公开(公告)号：US20080011393A1

公开(公告)日：2008-01-17

申请号：US11780166

申请日：2007-07-19

申请人： Masaharu Ueda ,  Koichiro Matsushita ,  Kazuo Fujita ,  Katsuya Iwano ,  Koichi Uchino ,  Takashi Morohoshi ,  Akira Kobayashi

发明人： Masaharu Ueda ,  Koichiro Matsushita ,  Kazuo Fujita ,  Katsuya Iwano ,  Koichi Uchino ,  Takashi Morohoshi ,  Akira Kobayashi

IPC分类号： C21D9/04

CPC分类号： C22C38/02 ,  C21D8/00 ,  C21D8/005 ,  C21D9/04 ,  C21D2211/009 ,  C22C38/002 ,  C22C38/04 ,  C22C38/18

摘要： The present invention is: a pearlitic steel rail excellent in wear resistance and ductility, characterized in that, in a steel rail having pearlite structure containing, in mass, 0.65 to 1.40% C, the number of the pearlite blocks having grain sizes in the range from 1 to 15 μm is 200 or more per 0.2 mm2 of an observation field at least in a part of the region down to a depth of 10 mm from the surface of the corners and top of the head portion; and a method for producing a pearlitic steel rail excellent in wear resistance and ductility, characterized by, in the hot rolling of said steel rail, applying finish rolling so that the temperature of the rail surface may be in the range from 850° C. to 1,000° C. and the sectional area reduction ratio at the final pass may be 6% or more, and then applying accelerated cooling to the head portion of said rail at a cooling rate in the range from 1 to 30° C./sec. from the austenite temperature range to at least 550° C.

摘要翻译： 本发明是一种耐磨损性和延展性优异的珠光体钢轨道，其特征在于，在具有质量为0.65〜1.40％C的珠光体组织的钢轨中，粒径在该范围内的珠光体块的数量 至少一部分区域中，从角到顶的距离为10mm的距离，从1到15个妈妈是0.2或2以上的0.2mm 2的观察场所， 一部分; 以及具有优异的耐磨性和延展性的珠光体钢轨的制造方法，其特征在于，在所述钢轨的热轧中进行精轧，使得轨面的温度可以在850℃〜 1000℃，最终通过时的截面积减少率可以为6％以上，然后以1〜30℃/秒的冷却速度对所述导轨的头部进行加速冷却。 从奥氏体温度范围至至少550℃

公开(公告)号：US07972451B2

公开(公告)日：2011-07-05

申请号：US11780166

申请日：2007-07-19

申请人： Masaharu Ueda ,  Koichiro Matsushita ,  Kazuo Fujita ,  Katsuya Iwano ,  Koichi Uchino ,  Takashi Morohoshi ,  Akira Kobayashi

发明人： Masaharu Ueda ,  Koichiro Matsushita ,  Kazuo Fujita ,  Katsuya Iwano ,  Koichi Uchino ,  Takashi Morohoshi ,  Akira Kobayashi

IPC分类号： C22C38/02 ,  C22C38/04 ,  C21D9/04

CPC分类号： C22C38/02 ,  C21D8/00 ,  C21D8/005 ,  C21D9/04 ,  C21D2211/009 ,  C22C38/002 ,  C22C38/04 ,  C22C38/18

摘要： The present invention is: a pearlitic steel rail excellent in wear resistance and ductility, characterized in that, in a steel rail having pearlite structure containing, in mass, 0.65 to 1.40% C, the number of the pearlite blocks having grain sizes in the range from 1 to 15 μm is 200 or more per 0.2 mm2 of an observation field at least in a part of the region down to a depth of 10 mm from the surface of the corners and top of the head portion; and a method for producing a pearlitic steel rail excellent in wear resistance and ductility, characterized by, in the hot rolling of said steel rail, applying finish rolling so that the temperature of the rail surface may be in the range from 850° C. to 1,000° C. and the sectional area reduction ratio at the final pass may be 6% or more, and then applying accelerated cooling to the head portion of said rail at a cooling rate in the range from 1 to 30° C./sec. from the austenite temperature range to at least 550° C.

摘要翻译： 本发明是一种耐磨损性和延展性优异的珠光体钢轨道，其特征在于，在具有质量为0.65〜1.40％C的珠光体组织的钢轨中，粒径在该范围内的珠光体块的数量 至少在距离头部的角部和顶部的表面的深度为10mm的区域的至少一部分中，1至15μm的每0.2mm2的观察场域是200或更多的观察场域; 以及具有优异的耐磨性和延展性的珠光体钢轨的制造方法，其特征在于，在所述钢轨的热轧中进行精轧，使得轨面的温度可以在850℃〜 1000℃，最终通过时的截面积减少率可以为6％以上，然后以1〜30℃/秒的冷却速度对所述导轨的头部进行加速冷却。 从奥氏体温度范围至至少550℃

公开(公告)号：US06254696B1

公开(公告)日：2001-07-03

申请号：US09380992

申请日：1999-09-13

申请人： Masaharu Ueda ,  Kouichi Uchino ,  Katsuya Iwano ,  Akira Kobayashi

发明人： Masaharu Ueda ,  Kouichi Uchino ,  Katsuya Iwano ,  Akira Kobayashi

IPC分类号： C22C3818

CPC分类号： C21D9/04 ,  C21D2211/002 ,  C22C38/34 ,  C22C38/38

摘要： High-strength bainitic steel rails have improved resistances to surface fatigue failures and wear required of the head of rails for heavy-load service railroads. The high-strength bainitic steels rails having excellent resistances to surface fatigue failures and wear contain constituents of specific ranges and consisting of bainitic structures at least in part are characterized in that the total area occupied by carbides whose longer axes are 100 to 1000 nm in a given cross section of said bainitic structures accounts for 10 to 50 percent thereof.

摘要翻译： 高强度贝氏体钢轨具有改进的对负载服务铁路轨道头部所需的表面疲劳失效和磨损的抵抗能力。 具有优异的表面疲劳失效和耐磨性的高强度贝氏体钢轨具有特定范围的成分，并且由贝氏体结构组成，至少部分地特征在于，长轴为100〜1000nm的碳化物占据的总面积为 所述贝氏体结构的横截面占10％至5​​0％。

公开(公告)号：US07828917B2

公开(公告)日：2010-11-09

申请号：US10585472

申请日：2005-01-07

申请人： Noriaki Onodera ,  Takuya Satoh ,  Masaharu Ueda ,  Kazuo Fujita ,  Akira Kobayashi

发明人： Noriaki Onodera ,  Takuya Satoh ,  Masaharu Ueda ,  Kazuo Fujita ,  Akira Kobayashi

IPC分类号： C21D9/04 ,  C21D9/06

CPC分类号： C21D9/06 ,  B21B1/085 ,  B21B2045/0254 ,  C21D1/84 ,  C21D9/04

摘要： A rail manufacturing method is provided, in which a billet is hot-rolled into a rail form and the rail is cooled to ambient temperature. The foot part of the rail can be mechanically restrained to improve the straightness of the rail during at least the period of cooling where the surface temperature is between 800° C. and 400° C. In the subsequent cooling process, at least while the surface temperature of the foot of the rail is between 400° C. and 250° C., the rail is kept in an upright state, and cooled naturally without using insulation or accelerated cooling.

摘要翻译： 提供了一种轨道制造方法，其中坯料被热轧成轨道形式并且轨道被冷却到环境温度。 轨道的脚部可以被机械地约束，以至少在表面温度在800℃和400℃之间的冷却期间提高轨道的平直度。在随后的冷却过程中，至少在表面 导轨脚的温度在400°C到250°C之间，轨道保持直立状态，并自然冷却而不使用绝缘或加速冷却。

公开(公告)号：US20090014099A1

公开(公告)日：2009-01-15

申请号：US10585472

申请日：2005-01-07

申请人： Noriaki Onodera ,  Takuya Satoh ,  Masaharu Ueda ,  Kazuo Fujita ,  Akira Kobayashi

发明人： Noriaki Onodera ,  Takuya Satoh ,  Masaharu Ueda ,  Kazuo Fujita ,  Akira Kobayashi

IPC分类号： C21D8/00

CPC分类号： C21D9/06 ,  B21B1/085 ,  B21B2045/0254 ,  C21D1/84 ,  C21D9/04

摘要： A rail manufacturing method is provided, in which a billet is hot-rolled into a rail form and the rail is cooled to ambient temperature. The foot part of the rail can be mechanically restrained to improve the straightness of the rail during at least the period of cooling where the surface temperature is between 800° C. and 400° C. In the subsequent cooling process, at least while the surface temperature of the foot of the rail is between 400° C. and 250° C., the rail is kept in an upright state, and cooled naturally without using insulation or accelerated cooling.

摘要翻译： 提供了一种轨道制造方法，其中坯料被热轧成轨道形式并且轨道被冷却至环境温度。 轨道的脚部可以被机械地约束，以至少在表面温度在800℃和400℃之间的冷却期间提高轨道的平直度。在随后的冷却过程中，至少在表面 导轨脚的温度在400°C到250°C之间，轨道保持直立状态，并自然冷却而不使用绝缘或加速冷却。

公开(公告)号：US08361246B2

公开(公告)日：2013-01-29

申请号：US13131804

申请日：2010-08-13

申请人： Masaharu Ueda ,  Kyohei Sonoyama ,  Takuya Tanahashi ,  Teruhisa Miyazaki ,  Katsuya Iwano

发明人： Masaharu Ueda ,  Kyohei Sonoyama ,  Takuya Tanahashi ,  Teruhisa Miyazaki ,  Katsuya Iwano

IPC分类号： C22C38/02 ,  C22C38/04

CPC分类号： C22C38/02 ,  C21D9/04 ,  C21D2211/004 ,  C21D2211/009 ,  C21D2221/00 ,  C21D2221/02 ,  C22C38/04

摘要： A pearlite rail contains, by mass %, 0.65 to 1.20% of C; 0.05 to 2.00% of Si; 0.05 to 2.00% of Mn; and the balance composed of Fe and inevitable impurities, wherein at least part of the head portion and at least part of the bottom portion has a pearlite structure, and the surface hardness of a portion of the pearlite structure is in a range of Hv320 to Hv500 and a maximum surface roughness of a portion of the pearlite structure is less than or equal to 180 μm.

摘要翻译： 珠光体铁质量以质量％计含有C = 0.65〜1.20％ 0.05〜2.00％的Si; 0.05〜2.00％的Mn; 所述余量由Fe和不可避免的杂质组成，其中头部的至少一部分和底部的至少一部分具有珠光体组织，珠光体组织的一部分的表面硬度在Hv320〜Hv500的范围内 并且珠光体组织的一部分的最大表面粗糙度小于或等于180μm。

公开(公告)号：US10144983B2

公开(公告)日：2018-12-04

申请号：US14119819

申请日：2012-05-23

申请人： Kenichi Karimine ,  Masaharu Ueda ,  Katsuya Iwano ,  Hideo Tottori ,  Takeshi Yamamoto

发明人： Kenichi Karimine ,  Masaharu Ueda ,  Katsuya Iwano ,  Hideo Tottori ,  Takeshi Yamamoto

IPC分类号： C21D9/04 ,  B23K31/02 ,  C21D1/30 ,  C21D9/50 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  B23K101/26 ,  B23K103/04

摘要： A method of reheating a rail weld zone after rails were welded, a distance C between a reheating region P of a rail web portion 2 and a welding center Q is set to more than or equal to 0.2 times and less than or equal to three times a HAZ length Lh of the rail weld zone. A length B of the reheating region P may be more than or equal to 0.5 times and less than or equal to five times the HAZ length Lh of the rail weld zone. A height A of the reheating region P may be more than or equal to 0.2 times a height Hw of the rail web portion 2. A temperature Th reached in a reheating process at a center of the reheating region P may be higher than or equal to 400° C. and lower than or equal to 750° C.

公开(公告)号：US20120015212A1

公开(公告)日：2012-01-19

申请号：US13138791

申请日：2010-03-30

申请人： Kenichi Karimine ,  Masaharu Ueda ,  Katsuya Iwano ,  Seiji Sugiyama

发明人： Kenichi Karimine ,  Masaharu Ueda ,  Katsuya Iwano ,  Seiji Sugiyama

IPC分类号： B32B15/00 ,  F28F7/00 ,  F28F27/00

CPC分类号： E01B29/44 ,  B23K11/04 ,  B23K23/00 ,  B23K31/02 ,  B23K2101/26 ,  B23K2103/04 ,  C21D9/04 ,  C21D9/505 ,  C21D11/005 ,  C21D2211/009 ,  C21D2221/00 ,  C22C1/02 ,  E01B11/46 ,  Y10T428/12951

摘要： The invention provides a method of cooling a rail weld zone. The method includes a first rail web portion cooling process of cooling a rail web portion cooling region of the rail weld zone in a part of a temperature range until the completion of transformation from austenite to pearlite, a second rail web portion cooling process of cooling the rail web portion cooling region after the entire rail web portion of the rail weld zone is transformed to pearlite, a foot portion cooling process of cooling a foot portion of the rail weld zone, and a head portion cooling process of cooling a head portion of the rail weld zone. When cooling time of the first and second rail web portion cooling processes is t minute, a k value satisfies an expression represented as −0.1t+0.63≦k≦−0.1t+2.33.

摘要翻译： 本发明提供了一种冷却钢轨焊接区域的方法。 该方法包括在一段温度范围内冷却轨道焊接区域的轨道网部分冷却区域直到从奥氏体向珠光体转变为完成的第一轨道网部分冷却过程， 在轨道焊接区域的整个轨道腹板部分之后的轨道网部分冷却区域转变为珠光体，用于冷却轨道焊接区域的脚部的脚部冷却过程，以及冷却头部部分的头部冷却过程 铁路焊接区。 当第一和第二轨道部分冷却过程的冷却时间为t分钟时，k值满足表示为-0.1t + 0.63＆nlE; k＆nlE; -0.1t + 2.33的表达式。

公开(公告)号：US20110226389A1

公开(公告)日：2011-09-22

申请号：US13131804

申请日：2010-08-13

申请人： Masaharu Ueda ,  Kyohei Sonoyama ,  Takuya Tanahashi ,  Teruhisa Miyazaki ,  Katsuya Iwano

发明人： Masaharu Ueda ,  Kyohei Sonoyama ,  Takuya Tanahashi ,  Teruhisa Miyazaki ,  Katsuya Iwano

IPC分类号： C22C38/20 ,  C22C38/00

CPC分类号： C22C38/02 ,  C21D9/04 ,  C21D2211/004 ,  C21D2211/009 ,  C21D2221/00 ,  C21D2221/02 ,  C22C38/04

摘要： A pearlite rail contains, by mass %, 0.65 to 1.20% of C; 0.05 to 2.00% of Si; 0.05 to 2.00% of Mn; and the balance composed of Fe and inevitable impurities, wherein at least part of the head portion and at least part of the bottom portion has a pearlite structure, and the surface hardness of a portion of the pearlite structure is in a range of Hv320 to Hv500 and a maximum surface roughness of a portion of the pearlite structure is less than or equal to 180 μm.

摘要翻译： 珠光体铁质量以质量％计含有C = 0.65〜1.20％ 0.05〜2.00％的Si; 0.05〜2.00％的Mn; 所述余量由Fe和不可避免的杂质组成，其中头部的至少一部分和底部的至少一部分具有珠光体组织，珠光体组织的一部分的表面硬度在Hv320〜Hv500的范围内 并且珠光体组织的一部分的最大表面粗糙度小于或等于180μm。

公开(公告)号：US20140087320A1

公开(公告)日：2014-03-27

申请号：US14119819

申请日：2012-05-23

申请人： Kenichi Karimine ,  Masaharu Ueda ,  Katsuya Iwano ,  Hideo Tottori ,  Takeshi Yamamoto

发明人： Kenichi Karimine ,  Masaharu Ueda ,  Katsuya Iwano ,  Hideo Tottori ,  Takeshi Yamamoto

IPC分类号： C21D9/04

CPC分类号： C21D9/04 ,  B23K31/02 ,  B23K2101/26 ,  B23K2103/04 ,  C21D1/30 ,  C21D9/50 ,  C21D2221/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18

摘要： A method of reheating a rail weld zone after rails were welded, a distance C between a reheating region P of a rail web portion 2 and a welding center Q is set to more than or equal to 0.2 times and less than or equal to three times a HAZ length Lh of the rail weld zone. A length B of the reheating region P may be more than or equal to 0.5 times and less than or equal to five times the HAZ length Lh of the rail weld zone. A height A of the reheating region P may be more than or equal to 0.2 times a height Hw of the rail web portion 2. A temperature Th reached in a reheating process at a center of the reheating region P may be higher than or equal to 400° C. and lower than or equal to 750° C.

摘要翻译： 在焊接轨道之后再次加热钢轨焊接区域的方法，将铁轨腹板部分2的再加热区域P与焊接中心Q之间的距离C设定为大于或等于0.2倍且小于或等于三倍 轨道焊接区的HAZ长度Lh。 再加热区域P的长度B可以大于或等于轨道焊接区域的HAZ长度Lh的0.5倍且小于或等于五倍。 再加热区域P的高度A可以大于或等于轨道腹板部分2的高度Hw的0.2倍。再加热区域P的中心处的再加热过程中达到的温度Th可以高于或等于 400℃，低于或等于750℃