Industrial use of the high-rate (impact) pressing of metallic powders

Features of the high-rate (impact) pressing of metal powders are discussed. It is shown that impact pressing compacts powders to a relative density which is 97% of the theoretical value after a single loading. The pressure which exists during high-rate pressing is usually higher than the static pressure for the same density of the pressed powder. The force which presses the products out of the die is 1.5-2.5 times lower than in static pressing. Preliminary pressing of the powder reduces friction losses and ensures a more uniform distribution of density over the height of the product. Recommendations are given on the load rate in high-rate pressing and on the use of this operation in relation to the shape of the product. An example is given to illustrate the use of high-rate pressing for making large-diameter gaskets from copper powder.