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Ch7ME543

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CHAPTER 7FINISHING OPERATIONS
Coining (REPRESSING):increase in density – r.t.strength increase work hardening.dimensional/shape change.Sizing -impart dimensional accuracy to sintered part.Machining -Side holes, slots/grooves, no liquid coolantGrindingfor improved dimensional accuracy and surface finishCold/hot forging-<5% porositysuperior properties
Secondary and Finishing operations
Infiltration -pore free parts (iron based compacts with copper,lead infiltration wear applications)Oil impregnationlubrication, corrosion resistancePlatingfor wear resistance, improved appearance, and corrosionresistance.Heat treating
Design Considerations
Economics of Powder Metallurgy
Advantage and Disadvantages ofPowder Metallurgy
Advantage and Disadvantages ofPowder Metallurgy
TRENDS
SUMMARY

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Ch7ME543