HM

1. Preparation and mixing of the powder
   – Mixing of Wolframcarbid (WC), Cobalt, Nickel or Iron and other Carbides.
   – Homogenising to destroy the agglomerates and increase the sinter activity of the powder.
   – Spray drying to get a flowing granulate with a homogenous density

2. Pressing / Forming
   Four possibilities of pressing (starting material: granulate):
   – Direct pressing (ca. 2 t/cm²).
   – Iso-static pressing
   – Extrusion
   Metal injection moulding (MIM)
   – Forming (starting material: pressed green body): Machining with a pcd- or diamant coated tool (turning, milling, drilling) or grinding with diamant

3. Sintering
   – Between 1400 – 1600° C depending on the grade.
   – Change of carbon balance.
   – Sintered carbide is non-porous.
   – Shrinkage of the carbide part between 19 – 30%.

4. Finishing
   – Grinding, wire-edm, honing, polishing.
   – Inspection
   – Coating

Movie

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