This is done to obtain certain properties available to different types of metals. Some metals are added to increase toughness, while others act as lubricants or binders. The third step is to conpact the powder into the shape desired. This is often done using removable dies that are compacted using a mechanical or hydraulic press. The compacting stage is very critical to obtaining high product density that is uniform throughout the part.
Powder metal can also be injection molded instead of compacted.
The final step is to sinter the part. Sintering is heating the powder metal part so that it is hot enough to permit the particles to bond, but below the melting temperature. This is always done in a protective atmosphere. Sintering increases strength, ductility, toughness, and electrical and thermal conductivity. Powder metallurgy eliminates or reduces machining and has high production rates.