Invention Grant
- Patent Title: High carbon steel rail with enhanced ductility
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Application No.: US14255693Application Date: 2014-04-17
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Publication No.: US09670570B2Publication Date: 2017-06-06
- Inventor: Joseph Victor Kristan , Gregory Ryan Lehnhoff , Mark David Richards
- Applicant: EVRAZ Inc. NA Canada
- Applicant Address: CA Regina, Saskatchewan
- Assignee: EVRAZ INC. NA CANADA
- Current Assignee: EVRAZ INC. NA CANADA
- Current Assignee Address: CA Regina, Saskatchewan
- Agency: Pearne & Gordon LLP
- Main IPC: C22C38/02
- IPC: C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/14 ; C22C38/20 ; C22C38/22 ; C22C38/24 ; C22C38/26 ; C22C38/28 ; C22C38/30 ; C22C38/32 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/52 ; C22C38/54 ; C21D1/18 ; C21D6/00 ; C21D8/00 ; C21D9/04 ; C21D1/06 ; C22C38/00

Abstract:
This invention relates to a high carbon steel rail with enhanced ductility comprising 0.65-1.4 mass % of carbon, 0.1-1.5 mass % of silicon, 0.01-0.4 mass % of manganese, 0.1-1.5 mass % of chromium, and 0.005-0.05 mass % of titanium, with additional allowances for Mo, Nb, V, Cu, M, Co, B, N, Ca, Mg, Zr, Al, and W, with the remainder comprising iron and the inevitable impurities, that displays a head surface hardness of at least 325 HB and a microstructure comprising at least 90% pearlite at a depth of between 2-20 mm below the rail head surface. The invention also relates to the process for manufacturing the high carbon steel rail with enhanced ductility.
Public/Granted literature
- US20150299832A1 HIGH CARBON STEEL RAIL WITH ENHANCED DUCTILITY Public/Granted day:2015-10-22
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