properties and applications of p/m of copper alloys
TRANSCRIPT
PROPERTIE
S AND
APPLICATIO
NS OF P/M
OF
COPPER ALL
OYS
R E Z A . RA S H I D I 2 0 1 2 @ G M A I L . C O M
INTRODUCTIONWIDE APPLICATION
SELF-LUBRICATING BEARING
INTERCONNECTED POROSITY
MIXING WITH OTHER ELEMENTS
BRASSES AND BRONZES
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R E Z A . RA S H I D I 2 0 1 2 @ G M A I L . C O M
YOU WILL KNOW
Production and properties
Characteristics of copper alloy
Copper powder consolidation techniques
Applications of copper alloys
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R E Z A . RA S H I D I 2 0 1 2 @ G M A I L . C O M
PRODUCTIO
N AND
PROPERTI
ES
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Atomization
ATOMIZATION ANNILING REDUCTIO
N
PRODUCTIONProductionPARTICLE SIZE AND SHAPE
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ELECTROLYSISLO
OSE
POW
DERY
DE
POSI
T
LOW COPPER ION CONCENTRATION
HIGH ACID CONCENTRATION
HIGH CATHODE CURRENT DENSITY
ELECTROLYSIS
PROPERTIES
ADDITION AGENT
COPPER SULFATE
CURRENT DENSITY
ELECTROLYTE
TEMPERATURE
WASHING
BREAKE UP CLUSTERS
ANNEALING
CLASSIFICATION
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PROPERTI
ES OF C
OPPER
POWDER
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COPPER POWDER CONSOLIDATION TECHNIQUES
compaction•Solid state sintering
Liquid phase sintering
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COMPACTION
Compacting pressure
compaction
objectiveEffects of high
pressure
Proper pressure
for Cu
Prevent proper
sinteringElectric
conductivity
strength
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sinte
ring stage1
stage2stage3
Solid state sintering
1-neck growth2-powder particles
1-densification2-recrystalization
1-spheroidal pores2-densification
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Sintering rate
Compact
properties
Sintering rate
strength
conductivity
densification
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R E Z A . RA S H I D I 2 0 1 2 @ G M A I L . C O M
LIQUID PH
ASE SINTERING
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CHARACTERISTICS OF
COPPER ALLO
YS OF P\M
MATERIALS
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Pre-Mix Versus pre-Alloy
Bronze p\m parts
Yield strength
Work hardening rate
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Tin bronze
p\m parts
Sintering temperat
ure
Growth Strengt
h Heating rate Growth
Sintering time strength
Dimensional
control
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Powder metallurgy
Porous products
Self-lubricating
bronze
filters
Wide range of strength and environment
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R E Z A . RA S H I D I 2 0 1 2 @ G M A I L . C O M
BRASS AND NICKEL-SILVER P\M PARTS
Atomizing alloy meltsbrass 95Cu-5Zn to 60Cu-
40Zn
Nickel-silver parts 64Cu-18Ni-16/5Zn-
1/5Pb
Pre-heating sintering Optimum properties
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R E Z A . RA S H I D I 2 0 1 2 @ G M A I L . C O M
APPLICATI
ONS
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R E Z A . RA S H I D I 2 0 1 2 @ G M A I L . C O M
COPPER ALLOY P\M PARTS
Corrosion resistanceductilityElectrical and thermal
conductivity
Cost
reductionHold
tolerance
strength
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Bronze cam
•projectors•resistant
Gear and
ratchet
•Dial telephones
•Reduce cost
Pantograph shoes
•railroads•High strength\
low cost
Bronze p\m
parts
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BRASS P\M PARTS1-latch bolt
2-cylinder
3-diverter valve body
4-fuse
Density and withstand stress
Dimensional control and range of density
Task and pressure tightness
For the rotor of clockwork delay mechanismLeaded brassPrevent detonation of the round
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