Wet Milling: To have the WC&Co mixture even distribution and combination and ensure uniform grain size, Tungsten carbide rod powder mixed with cobalt powder and other additive milling in alcohol.
Blending pressing binder and drying: The mostly used pressing binder in the manufacture of cemented carbide rod, such as rubber, paraffin wax, PEG, SBS and so on. The WC&Co mixture material will dried in the process before press.
Pressing to rods: There are two way to press with different advantages. Extrusion way, best way to press long length rods from 300-330mm. Automatic press, best way to press short rods (45-100mm length).
Drying shaped rods: Firstly, it should be naturally dried. Second, drying in oven.
Sintering: Sintered under 6Mpa pressuer and 1400℃+ .
Anlysis: Inspection with hardness, TRS, Metallographic, Coercive force, density etc.