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Influence of the microstructure of cast iron on the rheological properties of frictional contact and wear-resistance

Shevelya V., Orłowicz W., Trytek A., Kirilkov V.

Archives of Foundry Engineering

2010

Vol. 10, iss. 1 spec.

273--278

The influence of sliding speed and contact load on wear-resistance of cast iron in the unhardened state (cast without heat treatment) and in the state after surface hardening by electroarc plasma (GTAW method) is investigated. This method provides formation of composite hardening structure in the process of fast crystallization. It is shown, that during friction of hardened cast iron the contribution of mechanical-thermal hardening with simultaneous development of relaxation processes prevails over mechanical peening. It provides high level and stability of wear-resistance.

Effect of the concentrated heat flow treatment on the structure and the antiwear properties of cast iron

Orłowicz W., Shevelya V., Trytek A., Kirilkov V.

Archives of Foundry Engineering

2009

Vol. 9, iss. 2

185-188

The influence of modes of surface fusion by electric arc plasma (GTAW method) on the hardness and wear-resistance of plain cast iron was studied. A possible mechanism of structural rearrangement in the processed material during the friction was analyzed. This mechanism is determined by specific behaviour of hardened martensitic structure under dynamic load. This martensitic structure forms a metal basis of cementite eutectic under conditions of fast crystallisation.