Patent ID: 8425652
Filing Date: 2013-04-23
Classification: B22F,C22C

Abstract:
1. A method of making a ready to press cemented carbide powder suitable for the production of submicron cemented carbide comprising the steps of wet milling, pressing and sintering powders comprising WC, binder metal and a pressing agent, wherein the pressing agent comprises from about 1 to about 3 wt-% of total weight of the powder, and wherein the pressing agent comprises less than about 90 wt-% PEG and from about 10 to about 75 wt-% of at least one compound selected from the group consisting of high molecular weight (C12-<C20) saturated fatty acids, high molecular weight (C12-<C20) unsaturated fatty acids, and salts thereof containing at least one element of Al, Ba, Ca, Co, Cr, Mg, N, Na, V, or Zn.