Transcription of Powder metallurgy – basics & applications
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Powder metallurgy – basics & applications
R. Ganesh Narayanan, IITGP owder metallurgy basics & applicationsPowder metallurgy science of producing metal powders and making finished /semifinished objects from mixed or alloyed powders with or without the addition of nonmetallic constituentsSteps in Powder metallurgy : Powder production, Compaction, Sintering, & Secondary operationsPowder production:Raw materials => Powder ; Powders can be pure elements, pre%alloyed powdersMethods for making powders Atomization: Produces powders of both ferrous and non%ferrous powders like stainless steel, superalloys, Ti alloy powders; Reduction of compounds: Production of iron, Cu, tungsten, molybdenum; Electrolysis: for making Cu, iron, silver powdersPowders along with additives are mixed using mixersLubricants are added prior to mixing to facilitate easy ejection of compact and to minimize wear of tools; Waxes, metallic stearates, graphite characterization size, flow, density, compressibility testsR.
R. Ganesh Narayanan, IITG Mechanism of milling : Changes in the morphology of powder particles during milling results in the following events.
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