稀土硬质合金的发展现状

CurrentdevelopmentstatusofrareearthcementedcarbidesZONGXiaLUYuxiangDept.ofMaterialsEngineering,ChinaUniversityofPetroleum(EastChina),Dongying257061,Shandong,ChinaAbstractRareearthmetalsandtheircompoundshavemanyexcellentproperties,andtheadditionofrareearthelementsinacertainwayintotheconventionalcementedcarbidecanimprovesuchpropertiesastough-ness,bendingstrengthandhardness.Therefore,therareearthalloyplaysauniqueroleinallfieldsofthemod-ernscientifictechnology,especiallyinthemanufacturingofmodernmachinerytools.Inthepaper,thecurrentdevelopmentstatusofrareearthcementedcarbideswasreviewed,includingtheaffectingmechanismofrareearthelements,theireffectsonmicrostructureandproperties,theformandtechniqueofadditionofrareearthelementsandsoon.Atthesametime,theproblemsandpossiblesolutionsduringcurrentdevelopmentofrareearthcementedcarbideswerealsoinvolved.Keywordsrareearth;cementedcarbide;currentdevelopmentstatusαεαααεαααμμμμμμμα