Embrittlement of welded joints of tram rails in city environments

This paper concerns the issue of cracking of thermite-welded tram rails. The work presents cases of rail cracking revealed directly after welding or after a short period of track operation. The results of static strength tests, resistance to brittle cracking tests, microstructure and chemical composition examinations of a rail that cracked after thermite welding are discussed. It is emphasised that the main cause of occurrence of cracks in the area of rail web is thermal (welding) stresses. Non-metallic inclusions, the presence of hydrogen in the rail and the influence of an active environment were pointed out as factors conducive to the occurrence of brittle cracks.

Language

  • English

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Filing Info

  • Accession Number: 01677969
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 1 2018 4:52PM