Extrusion molding is suitable for the production of long and complex cross-section products, such as tubes, rods and strips of cemented carbide. Plasticizers cause critical hazards to the extrusion process, and their characteristics are that they are added in large quantities and require excellent bonding. Plasticizers are generally composed of organic solvents, organic chemical binders and surfactants. Blending plasticizers evenly into the mixture is a key step in extrusion quality management. In the extrusion process, in order to have sufficient exhaust pipe, it is best to carry out in a press equipped with ultrafiltration device. The working pressure of extrusion lies in the properties of plasticized powder. Poor extrusion usually leads to shortcomings such as cracks and poor relative density. The quality of the extruded billet should be paid very high attention to.

The sintering of cemented carbide is high-efficiency liquid phase sintering, which is carried out under the standard that the binder phase is a high-efficiency liquid phase. The compact is heated to 1350℃~1600℃ in a vacuum sintering furnace. The linear shrinkage rate of the compact during sintering is about 18%, and the volume is shrunk around 50%. The precise value of the shrunk amount lies in the powdery particle size distribution and the composition of the aluminum alloy.