METHOD OF MAKING A SUBMICRON CEMENTED CARBIDE POWDER MIXTURE WITH LOW COMPACTING PRESSURE

摘要

The invention crushing, pressing and sintering powders such as low suitable for the preparation of ultrafine tungsten carbide by metallurgical relate to a method for producing a hard metal which is pressed by the pressing force. The method of 90% or less of PEG and high molecular weight (C12 ~ C20 or less) saturated or unsaturated fatty acids, or Al, Ba, Ca, Co, Cr, Mg, N, Na, V, Zn, preferably Co, Cr, N, V, or 10 to 75% by weight of a salt containing one or more of the elements of Zn, preferably involves the use of a pressing agent of 1-3% by weight comprising a mixture of 25-50% by weight . Preferably, the particle size of the cemented carbide powder is ultra fine. In a preferred embodiment, the method comprises using a ball mill or other suitable dry-grinding method with grinding of cemented carbide formed body before the wet milling step of about 2 to 45 hour pre-milling the dry powder of the WC hard component over. Invention also relates to the powder obtained by the method.