Powder Metallurgy

Jun 21st, 2015
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Angelo State University
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• The name given to the process by which fine powdered materials are blended, pressed into a desired shape (compacted), and then heated (sintered) in a controlled atmosphere to bond the contacting surfaces of the particles and establish the desired properties.

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Chapter 1Introduction1.1Powder Metallurgy The name given to the process by which fine powdered materials are blended, pressed into a desired shape (compacted), and then heated (sintered) in a controlled atmosphere to bond the contacting surfaces of the particles and establish the desired properties.It is commonly designated as P/MIt readily lends itself to the mass production of small, intricate parts of high precision, often eliminating the need for additional machining or finishing.Has a little material waste; unusual materials or mixtures can be utilized; and controlled degrees of porosity or permeability can be produce.Major areas of application tend to be those for which the P/M process has strong economical advantage or where the desired properties and characteristics would be difficult to obtain by any other method.1.2Background/history:Early 3000 B.C. a crude form of powder metallurgy appears to have existed In EgyptMid- or Late 19th Century the mass production of P/M products beginEarly 20th Century powder metallurgy was used to produce copper coins and Medallions, platinum ingots, and tungsten wires, the primary material for light Bulb filaments1920s Tungsten carbide cutting-tool tips and nonferrous bushings were produced. Other early products were self-lubricating bearings and metallic filters.After World War II a period of rapid technological development occurr which are based primarily on automotive applications, and iron

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