Powder metallurgy is a process of making components from metallic powders. Initially, it was used to replace castings for metals which were difficult to melt because of high melting point. The development of technique made it possible to produce a product economically, and today it occupies an important place in the field of metallurgical process. The number of products made by powder metallurgy is increasing including tungsten filaments of lamps, contact points, self-lubricating bearings, and cemented carbides for cutting tools. The manufacturing of parts by powder metallurgy process involves the following steps: manufacturing of metal powders, blending and mixing of powders, compacting, sintering, and finishing operations.
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