Properties and applications of P/M of Copper alloys

2. INTRODUCTION
WIDE APPLICATION
SELF-LUBRICATING BEARING
INTERCONNECTED POROSITY
MIXING WITH OTHER ELEMENTS
BRASSES AND BRONZES
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3. YOU WILL KNOW
Production and
properties
Characteristics of
copper alloy
Copper powder
consolidation
techniques
Applications of copper
alloys
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5. Atomization
ATOMIZATION ANNILING REDUCTION
PRODUCTIONProduction
PARTICLE SIZE AND SHAPE
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6. ELECTROLYSIS
LOOSEPOWDERY
DEPOSIT
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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8. COPPER POWDER CONSOLIDATION TECHNIQUES
compaction
•Solid state sintering
Liquid phase sintering
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9. COMPACTION
Compacting pressure
compaction
objective
Effects of
high
pressure
Proper
pressure
for Cu
Prevent proper
sintering
Electric
conductivity
strength
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10. sintering
stage1
stage2
stage3
Solid state sintering
1-neck growth
2-powder particles
1-densification
2-recrystalization
1-spheroidal pores
2-densification
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11. Sintering
rate
Compact
properties
Sintering
rate
strength
conductivitydensification
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14. Pre-Mix Versus pre-Alloy
Bronze pm parts
Yield strength
Work hardening rate
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16. Powder
metallurgy
Porous
products
Self-
lubricating
bronze
filters
Wide range of strength and environment
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17. BRASS AND NICKEL-SILVER PM PARTS
Atomizing alloy melts
brass 95Cu-5Zn to 60Cu-
40Zn
Nickel-silver
parts
64Cu-18Ni-16/5Zn-1/5Pb
Pre-heating sintering Optimum properties
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19. COPPER ALLOY PM PARTS
Corrosion
resistance
ductility
Electrical
and
thermal
conductivity
Cost
reduction
Hold
tolerance
strength
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20. Bronze
cam
•projectors
•resistant
Gear and
ratchet
•Dial telephones
•Reduce cost
Pantograph
shoes
•railroads
•High
strengthlow cost
Bronze
pm parts
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21. BRASS PM PARTS
1-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 mechanism
Leaded brass
Prevent detonation of the round
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