The Friction Index and Pressing Characteristics of Spherical Stainless Steel Powder and Oxidized Copper Powder

摘要

A procedure is described for accumulating data on the friction index and compression ratio of a copper powder at different stages of oxi-dation and screened fractions of a stainless steel powder. The dimensionless and nameless powder property, friction index divided by the compression ratio, under certain conditions, was constant for a regular series of size fractions of stainless steel powder. Calculations were made of the coefficient of compression and the limiting value of the degree of volume change in the manner of Kawakawa.