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Impregnating Powdered Metal Parts
The full range of design and applications for P/M components can be limited by the particulate nature of powdered metal. This structure causes problems during machining and surface finishing and may lead to sub-surface corrosion and oxidation. In addition, inherent structural porosity prevents the use of P/M parts in pressure applications.
IMPCO's Impregnation Technology eliminates these problems by filling the openings and voids between the P/M particles, providing greater flexibility and new opportunities for the design and manufacture of P/M parts. This cost-saving technology is enabling design engineers and production managers to enlarge the range of applications for P/M components.
"Machining my P/M parts wears out my tooling and the machined finish is unsatisfactory. Greater machining efficiency would save me a bundle in tooling and production costs."
P/M parts are generally made to "finished size and shape". Secondary machine operations, such as drilling, tapping or cutting are only marginally successful because voids between the particles cause tool chatter, reducing tool life and finish quality. IMPCO resins serve as a combination lubricant, stabilizer and support for individual P/M granules. Machining is far more efficient. Tool chatter is eliminated and the machined finish is greatly improved. IMPCO's Impregnation Technology greatly extends tool life (over 100 times) and allows design of P/M parts for use in areas where secondary machining is necessary.
"My application calls for pressure retention. How can I get leak-proof P/M parts that meet my specifications?"
Part leakage under pressure is caused by porosity, interconnected openings between the individual powered metal particles, stretching from wall to wall of the components. IMPCO's Impregnation Technology fills these voids with IMPCO resins that permanently seal porous openings. Your parts are virtually leak-proof and are capable of withstanding high pressures.
"Finish operations are tough on my P/M parts. The plating is uneven and I keep getting bleedout that damages the surface finish."
These plating problems are caused by the voids between the metal granules of the part that allow plating solutions to permeate the component causing uneven and poor plating. Bleedout damage is caused by solutions that leech out of these voids in the part after plating. IMPCO's Impregnation Technology and impregnating resins fill the voids between the particles providing a barrier base for plating and eliminate subsequent bleedout, improving the quality and finish of your plated P/M parts.
"My parts need to be heated in order to be painted or plated. These finishes don't adhere properly to the part surface."
Painted or vulcanized finishes for P/M parts can encounter problems such as corrosion, moisture, resin residue on the part surface, or contaminants behind the coating which can damage the finish or prevent good adhesion. IMPCO Impregnation Technology solves these problems and allows excellent component finishing. Using IMPCO resins, your parts may be heated up to 350°F (175°C) during painting or vulcanization without any resin bleedout or surface resin. Thus allowing you to fully utilize the latest technology in surface finishing