Welding of an element of a track unit and a rail section without adding any material

• US 20060011732A1
• Filed: 05/23/2003
• Published: 01/19/2006
• Est. Priority Date: 06/05/2002
• Status: Abandoned Application

• Current Assignee: Vossloh Cogifer
• Original Assignee: Vossloh Cogifer
• Inventors: Mugg, Philippe, Baumert, Serge
• Application Number:
  US10/516,913
• Publication Number:
  US 20060011732A1
• Time in Patent Office: Days
• US Class Current: 238/310
• CPC Class Codes: B23K 11/04 Flash butt welding
• CPC Class Codes: C22C 38/02 containing silicon
• CPC Class Codes: C22C 38/22 with molybdenum or tungsten
• CPC Class Codes: C22C 38/38 with more than 1.5% by weight of manganese
• CPC Class Codes: C22C 38/60 containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
• CPC Class Codes: E01B 11/50 Joints made by electric welding
• CPC Class Codes: E01B 7/12 Fixed frogs made of one part or composite

Abstract

The stretch of rail comprises a railway switch element (12) made from high-alloy steel, in which at least one alloy element has a content equal to at least 5% by weight, and a length of rail (14) made from steel, connected to one another by a weld without deposition of metal. The length of rail (14) is formed from a medium-alloy low-carbon steel of which the carbon content is less than 0.55% by weight.

Claims

1. Stretch of rail comprising a railway switch element (12) made from high-alloy steel, in which at least one alloy element has a content equal to at least 5% by weight, and a length of rail (14) made from medium-alloy steel, directly connected to one another by a weld without deposition of metal, characterised in that the length of rail (14) is formed from a medium-alloy low-carbon steel in which the carbon content is less than 0.55% by weight.

2. Stretch of rail as claimed in claim 1, characterised in that the length of rail (14) is formed from a medium-alloy low-carbon steel in which the carbon content is less than 0.5% by weight.

3. Stretch of rail as claimed in claim 1, characterised in that medium-alloy low-carbon steel forming the length of rail is a bainitic steel.

4. Stretch of rail as claimed in claim 3, characterised in that the medium-alloy low-carbon steel is a bainitic steel without carbide.

5. Stretch of rail as claimed in claim 1, characterised in that the medium-alloy low-carbon steel forming the length of rail has the following composition by weight:

0.05% to 0.50% of carbon;

0.5% to 2.5% of manganese;

0.6% to 3% of silicon or aluminium;

0.25% to 3.1% of chromium; and

0% to 0.9% of molybdenum.

6. Stretch of rail as claimed in claim 5, characterised in that the medium-alloy low-carbon steel forming the length of rail has a composition defined below:

0.28% to 0.36% of carbon;

1.40% to 1.70% of manganese;

at most 0.03% of phosphorus;

0.01% to 0.03% of sulphur;

at most 0.005% of aluminium;

1% to 1.40% of silicon;

0.40% to 0.60% of chromium;

0.08% to 0.20% of molybdenum;

at most 0.04% of titanium; and

at most 0.004% of boron.

7. Stretch of rail as claimed in claim 1, characterised in that the railway switch element made from high-alloy steel comprises 12% to 14% by weight of manganese.