公开(公告)号：EP2447383A1

公开(公告)日：2012-05-02

申请号：EP10791775.9

申请日：2010-04-14

申请人： Nippon Steel Corporation

发明人： MIYAZAKI, Teruhisa ,  UEDA, Masaharu ,  YOSHIDA, Suguru

IPC分类号： C22C38/00 ,  C21D8/00 ,  C22C38/14 ,  C21D9/04

CPC分类号： C21D9/04 ,  C21D8/00 ,  C21D8/005 ,  C21D8/0226 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

摘要： This high-carbon pearlitic steel rail having excellent ductility, includes: in terms of percent by mass, C: more than 0.85% to 1.40%; Si: 0.10% to 2.00%; Mn: 0.10% to 2.00%; Ti: 0.001 % to 0.01 %; V: 0.005% to 0.20%; and N: less than 0.0040%, with the balance being Fe and inevitable impurities, wherein contents of Ti and V fulfill the following formula (1), and a rail head portion has a pearlite structure. 5 ≤ V % by mass / Ti % by mass ≤ 20

摘要翻译： 这种具有优异延展性的高碳珠光体钢轨包括：以质量％计，C：大于0.85％至1.40％; Si：0.10〜2.00％; Mn：0.10〜2.00％ Ti：0.001〜0.01％ V：0.005〜0.20％ 和N：小于0.0040％，余量为Fe和不可避免的杂质，Ti和V的含量满足下式（1），轨头部具有珠光体组织。 5‰¤V％质量/ Ti％质量‰¤20

公开(公告)号：EP3249070B1

公开(公告)日：2020-03-18

申请号：EP16740299.9

申请日：2016-01-22

申请人： Nippon Steel Corporation

发明人： UEDA, Masaharu ,  YAMAMOTO, Takeshi ,  MIYAZAKI, Teruhisa

IPC分类号： C22C38/00 ,  C22C38/04 ,  C22C38/58 ,  E01B5/02 ,  C21D8/00 ,  C21D9/04 ,  C22C38/10

公开(公告)号：EP3940090A1

公开(公告)日：2022-01-19

申请号：EP20774132.3

申请日：2020-03-02

申请人： NIPPON STEEL CORPORATION

发明人： UEDA, Masaharu ,  MIYAZAKI, Teruhisa ,  TANAHASHI, Takuya ,  MAEDA, Yusuke

IPC分类号： C21D8/00 ,  C21D9/04 ,  C22C38/00 ,  C22C38/58

摘要： A rail including a predetermined chemical composition is provided, in which 90 area% or greater of a metallographic structure in a cross section of a rail web portion is a pearlite structure, a minimum value of a hardness in the cross section of the rail web portion is Hv 300 or greater, and a difference between a maximum value and the minimum value of the hardness in the cross section of the rail web portion is Hv 40 or less.