Oxidation of ultrafine-cemented carbide prepared from nanocrystalline WC-10Co composite powder

摘要

The oxidation behavior and associated properties, phases and microstructure of ultrafine WC-10Co-cemented carbide using WC-10Co nanocomposite powder prepared by spray pyrolysis-continuous reduction and carbonization technology, were investigated in the 450-700 deg C temperature range at 50 deg C intervals. The results showed that the working temperature of the cutting edge should be lower than 550 deg C in air without coolant in order to assure the lifespan and working efficiency of ultrafine WC-10Co-cemented carbide materials as cutting tools.