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WC-10Co nanocrystalline composite powders prepared by spray pyrogenation-continuous reduction and carburization technology were consolidated by vacuum sintering plus hot isostatic pressing (HIP). Influences of carbon content on properties and microstructure of ultrafine WC-10Co cemented carbide were investigated. The results show that the relative density of the ultrafine WC-10Co cemented carbides can reach 99.72%,and the transverse rupture strength (TRS) was higher than 3 890 MPa,Rockwell A hardness (HRA) was higher than 92.5,the average grain size was less than 460 nm,when carbon content in nanocrystalline composite powder was 5.54wt% and the ball-milled time was 48 hours,ultrafine WC-10Co cemented carbide with excellent properties and homogeneous microstructure was obtained.
WC-10Co nanocrystalline composite powders prepared by spray pyrogenation-continuous reduction and carburization technology were consolidated by vacuum sintering plus hot isostatic pressing (HIP). Influences of carbon content on properties and microstructure of ultrafine WC-10Co cemented carbide were investigated. The results show that the relative density of the ultrafine WC-10Coated carbides can reach 99.72%, and the transverse rupture strength (TRS) was higher than 3 890 MPa, the average grain size was less than than 460 nm, when carbon content in nanocrystalline composite powder was 5.54 wt% and the ball-milled time was 48 hours, ultrafine WC-10Co cemented carbide with excellent properties and homogeneous microstructure was obtained.