ALTERNATIVE TECHNIQUE FOR DETERMINING THE COMPESSIBILITY OF POWDER SYSTEMS

Abstract

GOST 25280–90 (CMEA 6741–89, ISO 3927–77) “Metal powders. Method for determination of compressibility” is considered. Given the shortcomings revealed, an alternative technique for determining the density giving allowance for the maximum repressing pressure of briquettes during deflashing from cylindrical dies. The updated comparative procedure for determining the density includes several stages: (i) compacting lubricant-containing mixtures in greased and ungreased dies and (ii) recompacting greased briquettes in a die with bigger diameter. The proposed technique can be used for commercial compacting of powders.