Powder metallurgy Introduce

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What is PM:

Powder metallurgy, or PM or sintered metal parts, is a process for forming metal parts by heating compacted metal powders to just below their melting points. Although the process has existed for more than 100 years, over the past quarter century it has become widely recognized as a superior way of producing high-quality parts for a variety of important applications. This success is due to the advantages the process offers over other metal forming technologies such as forging and metal casting, advantages in material utilization, shape complexity, near-net-shape dimensional control, among others. These, in turn, yield benefits in lower costs and greater versatility .


Why PM:Advantages of the PM Process

Eliminates or minimizes machining by producing parts at, or close to, final dimensions

Eliminates of minimizes scrap losses by typically using more than 97% of the starting raw material in the finished part
Permits a wide variety of alloy systems :Copper Steels;Phosphorus Steels ;Nickel Steels; Molybdenum Steels;Copper-nickel;molybdenum-nickel;and copper-nickel-molybdenum Steels;Stainless Steels.
Produces good surface finishes
Provides materials which may be heat treated for increased strength or increased wear resistance
Provides controlled porosity for self lubrication or filtration
Facilitates manufacture of complex or unique shapes which would be impractical or impossible with other metalworking processes
Is suited to moderate- to high-volume component production requirements
Offers long-term performance reliability in critical applications
Is cost effective,lowest energy requirement per Kg of finished part
High speed production:Production runs range in number from a few hundred to thousands of parts per hour.Some part can be produced highly automatically by injection machine.

PM Markets :

PM components are used in a variety of markets, with the automotive industry being the predominant one, consuming approximately 70% of the ferrous products the industry produces annually. Other important markets include recreation, hand tools, and hobby products; household appliances; industrial motors and controls; hardware; and business machines. And, as designers increasingly learn about the superior performance, cost savings, and unmatched tolerances the PM process can offer, the trend indicates that PM components are continuing to expand into previously untapped markets.

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