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THE INFLUENCE OF AFFECTED LAYER OF EDM ON THE WEAR CHARACTERISTICS OF CEMENTED TUNGSTEN CARBIDE
K. ISHIKAWA,A. IWABUCHI,T. SHIMIZU 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
This paper describes the wear characteristics of WC-Co cemented carbides machined with Wire-cut or Die-sinking EDM. We prepared the specimens with different grades of grinding to remove the affected layer after the EDM. These specimens were experimented by block-an-cylinder type tribometer. The result indicated that although the hardness of the affected layer was lower than that of the bulk, wear resistance was increased. In order to investigate the cause of the increase in wear resistance of the affected layer, the layer was observed and analyzed by SEM and ESCA. We also discussed the mean free path of Co phase.