P/M Process

Powder metallurgy - frequently referred to as P/M - is a unique and highly developed method of manufacturing ferrous and non-ferrous components.

Both simple and complex parts can be efficiently and cost-effectively manufactured through the P/M process, which typically produces components of exceptional quality with very little waste.

SMPM takes the inherent values of powder metallurgy manufacturing to an even higher level with an unremitting commitment to quality, innovation, and customer service. Powder metallurgy is a three-step process, outlined briefly below:

Step One: MIXING
The first step in the P/M process is mixing elemental or prealloyed metal powders with lubricants or alloy additions. SMPM applies its years of P/M production experience to create mixtures that will serve each customers precise needs for strength, durability, and accuracy.

Step Two: COMPACTING
After the metal powders and additives are mixed, controlled amounts are gravity-fed into precision dies and compacted under intense pressure. Typically, compacting techniques use rigid dies set into special mechanical or hydraulic presses.The resulting "green compact" has the size and shape of the finished part when ejected from the die and has sufficient strength for in-plant transport to a sintering furnace.

Step Three: SINTERING
The third step of the P/M process involves heating the green compact by placing it on a continuous conveyor belt which passes through a high-temperature, atmosphere-controlled furnace. The parts are heated to below the melting point of the base metal, held at the sintering temperature, and then cooled, transforming the compacted mechanical bonds between the powder particles into metallurgical bonds. P/M parts are generally ready for use after sintering, but the parts may be further treated to provide special properties.