Transcription of POWDER METALLURGY - 國立中興大學
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POWDER METALLURGY - 國立中興大學
2002 John Wiley & Sons, Inc. M. P. Groover, Fundamentals of modern Manufacturing 2/e POWDER METALLURGY The Characterization of Engineering Powders Production of Metallic Powders Conventional Pressing and Sintering Alternative Pressing and Sintering Techniques Materials and Products for PM Design Considerations in POWDER METALLURGY 2002 John Wiley & Sons, Inc. M. P. Groover, Fundamentals of modern Manufacturing 2/e POWDER METALLURGY (PM)Metal processing technology in which parts areproduced from metallic powders In the usual PM production sequence, the powdersare compressed (pressed) into the desired shape andthen heated (sintered) to bond the particles into ahard, rigid mass Pressingis accomplished in a press-type machineusingpunch-and-dietooling designed specificallyfor the part to be manufactured Sinteringis performed at a temperature below themelting point of the metal 2002 John Wiley & Sons, Inc. M. P. Groover, Fundamentals of modern Manufacturing 2/e Why POWDER METALLURGY is Important PM parts can be mass produced tonet shapeornearnet shape, eliminating or reducing the need forsubsequent machining PM process wastes very little material-about 97% ofthe starting powders are converted to product PM parts can be made with a specified level ofporosity, to produce porous metal parts Examples: filters, oil-impregnated bearings andgears 2002 John Wiley & Sons, Inc.
©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e” Why Powder Metallurgy is Important •PM parts can be mass produced to net shape or near net shape, eliminating or reducing the need for subsequent machining
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