Abstract
A study on the pitting resistance of white cast iron containing 1.1-2.8%C, which was cast or forged, was carried out by performing experiments using an Amslar-type wear testing machine under sliding conditions with light oil as a lubricant.
The results obtained are summarized as follows:
(1) Pitting resistance of white cast iron which contains higher carbon (C>1.8%) is significantly improved by forging.
(2) The most hardened layer generated by repeating contact stresses exists in 0.10∼0.20mm below the contact surface. The higher the contact stress is, the more the hardness increment of the hardened layer is.
(3) It seems that the propagation of crack is strikingly affected by the shape of large-size carbide and the adhesive strength between carbide and matrix.
