  Shigehiro TAKAJO ,  Toshito TAKAMIYA ,  Masanori UESAKA ,  Takashi TERASHIMA

IPC: C21D9/46 ,  C21D8/12 ,  H01F27/245 ,  G01N21/62 ,  H02K1/02 ,  H02K1/06 ,  G01N23/225 ,  C22C38/02 ,  H01F1/18

Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.

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。