公开(公告)号：EP2196552A4

公开(公告)日：2015-12-23

申请号：EP08739390

申请日：2008-03-25

申请人： JFE STEEL CORP

发明人： HONJO MINORU ,  KIMURA TATSUMI ,  SUZUKI SHINICHI ,  NISHIMURA KIMIHIRO ,  SHIKANAI NOBUO

IPC分类号： C22C38/00 ,  B21B1/085 ,  B21B3/00 ,  C21D1/02 ,  C21D6/00 ,  C21D8/00 ,  C21D9/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/24 ,  C22C38/48

CPC分类号： C22C38/02 ,  B21B1/085 ,  C21D1/02 ,  C21D6/00 ,  C21D6/002 ,  C21D6/005 ,  C21D8/005 ,  C21D9/04 ,  C21D2211/009 ,  C21D2221/00 ,  C21D2221/02 ,  C22C38/001 ,  C22C38/04 ,  C22C38/24

公开(公告)号：EP3124636A4

公开(公告)日：2017-02-01

申请号：EP15768893

申请日：2015-03-24

申请人： JFE STEEL CORP

发明人： KIMURA TATSUMI ,  TAKASHIMA YUKIO

IPC分类号： C22C38/00 ,  C21D8/00 ,  C21D9/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

CPC分类号： C21D9/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

摘要： Provided is a rail that exhibits excellent wear resistance and reduced hardness variation in a rail length direction. The rail has a chemical composition containing 0.60% to 1.0% of C, 0.1% to 1.5% of Si, 0.01% to 1.5% of Mn, 0.035% or less of P, 0.030% or less of S, and 0.1% to 2.0% of Cr, the balance being Fe and incidental impurities. Surface hardness of the rail exhibits variation of ±HB 15 points or less in the rail length direction.

摘要翻译： 本发明提供一种在轨道长度方向上显示出优异的耐磨性和降低的硬度变化的轨道。 所述钢轨具有含C：0.60％〜1.0％，Si：0.1％〜1.5％，Mn：0.01％〜1.5％，P：0.035％以下，S：0.030％以下，以及0.1％〜2.0％ ％的Cr，余量为Fe和不可避免的杂质。 导轨的表面硬度在导轨长度方向上呈±HB 15点或更低的变化。

公开(公告)号：EP2980231A4

公开(公告)日：2016-12-21

申请号：EP14774063

申请日：2014-03-25

申请人： JFE STEEL CORP

发明人： KIMURA TATSUMI ,  UWAI KIYOSHI ,  ENDO SHIGERU ,  YAMAGUCHI MORIYASU

IPC分类号： C21D9/04 ,  C21D8/00 ,  C22C38/00 ,  C22C38/18 ,  C22C38/50

CPC分类号： C22C38/28 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/00 ,  C21D8/005 ,  C21D9/04 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/50

摘要： A method of manufacturing a pearlitic rail according to the present invention includes: hot rolling a billet including in % by mass: 0.70% to 0.90% of C; 0.1% to 1.5% of Si; 0.01% to 1.5% of Mn; 0.001% to 0.035% of P; 0.005% to 0.030% of S; 0.1% to 2.0% of Cr, remainder of the composition consisting of Fe and inevitable impurities, so as to achieve a finishing rolling temperature of not lower than 900°C to form a rail material; and cooling the rail material in an accelerated manner at a cooling rate of 2°C /s to 30°C /s from a temperature of 770°C to 500°C, reheating the resultant or subjecting the resultant to secondary heating to a temperature within the range of 530°C to 580°C, holding the resultant at the temperature range for 20 s to 100 s, and cooling the resultant in an accelerated manner at a cooling rate of 2°C /s to 10°C /s to a temperature within the range of not higher than 450°C.

公开(公告)号：EP2006406A4

公开(公告)日：2015-08-12

申请号：EP07739569

申请日：2007-03-16

申请人： JFE STEEL CORP

发明人： HONJO MINORU ,  KIMURA TATSUMI ,  SUZUKI SHINICHI ,  SHIKANAI NOBUO

IPC分类号： C22C38/00 ,  C21D8/00 ,  C21D9/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/58

CPC分类号： C21D8/00 ,  C21D9/04 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18

摘要： The invention provides a high-strength pearlitic steel rail, which is inexpensive, and has a tensile strength of 1200 MPa or more, and is excellent in delayed fracture properties. Specifically, the rail contains, in mass percent, C of 0.6 to 1.0%, Si of 0.1 to 1.5%, Mn of 0.4 to 2.0%, P of 0.035% or less, S of 0.0005 to 0.010%, and the remainder is Fe and inevitable impurities, wherein tensile strength is 1200 MPa or more, and size of a long side of an A type inclusion is 250 µm or less in at least a cross-section in a longitudinal direction of a rail head, and the number of A type inclusions, each having a size of a long side of 1 µm to 250 µm, is less than 25 per observed area of 1 mm 2 in the cross-section in the longitudinal direction of the rail head.

公开(公告)号：EP2612939A4

公开(公告)日：2014-08-13

申请号：EP11821237

申请日：2011-05-24

申请人： JFE STEEL CORP ,  NTN TOYO BEARING CO LTD

发明人： HONJO MINORU ,  HASE KAZUKUNI ,  KIMURA TATSUMI ,  MITAO SHINJI

IPC分类号： C22C38/00 ,  C21D6/00 ,  C21D9/00 ,  C22C38/22 ,  C22C38/54

CPC分类号： C21D9/0068 ,  C21D1/28 ,  C21D7/13 ,  C21D9/00 ,  C21D9/40 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/44

公开(公告)号：EP2135966A4

公开(公告)日：2012-01-04

申请号：EP08739394

申请日：2008-03-25

申请人： JFE STEEL CORP

发明人： HONJO MINORU ,  KIMURA TATSUMI ,  SUZUKI SHINICHI ,  NISHIMURA KIMIHIRO ,  MITAO SHINJI ,  SHIKANAI NOBUO

IPC分类号： B21B1/085 ,  C21D1/18 ,  C21D8/00 ,  C21D9/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/40

CPC分类号： C22C38/02 ,  B21B1/085 ,  C21D1/18 ,  C21D8/00 ,  C21D9/04 ,  C21D2211/009 ,  C22C38/04 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/40

公开(公告)号：EP1209244A4

公开(公告)日：2005-04-06

申请号：EP01921983

申请日：2001-04-23

申请人： JFE STEEL CORP

发明人： KIMURA TATSUMI ,  MORIKAGE YASUSHI ,  AMONO KENITI ,  OKUI TAKANORI ,  TAOKA KEIZOU ,  MIURA HIRONORI ,  OOKUBO HIROYUKI ,  KAWABATA FUMIMARU

IPC分类号： B21B1/08 ,  C21D8/00 ,  C21D8/02 ,  C21D9/44 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  E21D9/04 ,  C22C38/58

CPC分类号： B21B1/082 ,  C21D8/00 ,  C21D8/0226 ,  C21D9/44 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  Y10T403/32

摘要： A production method for a linear shape steel having joints (2) each consisting of a ball hook (21) and a curved hook (20) at the end of a web, the method comprising the steps of hot-rolling a steel material vertically symmetrically to form a shaped bloom having flanges (2A) at the ends of a web (1) (first step), hot-rolling the bloom vertically non-symmetrically to adjust the web in size and form the flanges into shape joints (2B) including projecting ridges (20A) (second step), and hot-bend-forming-rolling the projecting ridges to form curved hooks (20) (third step), wherein the steel material contains 0.01-0.20 mass% of C, up to 0.8 mass% of Si, up to 1.8 mass% of Mn, up to 0.030 mass% of P and up to 0.02 mass% of S, and a hook bending start temperature in the third step is set to be over Ar3 or up to Ar3-50 DEG C so that the depth of a wrinkle (10) present on the inner side of the hook is made up to 0.5mm.