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.