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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2010

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Abrasive wear of railway sections of steel with a different pearlite morphology in railroad switches

Herian J., Aniołek K.

Journal of Achievements in Materials and Manufacturing Engineering

2010

Vol. 43, nr 1

236-243

Purpose: The analyse of pearlite morphology changes as a result of hot rolling process and isothermal annealing. Design/methodology/approach: Physical modelling of isothermal annealing for a transition point of 520-620°C was carried out using a Gleeble simulator. A scanning electron microscope was used for a quantitative evaluation of the microstructure. Tests of resistance to abrasive wear were carried out at the Amsler stand. Findings: The obtained test results confirm that these methods can be effectively used in shaping the pearlitic structure and properties of the steel. Practical implications: In physical modelling of tests of resistance to abrasive wear for the steel grade R260 after hot rolling and isothermal annealing it has been proved that this feature is a function of the steel structure and properties in the given operation conditions. The resistance to abrasive wear of steel R260 with a pearlitic structure and different pearlite morphology decreases with the increase of load and slide. Originality/value: An advantageous pearlitic morphology of steel (block sections) with interlamellar distance in the order of 0.12-0.13 microm, ensuring hardness of about 340-350 HB, is facilitated by a hot rolling process combined with isothermal annealing.