Factors determining flowability of segregation-free iron powder with lubricant containing wax

摘要

Adhesive forces dominating the flowability of the segregation-free iron based powder consist of liquidbridge force, electrostatic force and van der Waals force. They were calculated and the absorptionisotherm of water vapor on the segregation-free iron based powder was measured. The resultindicated that the van der Waals force between binder on iron powder and lubricant powder and thatbetween lubricant powders are main forces that determine the flowability of segregation-free ironbased powder in the relative humidity less than 91%.