Invention Grant
- Patent Title: Rail
- Patent Title (中): 轨
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Application No.: US14406300Application Date: 2013-06-13
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Publication No.: US09534278B2Publication Date: 2017-01-03
- Inventor: Masaharu Ueda , Teruhisa Miyazaki
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2012-134442 20120614
- International Application: PCT/JP2013/066335 WO 20130613
- International Announcement: WO2013/187470 WO 20131219
- Main IPC: C22C38/24
- IPC: C22C38/24 ; C21D9/04 ; C22C38/04 ; C22C38/02 ; C22C38/12 ; C22C38/14 ; C22C38/18 ; C22C38/26 ; C22C38/00 ; C22C38/06 ; C22C38/08 ; C22C38/10 ; C22C38/16 ; E01B5/02
Abstract:
A rail is provided in which in a range from a surface of a head of the rail to a depth of 30 mm, 95% or more of a structure is composed of a pearlite structure by area %, and in a range with a depth of 20 mm to 30 mm from the surface of the head of the rail, an average grain size of a pearlite block in a transverse section is 120 μm to 200 μm.
Public/Granted literature
- US20150136864A1 RAIL Public/Granted day:2015-05-21
Information query
