公开(公告)号：CA2846584A1

公开(公告)日：2013-04-25

申请号：CA2846584

申请日：2012-10-16

Applicant: JFE STEEL CORP

Inventor： YOSHIKAWA MASAKI ,  NAGAHAMA TAKUYA ,  CHIKATSUNE HIROSHI ,  TAKANO JUN ,  KAWAI TAKAMASA ,  UETA MASATERU ,  TAKAHASHI KAZUNARI ,  MORIOKA NOBUHIKO

IPC: F16L15/04

Abstract: Provided is a threaded coupling for a steel pipe having excellent galling resistance and seal performance as a radial-seal type connector. With this threaded coupling a plating having a Vickers hardness of not less than 310 is applied to the screw portion of the box and the inner surface of the box corresponding to the seal portion, and the seal interference amount ratio of the seal part in the pipe circumferential direction is not less than 0.002 as calculated with d/D, where D is the seal diameter, defined by the pin outer diameter at the seal point, which is the region on the outer circumferential surface of the nose part on the pin-side that first makes contact with the inner circumferential surface of the nose part on the box-side when the threaded engagement is established, and d is the amount of interference as defined by the amount by which the diameter of the seal point is reduced when the diameter of the seal point is reduced by the box, when the threaded engagement is established.

公开(公告)号：CA2667843A1

公开(公告)日：2008-08-07

申请号：CA2667843

申请日：2007-01-30

Applicant: JFE STEEL CORP

Inventor： MAETANI TOSHIO ,  UETA MASATERU ,  UENOSONO SATOSHI

IPC: B22F1/00 ,  B22F3/00 ,  B22F9/08 ,  C22C38/00 ,  C22C38/04 ,  H01F1/24

Abstract: A pure iron powder which contains as impurities, in terms of mass%, up to 0.005% C, 0.01-0.03%, excluding 0.01%, Si, 0.03-0.07% Mn, up to 0.01% P, up to 0.01% S, up to 0.10% O, and up to 0.001% N. The iron powder particles ea ch is composed of up to four crystal grains on the average and have a micro- Vickers hardness (Hv) of 80 or lower on the average. The iron powder is suit able for use in parts with excellent magnetic properties and in high-density sintered parts, has excellent productivity, and has high compressibility. T he iron powder preferably has a roundness of 0.7 or higher.

公开(公告)号：EP3098496A4

公开(公告)日：2017-03-08

申请号：EP14879716

申请日：2014-12-18

Applicant: JFE STEEL CORP

Inventor： YOSHIKAWA MASAKI ,  CHIKATSUNE HIROSHI ,  TAKAHASHI KAZUNARI ,  NAGAHAMA TAKUYA ,  TAKANO JUN ,  UETA MASATERU ,  KAWAI TAKAMASA

IPC: F16L15/04 ,  E21B17/042

CPC classification number: F16L15/001 ,  E21B17/042 ,  F16L15/06

公开(公告)号：EP3064818A4

公开(公告)日：2017-03-08

申请号：EP14877606

申请日：2014-10-30

Applicant: JFE STEEL CORP

Inventor： KAWAI TAKAMASA ,  TAKAHASHI KAZUNARI ,  CHIKATSUNE HIROSHI ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  NAGAHAMA TAKUYA ,  UETA MASATERU ,  YONEYAMA TSUYOSHI ,  SATO HIDEO ,  SEKI HARUHIKO

IPC: F16L15/04 ,  E21B17/042

CPC classification number: F16L15/04 ,  E21B17/042 ,  F16L15/004 ,  F16L15/06

公开(公告)号：EP2871396A4

公开(公告)日：2015-09-09

申请号：EP13813334

申请日：2013-07-01

Applicant: JFE STEEL CORP

Inventor： NAGAHAMA TAKUYA ,  TAKAHASHI KAZUNARI ,  CHIKATSUNE HIROSHI ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  KAWAI TAKAMASA ,  UETA MASATERU

IPC: F16L15/04 ,  E21B17/042

CPC classification number: F16L15/00 ,  E21B17/042 ,  E21B17/08 ,  F16L15/004 ,  F16L15/06 ,  F16L2201/40

公开(公告)号：EP2108472A4

公开(公告)日：2011-05-18

申请号：EP07708007

申请日：2007-01-30

Applicant: JFE STEEL CORP

Inventor： MAETANI TOSHIO ,  UENOSONO SATOSHI ,  UETA MASATERU

IPC: B22F1/00 ,  B22F3/00 ,  B22F9/08 ,  C22C38/00 ,  C22C38/04 ,  H01F1/24

CPC classification number: H01F41/0246 ,  B22F2998/00 ,  C22C33/0271 ,  C22C38/02 ,  C22C38/04 ,  H01F1/26 ,  Y10T428/2991 ,  B22F9/082