STEEL ABRASIVE WEAR FORECASTING BY WEARING SURFACES MICROGEOMETRIC PARAMETERS
Article presents varying hardness of low carbon Hardox 400, medium-carbon 45 and carboniferous 65G steels, wear surfaces the microgeometric characteristics analysis. Steels are thermally processed to reach their maximum hardness range. Wear by fixed abrasive research was performed according the ASTM G 132 – 96 (2007), by using friction pair type „pin–on–drum“. Established wear, which was evaluated in connection with the study used steel hardness, wear trace roughness, profile tops angles.
The research result established that with wear by fixed abrasive low carbon steels wear can be predicted from their hardness and wearing surface roughness, medium carbon steel – hardness and wearing surface profile tops angles, carbon steel – wearing surface roughness and wearing surface profile tops angles Θ. These parameters interconnection is linear. This latter evaluation is highly reliable, linear characteristic I = –0.024Θ + 1.24, R2 = 0.95.These results give opportunity to compare equal composition, but different steel hardness, used by the same abrasive wear conditions, wear, when are available different estimation criteria – hardness, roughness and wearing surface profile tops angles Θ.