WO2004014708A2 - Procede de reparation d'un rail - Google Patents

Procede de reparation d'un rail Download PDF

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Publication number
WO2004014708A2
WO2004014708A2 PCT/US2003/024710 US0324710W WO2004014708A2 WO 2004014708 A2 WO2004014708 A2 WO 2004014708A2 US 0324710 W US0324710 W US 0324710W WO 2004014708 A2 WO2004014708 A2 WO 2004014708A2
Authority
WO
WIPO (PCT)
Prior art keywords
rail
void
weld
molten metal
defect
Prior art date
Application number
PCT/US2003/024710
Other languages
English (en)
Other versions
WO2004014708A3 (fr
Inventor
Daniel J. Coomer
Original Assignee
Holland Lp
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 Holland Lp filed Critical Holland Lp
Priority to AU2003261431A priority Critical patent/AU2003261431A1/en
Publication of WO2004014708A2 publication Critical patent/WO2004014708A2/fr
Publication of WO2004014708A3 publication Critical patent/WO2004014708A3/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B11/00—Rail joints
    • E01B11/44—Non-dismountable rail joints; Welded joints
    • E01B11/50—Joints made by electric welding

Definitions

  • a railroad rail 10 is typically fonned having a base 12 with opposed flanges 14, 16, an upstanding web 18 extending upward from the base 12 between the flanges 14, 16 and a head 2O at the top of the web.
  • the repair system or method begins when a rail defect is identified and located, such as by using an ultrasonic rail-testing car.
  • the ultrasonic rail-testing car can precisely locate and mark the area of the rail containing the defect. Additionally, manual testing of the defect may further delineate the areas of the rail which contain the defect. The ultrasonic testing can confirm that the defect is totally contained in the top portion of the rail 10. The top portion of the rail 10 is then removed, as more fully described below.
  • the weld electrode selected can be of the solid electrode type.
  • the electrode produces a weld deposit having a carbon content between .60% and .85% by weight.
  • rail steel has a carbon content of about .84%.
  • Appropriate alloying elements are also used in the weld rod or electrode.
  • the weld electrode with the above carbon content and selected alloying can produce a weld with adequate bulk hardness and essentially stop migration of carbon from the rail.
  • crack susceptibility drops while in excess of .85%, the crack susceptibility again rises.
  • Hydrogen embrittlement can cause steel to lose ductibility and impact values and in general degrades mechanical properties. Hydrogen embrittlement is to be avoided.
  • GMAW with inert gas shielding protects the weld pool from atmospheric hydrogen.
  • the solid electrode can be treated for removal of hydrogen.
  • About 8- 15 passes can be used to fill a 0.75 inch deep groove which is one inch wide.
  • the welding voltage is about 27-30V.
  • the wire feed speed is about 200-250ipm.
  • the travel speed is about 15-20ipm.
  • the resulting amperage is about 275-325A.
  • a weave is used to improve penetration and tie-in.
  • a post purge is used to shield the molten metal until it is solidified.
  • the WDU is removed from the rail.
  • the WCD is removed from the rail.
  • the weld can then be finished ground to match the contour of the rail.
  • U.S. Patent 6,396,020 is incorporated by reference as if fully set forth herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

L'invention concerne un système ou un procédé de réparation de rails de chemin de fer comprenant un champignon, des parties âme et base. Ledit procédé consiste en au moins les étapes suivantes : identification et localisation d'un défaut dans le rail ; suppression du défaut par enlèvement de matière du rail entourant le défaut dans au moins la partie champignon, de sorte qu'un vide et une interface de vide soient formés alors que la continuité du rail est maintenue ; remplissage du vide de métal fondu et induction de la liaison du métal fondu et de l'interface de vide du rail. Le métal fondu peut être produit par soudage à l'arc sous protection gazeuse. La teneur en carbone du métal fondu est la même que celle du rail.
PCT/US2003/024710 2002-08-09 2003-08-08 Procede de reparation d'un rail WO2004014708A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003261431A AU2003261431A1 (en) 2002-08-09 2003-08-08 Method of repairing a rail

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40218402P 2002-08-09 2002-08-09
US60/402,184 2002-08-09

Publications (2)

Publication Number Publication Date
WO2004014708A2 true WO2004014708A2 (fr) 2004-02-19
WO2004014708A3 WO2004014708A3 (fr) 2004-07-22

Family

ID=31715802

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/024710 WO2004014708A2 (fr) 2002-08-09 2003-08-08 Procede de reparation d'un rail

Country Status (2)

Country Link
AU (1) AU2003261431A1 (fr)
WO (1) WO2004014708A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7123990B2 (en) 2000-06-02 2006-10-17 Holland L.P. Gap welding process
WO2015084722A1 (fr) * 2013-12-06 2015-06-11 Caterpillar Inc. Système et procédé pour réparation d'élément moulé
EP3258011A1 (fr) * 2016-06-16 2017-12-20 VolkerRail Nederland BV Procédé de réparation sur place de rails de chemin de fer
CN112872708A (zh) * 2021-01-24 2021-06-01 南京波亚登汽车用品有限公司 一种火车钢轨检修更换装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1240092A (en) * 1917-04-23 1917-09-11 George H Ricke Rail-joint.
US2238836A (en) * 1936-10-02 1941-04-15 Firm Langschienen Ges M B H Rail joint
US5605283A (en) * 1991-12-03 1997-02-25 Fronius Schweissmaschinen Kg. Austria Weld joint between two rails arranged behind each other along a rail track
US6407364B1 (en) * 1999-07-19 2002-06-18 Lincoln Global, Inc. Method and system for welding railroad rails

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1240092A (en) * 1917-04-23 1917-09-11 George H Ricke Rail-joint.
US2238836A (en) * 1936-10-02 1941-04-15 Firm Langschienen Ges M B H Rail joint
US5605283A (en) * 1991-12-03 1997-02-25 Fronius Schweissmaschinen Kg. Austria Weld joint between two rails arranged behind each other along a rail track
US6407364B1 (en) * 1999-07-19 2002-06-18 Lincoln Global, Inc. Method and system for welding railroad rails

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7123990B2 (en) 2000-06-02 2006-10-17 Holland L.P. Gap welding process
WO2015084722A1 (fr) * 2013-12-06 2015-06-11 Caterpillar Inc. Système et procédé pour réparation d'élément moulé
EP3258011A1 (fr) * 2016-06-16 2017-12-20 VolkerRail Nederland BV Procédé de réparation sur place de rails de chemin de fer
CN112872708A (zh) * 2021-01-24 2021-06-01 南京波亚登汽车用品有限公司 一种火车钢轨检修更换装置

Also Published As

Publication number Publication date
WO2004014708A3 (fr) 2004-07-22
AU2003261431A8 (en) 2004-02-25
AU2003261431A1 (en) 2004-02-25

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