xmlui.ArtifactBrowser.SimpleSearch.filter.source:Scientific papers of the University of Pardubice. Series B, Jan Perner Transport Faculty. 14 (2008)
ISSN:1211-6610
Abstract:
These presented work is dealing with a specific structural changes of the Hadfielďs steel
caused by the thermal and stress influence after used welding technology crossing parts to carbon
steel rail.
The target of the performed analyses was to find out the source of damage along weld lines,
which are explored on the surface of the welded rail profiles by capillary test, performed after
machining weld joints.
Hadfielďs high manganese steel is unique in the fact that it combines high toughness and
ductility with great work-hardening capacity. The wear resistance in rail-wheel contact depends on the
surface hardening intensity before operation, and hardening process during operation consequently.
Abrasion resistance tends to increase with carbon, but above 1.4% causes a difficulty with obtaining
a homogeneous austenitic structure which would be sufficiently free of carbides bordered grains. They
are detrimental to strength and ductility.