Wear mechanisms in cutting of cast iron : V. Richter. (Fraunhofer Inst. for Ceramics and Sintered Materials, Dresden, Germany)

Abstract

The abrasive wear behavior of ductile cast iron with four different matrix microstructures was determined by the pin-on-disc abrasion test, the three-body abrasion test and the impact three-body abrasion test. The results indicate that the abrasive wear resistance of ductile cast iron tested in pin-on-disc abrasion and three-body abrasion is approximately linearly proportional to its hardness, so that the abrasive wear resistance of martensitic matrix ductile cast iron and martensitic matrix with dispersed eutectic carbide ductile cast iron is the best, followed by the bainitic matrix, with the pearlitic matrix being the worst. However, under the conditions of the impact three-body abrasion test, the abrasive wear resistance of ductile cast iron has a relationship to its hardness and toughness, i.e. it requires the appropriate combination of its hardness and toughness. Therefore, the abrasive wear resistance of martensitic matrix ductile cast iron is the best, the pearlitic and the bainitic matrix being the next best, with the martensitic matrix with eutectic carbides being the worst.