公开(公告)号：EP1978122A4

公开(公告)日：2015-03-18

申请号：EP07714047

申请日：2007-02-06

Applicant: JFE STEEL CORP

Inventor： FUJITA KOICHIRO ,  INOUE TADASHI

IPC: C22C38/00 ,  C21D6/00 ,  C21D8/02 ,  C21D8/04 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  G10K11/162 ,  H01F1/147

CPC classification number: C21D8/0273 ,  C21D6/008 ,  C21D8/0242 ,  C21D8/0442 ,  C21D8/12 ,  C21D8/1238 ,  C21D8/1272 ,  C21D9/46 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  G10K11/162 ,  H01F1/14775 ,  H01F1/16

公开(公告)号：EP2103703A4

公开(公告)日：2010-06-16

申请号：EP06843369

申请日：2006-12-20

Applicant: JFE STEEL CORP

Inventor： MINEJI NOBUKO ,  SUGIHARA REIKO ,  INOUE TADASHI

IPC: C22C38/00 ,  C21D9/46

CPC classification number: C21D9/46 ,  C22C38/004 ,  C22C38/04 ,  Y10T29/49108

公开(公告)号：EP1143022A4

公开(公告)日：2006-05-17

申请号：EP00960974

申请日：2000-09-13

Applicant: JFE STEEL CORP

Inventor： INOUE TADASHI ,  MOTOYASHIKI YOICHI ,  KIKUCHI HIROYASU ,  INAZUMI TORU ,  IMADA SADANORI ,  ODAKE TAKAYUKI ,  NAGATAKI YASUNOBU

IPC: C21D8/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C23C2/02 ,  C21D9/46

CPC classification number: C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/008 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C23C2/02

Abstract: A steel thin plate which contains, in wt %, 0.04 to 0.1 % of C, 0.5 % or less of Si, 0.5 to 2 % of Mn, 0.05 % or less of P, 0.005 % or less of O and 0.005 % or less of S, and has an average ferrite grain diameter of 10 mu m or less and a frequency of formation A, which is defined as the total length of a second phase structure in the form of a band observed per 1 mm of the cross section of a plate along the direction of rolling, of 20 mm/mm or less. The steel thin plate can be produced, for example, by a method comprising a step of subjecting a continuously cast slab containing the above-mentioned components, directly or after re-heating, to a hot rolling at its Ar3 transformation temperature or higher, and a step of cooling the hot rolled steel plate to a temperature of 600 to 750C within 2 seconds at a cooling rate of 100 - 2000 DEG C / s and winding it up at a temperature of 450 to 650C. The steel thin plate has a high strength of 340 Mpa or higher, and also is excellent in ductility, stretch-flanging property and impact resistance even after hot dip zinc plating and can be wound into a coil having good surface properties.

公开(公告)号：EP1170390A4

公开(公告)日：2005-02-23

申请号：EP00962865

申请日：2000-09-27

Applicant: JFE STEEL CORP

Inventor： NAKATA HIROSHI ,  INOUE TADASHI ,  INAZUMI TORU ,  KIKUCHI HIROYASU ,  IMADA SADANORI ,  HIURA AKIRA ,  NAKAHARA TAKESHI ,  ISHIJIMA SATOSHI ,  FUNAKAWA YOSHIMASA

IPC: C21D8/02 ,  C21D8/12 ,  C22C38/00 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  H01F1/16 ,  C21D8/04 ,  C21D9/46

CPC classification number: H01F1/16 ,  C21D8/0226 ,  C21D8/1222 ,  C21D8/1261 ,  C22C38/008 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  Y02P10/212

Abstract: A hot-rolled steel sheet having a high tensile strength which comprises a steel containing, in mass %, 0.04 to 0.09 % of C, 0.1 % or less of Si, 0.5 to 1.5 % of Mn, 0.02 % or less of P, 0.01 % or less of S, 0.1 % or less of Al, 0.001 to 0.008 % of N, and 0.01 to 0.15 % of Ti, contents of respective components satisfying the following formula (1): [C] + 7 x [Si] + 0.1 x [Mn] + [P] + 14 x [S] + 1.75 x [Al] + 23 x [N] + [Ti] + 18 x [O] + 7 x [Cu] + 18 x [Sn] + 7 x [Mo] + 1.7 x [Cr] + 70 x [B] + 7 x [Ca] + 14 x [Zr] + 14 x [V] + 7 x [Nb]

公开(公告)号：EP1149925A4

公开(公告)日：2005-01-12

申请号：EP00962864

申请日：2000-09-27

Applicant: JFE STEEL CORP

Inventor： INOUE TADASHI ,  MOTOYASHIKI YOICHI ,  KIKUCHI HIROYASU ,  INAZUMI TORU ,  FUNAKAWA YOSHIMASA ,  NAKATA HIROSHI ,  IMADA SADANORI

IPC: C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22

CPC classification number: C21D8/0226 ,  C21D8/021

Abstract: A method for producing sheet steel which comprises the steps of producing a crude bar by rough rolling, subjecting the crude bar to finish rolling at a temperature of (Ar3 transformation temperature -20 DEG C or higher), to produce a steel belt, subjecting the steel belt to primary cooling, allowing it to stand for cooling, subjecting it to secondary cooling, and winding up the resultant steel belt, wherein the primary cooling is carried out with a cooling rate greater than 120 DEG C/sec down to a temperature of 500 to 800 DEG C.

公开(公告)号：EP1995340A4

公开(公告)日：2013-12-25

申请号：EP07739025

申请日：2007-03-13

Applicant: JFE STEEL CORP

Inventor： MINEJI NOBUKO ,  YASUHARA EIKO ,  SUGIHARA REIKO ,  INOUE TADASHI

IPC: C22C38/00 ,  B21B1/22 ,  B21B3/00 ,  C21D8/04 ,  C21D9/48 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

CPC classification number: B21B1/22 ,  B21B3/00 ,  C21D8/02 ,  C21D8/04 ,  C21D9/48 ,  C21D2211/005 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  Y10T29/49108

Abstract: Provided are a cold-rolled steel sheet having a composition containing, by mass percent, 0.0040% or less of C, 0.02% or less of Si, 0.14% to 0.25% of Mn, 0.020% or less of P, 0.015% or less of S, 0.0040% or less of N, 0.020% to 0.070% of Al, 0.005% to 0.030% of Nb, 0.005% to 0.030% of Ti, (0.0003% to 0.0010% of the equivalent amount of solid solution B (from which the amount of B forming BN has been subtracted)), and the balance composed of Fe and inevitable impurities, wherein even when the rolling reduction of cold rolling is 85% or less, the average grain size of a ferrite structure is reliably 12.0 µm or less, and the relationship -0.20 ‰¤ ”r ‰¤ 0.20 can be reliably satisfied and which has an excellent earing property, and a method of producing the same.

Abstract translation: 本发明提供具有包含组合物，以质量％计的冷轧钢板，0.0040％或更少的C，0.02％至或更少的Si，0.14％至与Mn的0.25％，0.020％或更少的P，0.015％或更少的 S，0.0040％以下的N，铝的0.020％到0.070％以下，Nb：0.005％〜0.030％，0.005％与Ti的0.030％的（0.0003％至固溶B的当量为0.0010％（由 乙形成BN的其量已减去）），以及Fe和不可避免的杂质，worin甚至当冷轧的压下率是85％或更小的组成的余量中，铁素体组织的平均晶粒尺寸是可靠12.0微米 或更小，并且关系-0.20‰¤“R‰¤0:20能够满足可靠且具有优异的凸耳性，及其制备的方法。

公开(公告)号：EP1143019A4

公开(公告)日：2008-04-30

申请号：EP00962863

申请日：2000-09-27

Applicant: JFE STEEL CORP

Inventor： INOUE TADASHI ,  MOTOYASHIKI YOICHI ,  KIKUCHI HIROYASU ,  INAZUMI TORU ,  NAKATA HIROSHI ,  ODAKE TAKAYUKI ,  ISHIGURO YASUHIDE ,  IMADA SADANORI

IPC: C21D1/19 ,  C21D8/02 ,  C21D9/46

CPC classification number: C21D9/48 ,  C21D1/19 ,  C21D8/0226 ,  C21D8/0426 ,  C21D8/0463 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04

Abstract: The method for manufacturing steel sheet comprises the steps of: rough-rolling to form a sheet bar; finish-rolling the sheet bar to form a steel strip; applying primary cooling and secondary cooling to the finish-rolled steel strip; and coiling the secondary-cooled steel strip. The primary cooling is conducted at cooling speeds of 120 DEG C/sec or more down to the temperatures of from 500 to 800 DEG C. The secondary cooling is conducted at cooling speeds of less than 60 DEG C/sec.

公开(公告)号：EP1136575A4

公开(公告)日：2008-04-23

申请号：EP00951902

申请日：2000-08-09

Applicant: JFE STEEL CORP

Inventor： INOUE TADASHI ,  ISHIGURO YASUHIDE ,  MOTOYASHIKI YOICHI ,  INAZUMI TORU ,  IMADA SADANORI

IPC: C21D9/46 ,  C21D1/84 ,  C21D8/02 ,  C21D8/04 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

CPC classification number: C21D8/0426 ,  C21D1/84 ,  C21D8/0226 ,  C21D8/041 ,  C21D8/0463 ,  C22C38/004 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

Abstract: A method of producing a cold rolled steel sheet, which comprises the steps of rough-rolling slabs by a roughing mill, finish-rolling rough-rolled bars by a continuous hot finish-rolling mill, cooling the hot rolled steel strip in coil with runout, winding the cooled hot rolled steel strip in coil, and pickling, cold rolling and final-annealing the hot rolled steel strip in coil.

Abstract translation: 1.一种冷轧钢板的制造方法，其特征在于，包括：利用粗轧机对板坯进行粗轧，用连续热精轧机对粗轧棒材进行精轧后，将卷成圈的热轧钢带冷却 将冷却后的热轧钢带缠绕成卷材，然后进行酸洗，冷轧并将热轧钢带卷成最终退火。

公开(公告)号：EP2116311A4

公开(公告)日：2013-06-26

申请号：EP07859917

申请日：2007-12-14

Applicant: JFE STEEL CORP

Inventor： HASEGAWA KOHEI ,  INOUE TADASHI ,  KAWAI TAKAMASA ,  KIMURA YUKIO

IPC: B21B1/22 ,  B21B27/00 ,  B21B27/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/38

CPC classification number: C22C38/06 ,  B21B1/227 ,  B21B27/005 ,  B21B2001/228 ,  B21B2265/14 ,  B21B2267/10 ,  C21D7/04 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  Y10T428/12389

公开(公告)号：DE60045303D1

公开(公告)日：2011-01-13

申请号：DE60045303

申请日：2000-09-27

Applicant: JFE STEEL CORP

Inventor： INOUE TADASHI ,  MOTOYASHIKI YOICHI ,  KIKUCHI HIROYASU ,  INAZUMI TORU ,  FUNAKAWA YOSHIMASA ,  NAKATA HIROSHI ,  IMADA SADANORI

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22