Cn. Degoix et al., EFFECT OF LUBRICATION MODE AND COMPACTION TEMPERATURE ON THE PROPERTIES OF FE-NI-CU-MO-C, International journal of powder metallurgy, 34(2), 1998, pp. 29-33
Improved sintered properties are sought in new powder metallurgy parts
applications and this need translates into increased green density. S
everal techniques have been evaluated for increased green density and,
hence, higher sintered properties, including warm compaction and the
elimination of internal lubricants. However, no study has examined the
se techniques using a non-bias test matrix. This study included two co
mpaction temperatures and three lubrication techniques applied to a Fe
-2Ni-2Cu-0.85Mo-0.8C alloy using a PTFE lubricant. All test conditions
were evaluated in terms of green and sintered properties, including e
jection force, green and sintered density, tensile strength, and impac
t toughness. In the context of the experimental matrix evaluated, dry
lubricant admixing and cold compaction promoted the best combination o
f green and sintered properties compared to powder coating, die wall l
ubrication, and warm compaction.