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 w
• Metal powders => Main constituent of a P/M product; final properties of the finished P/M part depends on size, shape, and surface area of powder particles • Single powder production method is not sufficient for all applications Powder production methods: 1. Mechanical methods, 2. Physical methods, 3. Chemical methods 1.
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