Mark S Richards

Address:

15407 Frst Peak, Hl Cntry Vlg, TX 78232

VIN:

5TFRV58187X014068

Make:

TOYOTA

Model:

TUNDRA

Year:

2007

US Patent:

20150299832, Oct 22, 2015

Filed:

Apr 17, 2014

Appl. No.:

14/255693

Inventors:

- Regina, CA
Gregory Ryan Lehnhoff - Monument CO, US
Mark David Richards - Pueblo West CO, US

Assignee:

EVRAZ Inc. NA Canada - Regina

International Classification:

C22C 38/54
C21D 9/04
C21D 1/06
C21D 1/18
C22C 38/52
C22C 38/50
C22C 38/48
C22C 38/46
C22C 38/44
C22C 38/42
C22C 38/32
C22C 38/30
C22C 38/28
C22C 38/26
C22C 38/24
C22C 38/22
C22C 38/20
C22C 38/06
C22C 38/04
C22C 38/02
C22C 38/00
C21D 8/00

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.