公开(公告)号：EP3205418A4

公开(公告)日：2018-05-30

申请号：EP14903581

申请日：2014-10-10

Applicant: JFE STEEL CORP

Inventor： KUYAMA SHUJI ,  ASANO KAZUYA ,  IIJIMA YOSHITSUGU ,  OGASAHARA TOMOYOSHI

IPC: B21B37/00 ,  B21B37/74 ,  B21C51/00 ,  B22D11/22 ,  B22D46/00 ,  C21D11/00 ,  G01N33/20

CPC classification number: B21C51/00 ,  B21B37/00 ,  B21B37/16 ,  B21B37/74 ,  B22D11/22 ,  B22D46/00 ,  C21D11/00 ,  C21D11/005 ,  G01N3/08 ,  G01N25/00 ,  G01N33/20

Abstract: An actual result DB 6 stores therein actual result data associating values of manufacturing condition items with a material-property-value, the values including a chemical composition per component of a steel-strip product manufactured in the past and a measured value by each measuring device in each of processes 12 to 14 of reheating, rolling, and cooling collected in a manufacturing process of the steel-strip product manufactured in the past, for each corresponding one of meshes dividing the steel-strip product. An actual value collecting device 5 collects a measured value for each of meshes dividing a target steel-strip product, by obtaining a measured value by each measuring device in a manufacturing process of the target steel-strip product while tracking a measurement position of the measured value. A property estimating unit 23 of an apparatus main body 2 estimates, for each of the meshes, a material-property-value corresponding to values of manufacturing condition items, by use of the actual result data, the values of manufacturing condition items being a chemical composition per component of the target steel-strip product and the collected measured value for each of the meshes.

公开(公告)号：EP2939751A4

公开(公告)日：2016-01-27

申请号：EP13867229

申请日：2013-11-27

Applicant: JFE STEEL CORP

Inventor： UEOKA SATOSHI ,  CHIBA TAKESHI ,  IBUKI KAZUYA ,  IIJIMA YOSHITSUGU

IPC: B21B45/02

CPC classification number: B21B45/0218 ,  B21B45/0233

公开(公告)号：EP2796216A4

公开(公告)日：2015-06-03

申请号：EP12859517

申请日：2012-12-20

Applicant: JFE STEEL CORP

Inventor： OGURA TAKAHIKO ,  SHIGETA HIROSHI ,  FUKUI YOSHIMITSU ,  IIJIMA YOSHITSUGU ,  MIKAMI KEI ,  MATSUKI YASUHIRO

IPC: B21B1/38 ,  B21B37/24

CPC classification number: B21H7/00 ,  B21B1/22 ,  B21B37/24 ,  B21B2001/225 ,  B21B2205/02 ,  B21C37/0803 ,  B21C37/083 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  Y10T428/12389

Abstract: Provided is a metal strip for a pipe with which the weight of a pipe can be reduced while maintaining the strength of a joint portion that tends to be structurally the weakest. A metal strip L is formed by rolling. The thickness of each of a head end portion 1a and a tail end portion 1b, which are longitudinal end portions 1, is greater than the thickness of an intermediate portion excluding the longitudinal end portions 1. The metal strips are connected to each other in series by welding, and a pipe is made by performing a pipe-forming operation.

公开(公告)号：EP1652942A4

公开(公告)日：2007-02-21

申请号：EP03817791

申请日：2003-08-05

Applicant: JFE STEEL CORP

Inventor： IIJIMA YOSHITSUGU ,  MIZUNO HIROSHI ,  SEKINE HIROSHIJFE ,  SUZUKI N ,  SUGIOKA M

IPC: C21D1/42 ,  B21B1/22 ,  B21B15/00 ,  B21B37/74 ,  B21B45/00 ,  B21B45/02 ,  C21D8/02 ,  C21D11/00

CPC classification number: C21D1/42 ,  B21B37/74 ,  B21B45/004 ,  B21B45/0218 ,  B21B2001/225 ,  B21B2015/0071 ,  B21B2275/06 ,  C21D1/18 ,  C21D8/0263 ,  C21D11/00 ,  H05B6/104 ,  Y02P10/253

Abstract: A process for producing a steel product, comprising the step of, after hot rolling, passing a steel product having been quenched or having undergone accelerated cooling on hot rolling line through multiple induction heaters disposed on the hot rolling line three or more times to thereby effect heat treatment thereof. This process enables uniform heat treatment of steel products with high productivity.

公开(公告)号：EP1496129A4

公开(公告)日：2006-02-22

申请号：EP03745906

申请日：2003-04-03

Applicant: JFE STEEL CORP

Inventor： IIJIMA YOSHITSUGU ,  MIZUNO HIROSHI ,  SEKINE HIROSHI ,  SUZUKI NORITSUGU ,  NAKANO KIYOSHI ,  SUGIOKA MASATOSHI

IPC: B23K35/32 ,  C21D1/42 ,  C21D9/60 ,  C21D11/00 ,  H05B6/02 ,  H05B6/06 ,  H05B6/10 ,  G05D23/00

CPC classification number: C21D11/00 ,  B23K35/32 ,  C21D1/42 ,  C21D9/60 ,  Y02P10/253

Abstract: A heat treating device comprising a plurality sets of induction heating device (6) for heating a steel product (1), a correcting device (5) for correcting a steel product, a computing device (14) for computing power to be supplied to the induction heating device based on the conveying speed of a steel product, its target heating temperature, and its estimated temperature in a pre-stage in the induction heating device, and a power supply device (12) for supplying to the induction heating device a schedule power computed by the computing device, wherein the computing device computes power for uniformly heat-treating a steel product or power for surface-heat-treating a steel product.