Abstract
In order to study the formation of white etching layer (WEL) in a wheel steel with high Si and Mn contents (denoted as HiSi), a finite element model incorporated with phase transformation is built. The heating rate and phase dependent material properties are considered in the simulation. The simulated results of HiSi steel are compared with that of a traditional ER8 wheel steel. It can be seen that the simulated results well agree with those found in full-scale railway wheel flat experiments. The WEL formation during wheel sliding is hardly influenced by the thermal properties of wheel steels, while the austenitization temperature at high heating rate plays a major role in a short sliding time. Although HiSi and ER8 wheel steels have close austenitization temperature at low heating rate, HiSi steel exhibits an obvious higher austenitization temperature at high heating rate, which leads to a better resistance to WEL formation.
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