The Second Stepin Powder Metallurgy process is Called Powder Blending A single powder may not fulfil all the requisite properties and hence, powders of different materials with wide range of mechanical properties are blended to form a final part. Blending is carried out for several purposes as follows. 1. Blending imparts uniformity in the shapes of the powder particles,
2. Blending facilitates mixing of different powder particles to impart wide ranging physical and mechanical properties, 3. Lubricants can be added during the blending process to improve the flow characteristics of the powder particles reducing friction between particles and dies,
4. Binders can be added to the mixture of the powder particles to enhance the green strength during the powder compaction process.