Abstract
In order to achieve the higher density in a die-lubrication compacting process, an experimental investigation was conducted regarding the influence of zinc stearate lubricant added in iron powder on the green density, the friction between powder and die wall, and the friction between powders.
The lubrication of some 0.05 mass% was most suitable for the powder flowability and the axially uniform density. The die lubrication is important to reduce the die-powder friction, however, it can not improve the green density. The effect is similar as in case of graphite-added powder. The lubricant reduction is most promising when compacting pressures is higher than 700MPa in the method.
