公开(公告)号：US11530471B2

公开(公告)日：2022-12-20

申请号：US17040539

申请日：2019-03-28

申请人： JFE STEEL CORPORATION

发明人： Keisuke Ando ,  Tatsumi Kimura ,  Satoshi Igi

IPC分类号： C22C38/34 ,  C21D8/02 ,  C22C38/60

摘要： The rail having a chemical composition containing C: 0.70-0.85 mass %, Si: 0.50-1.60 mass %, Mn: 0.20-1.00 mass %, P: 0.035 mass % or less, S: 0.012 mass % or less, Cr: 0.40-1.30 mass %, the chemical composition satisfying the formula (1) 0.30≤[% Si]/10+[% Mn]/6+[% Cr]/3≤0.55  (1) where [% M] is the content in mass % of the element M, the balance being Fe and inevitable impurities, where Vickers hardness of a region between positions where a depth from a surface of a rail head of 0.5 and 25 mm is ≥370 HV and 5% and

公开(公告)号：US11492689B2

公开(公告)日：2022-11-08

申请号：US17040979

申请日：2019-03-28

申请人： JFE STEEL CORPORATION

发明人： Keisuke Ando ,  Tatsumi Kimura ,  Satoshi Igi

IPC分类号： C22C38/34 ,  C21D6/00 ,  C21D8/00 ,  C21D9/04 ,  C22C38/02 ,  C22C38/04

摘要： The rail having a chemical composition containing C: 0.70-1.00 mass %, Si: 0.50-1.60 mass %, Mn: 0.20-1.00 mass %, P: ≤0.035 mass %, S: ≤0.012 mass %, Cr: 0.40-1.30 mass %, where Ceq defined by the formula (1) is 1.04-1.25, Ceq=[% C]+([% Si]/11)+([% Mn]/7)+([% Cr]/5.8)  (1) where [% M] is the content in mass % of the element M, the balance being Fe and inevitable impurities, where Ceq(max) is ≤1.40, where the Ceq(max) is determined by the formula (2) using maximum contents of C, Si, Mn, and Cr obtained by subjecting a region between specified positions to EPMA line analysis; and a pearlite area ratio in the region is 95% or more, Ceq(max)=[% C(max)]+([% Si(max)]/11)+([% Mn(max)]/7)+([% Cr(max)]/5.8)  (2) where [% M(max)] is the maximum content of the element M.

公开(公告)号：US20160083820A1

公开(公告)日：2016-03-24

申请号：US14779755

申请日：2014-03-25

申请人： JFE STEEL CORPORATION

发明人： Tatsumi Kimura ,  Kiyoshi Uwai ,  Shigeru Endo ,  Moriyasu Yamaguchi

IPC分类号： C22C38/28 ,  C21D9/04 ,  C21D6/00 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/00

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 pearlitic rail includes a composition 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; 0.0005% to 0.030% of S; 0.1% to 2.0% of Cr, remainder of the composition consisting of Fe and inevitable impurities. Surface hardness of a rail top is not less than HB 430, and hardness at a depth of 25 mm from a surface of the rail top is not less than HB 410.

摘要翻译： 珠光体钢轨包括以质量％计的组成：C的0.70〜0.90％ 0.1％〜1.5％的Si; 0.01％〜1.5％的Mn; 0.001％〜0.035％的P; 0.0005％〜0.030％的S; 0.1％至2.0％的Cr，组成的剩余部分由Fe和不可避免的杂质组成。 轨顶的表面硬度不小于HB 430，并且距离轨道顶部的表面的深度为25mm的硬度不小于HB 410。

公开(公告)号：US10100380B2

公开(公告)日：2018-10-16

申请号：US15970377

申请日：2018-05-03

申请人： JFE STEEL CORPORATION

发明人： Ryo Matsuoka ,  Makoto Nakaseko ,  Rinya Kojo ,  Tomoo Horita ,  Hideki Takahashi ,  Yoshikazu Yoshida ,  Tatsumi Kimura ,  Mineyasu Takemasa ,  Yuzuru Kataoka

IPC分类号： C21D9/04 ,  C21D1/667 ,  C21D1/18

摘要： A rail cooling device configured to forcibly cool a rail by jetting a coolant includes a porous plate nozzle including a plurality of nozzle holes configured to jet the coolant to an underside of the base of the rail to cool the underside of the base of the rail. Ends in a width direction of the porous plate nozzle correspond to ends of the underside of the base of the rail. Nozzle holes of the porous plate nozzle at the ends of the width direction are smaller than nozzle holes of the porous plate nozzle at a central part in the width direction, and a maximum value of a distance between centers of the nozzle holes at both ends in the width direction is 30% or more of a width of the underside of the base.

公开(公告)号：US09988696B2

公开(公告)日：2018-06-05

申请号：US14376236

申请日：2013-02-01

申请人： JFE STEEL CORPORATION

发明人： Ryo Matsuoka ,  Makoto Nakaseko ,  Rinya Kojo ,  Tomoo Horita ,  Hideki Takahashi ,  Yoshikazu Yoshida ,  Tatsumi Kimura ,  Mineyasu Takemasa ,  Yuzuru Kataoka

IPC分类号： C21D1/667 ,  C21D9/04 ,  C21D1/18

CPC分类号： C21D1/667 ,  C21D1/18 ,  C21D9/04 ,  C21D2211/001 ,  C21D2211/009 ,  C21D2221/00 ,  C21D2221/02

摘要： A rail cooling method for forcibly cooling a rail by jetting a coolant includes jetting the coolant to a foot back part of the rail from a porous plate nozzle in which a nozzle hole at an end in a width direction is smaller than a nozzle hole at a central part in the width direction and causes a cooling capacity for the end in the width direction of the underside of the base of the rail to be lower than a cooling capacity for the central part in the width direction of the underside of the base of the rail.

公开(公告)号：US11111555B2

公开(公告)日：2021-09-07

申请号：US16488343

申请日：2018-03-20

申请人： JFE STEEL CORPORATION

发明人： Minoru Honjo ,  Tatsumi Kimura ,  Katsuyuki Ichimiya ,  Kazukuni Hase

IPC分类号： C21D9/04 ,  C21D6/00 ,  C21D8/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42

摘要： A rail achieves a high 0.2% proof stress after straightening treatment, the high 0.2% proof stress being effective at improving rolling contact fatigue resistance of the rail, by hot rolling a steel raw material to obtain a rail, the steel raw material having a chemical composition containing C: 0.70% to 0.85%, Si: 0.1% to 1.5%, Mn: 0.4% to 1.5%, P: 0.035% or less, S: 0.010% or less, and Cr: 0.05% to 1.50% with the balance being Fe and inevitable impurities; straightening the rail with a load of 50 tf or more; and subsequently subjecting the rail to heat treatment in which the rail is held in a temperature range of 150° C. or more and 400° C. or less for 0.5 hours or more and 10 hours or less.

公开(公告)号：US10253397B2

公开(公告)日：2019-04-09

申请号：US14779755

申请日：2014-03-25

申请人： JFE STEEL CORPORATION

发明人： Tatsumi Kimura ,  Kiyoshi Uwai ,  Shigeru Endo ,  Moriyasu Yamaguchi

IPC分类号： C21D9/04 ,  C22C38/28 ,  C21D8/00 ,  C22C38/00 ,  C22C38/18 ,  C22C38/50 ,  C21D6/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26

摘要： A pearlitic rail includes a composition 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; 0.0005% to 0.030% of S; 0.1% to 2.0% of Cr, remainder of the composition consisting of Fe and inevitable impurities. Surface hardness of a rail top is not less than HB 430, and hardness at a depth of 25 mm from a surface of the rail top is not less than HB 410.

公开(公告)号：US20170101692A1

公开(公告)日：2017-04-13

申请号：US15128267

申请日：2015-03-24

申请人： JFE STEEL CORPORATION

发明人： Tatsumi Kimura ,  Yukio Takashima

IPC分类号： C21D9/04 ,  C21D6/00 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/02 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00 ,  C21D8/00 ,  C22C38/22

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.

公开(公告)号：US20150027599A1

公开(公告)日：2015-01-29

申请号：US14376236

申请日：2013-02-01

申请人： JFE STEEL CORPORATION

发明人： Ryo Matsuoka ,  Makoto Nakaseko ,  Rinya Kojo ,  Tomoo Horita ,  Hideki Takahashi ,  Yoshikazu Yoshida ,  Tatsumi Kimura ,  Mineyasu Takemasa ,  Yuzuru Kataoka

IPC分类号： C21D1/667 ,  C21D9/04 ,  C21D1/18

CPC分类号： C21D1/667 ,  C21D1/18 ,  C21D9/04 ,  C21D2211/001 ,  C21D2211/009 ,  C21D2221/00 ,  C21D2221/02

摘要： A rail cooling method for forcibly cooling a rail by jetting a coolant includes jetting the coolant to a foot back part of the rail from a porous plate nozzle in which a nozzle hole at an end in a width direction is smaller than a nozzle hole at a central part in the width direction and causes a cooling capacity for the end in the width direction of the underside of the base of the rail to be lower than a cooling capacity for the central part in the width direction of the underside of the base of the rail.

摘要翻译： 通过喷射冷却剂来强制冷却轨道的轨道冷却方法包括从多孔板喷嘴将冷却剂喷射到轨道的脚后部，在多孔板喷嘴中，宽度方向端部的喷嘴孔小于喷嘴孔 在宽度方向上的中心部分，并且使得轨道底部的宽度方向上的端部的冷却能力低于基部的底部宽度方向上的中心部分的冷却能力 轨。