Water
atomized powder (WA powder)and Gas atomized powder(GA powder) are main two
types powder for metal injection mold process.(www.zcmim.com) The performance characteristics
of them can be analyzed as following:
Characteristics in metal
injection molding sintering process
Ø High green density
with GA powder due to spherical shape.
Ø Lower shrinkage during
sintering than WA product
Ø Better tolerance
control possible with GA powders
Mechanical properties of gas
atomized powders and water atomized powders
The
use of gas atomized powder gives 10~20% improvement in tensile strength, 10~20%
improvement in elongation and 4~7% improvement in hardness compared to the
equivalent water atomized product.
