Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NKK CorpfiledCriticalNKK Corp
Publication of CA2152877A1publicationCriticalpatent/CA2152877A1/en
Application grantedgrantedCritical
Publication of CA2152877CpublicationCriticalpatent/CA2152877C/en
There is provided a rail of high toughness and high wear resistance, consisting essentially of 0.2 to 0.5 wt% of C, 0.1 to 2.0 wt% of Si, 1.0 to 3.0 wt% of Mn, 0.035 wt% or less of P, 0.035 wt% or less of S, 0.3 to 4.0 wt% of Cr, and the balance of iron and inevitable impurities. The rail has a metal structure of a bainite structure, a hardness of 400 Hv or more at each of a head top portion and a head corner portion thereof, a tensile strength of 1200 MPa or more, and a 2 mm, U-notch Charpy absorbed energy of 30 J or more at +20°C.
CA 21528771994-09-271995-06-28Rail excellent in toughness and wear resistance and method of manufacturing same
Expired - Fee RelatedCA2152877C
(en)