Development of a Lubricant System for Improved Performance of Premixes

摘要

Particulate lubricants are commonly admixed in powder metallurgy (PM) premixes to provide lubricity during the compaction process by decreasing interparticle friction, as well as decreasing the friction between the particles and the die. Friction reduction between the final compact and the die allows for easier part ejection, which leads to improved life of the tooling. In this study, four total admixed lubricants are tested to determine their effect on the properties of the premixed powder, green compacts, and final sintered parts. Two of the lubricants, EBS wax and Kenolube, are commonly used in the PM industry, while two other lubricants are experimental lubricants. All four lubricants are compared over a range of compaction pressures and at two different die temperatures.