Method for preparing non-bond fine-particle WC-based cemented carbide

The invention discloses a method for preparing non-bond fine-particle WC-based cemented carbide. The method includes the following steps that (1) according to the mass fraction, 500 parts of WC mixed powder, 0.15-0.50 part of carbon black and 500-1500 parts of alloy pellets are put into a test machine to be dry-ground for 4-10h, the rotating speed is 30-72r/min, the mixed powder is taken out after halting lasts for 4-6h, and non-bond powder is prepared by means of vacuum drying and sieving; (2) the non-bond powder is sintered through a spark plasma sintering method, the hardness HRA of the prepared product is larger than or equal to 95.4, the density is larger than or equal to 15.30g/cm , the relative density is larger than or equal to 97.4%, and no holes and inclusions are left. Workpieces prepared through the method have excellent performance, holes, inclusions and eta phases are avoided, the HRA is larger than or equal to 95.4, the density is larger than or equal to 15.30g/cm (WC theoretical density is 15.