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The submicron whose consolidation pressure is low production manner and the cemented carbide powder of the cemented carbide powder blend

机译:固结压力低的亚微米粉生产方式与硬质合金粉末混合物中的硬质合金粉末

摘要

The present invention relates to a method of making a ready to press cemented carbide powder with low compaction pressure suitable for the production of submicron cemented carbide by means of powder metallurgical techniques milling and pressing and sintering. The method comprises using 1 - 3 wt-% pressing agent of the following composition and 90 wt-% PEG and 10 - 75 wt-% of blends of high molecular weight (C12 - C20) saturated or unsaturated fatty acids, or salts thereof containing at least one element of Al, Ba, Ca, Co, Cr, Mg, N and Na, V, Zn. Preferably the grain size of the cemented carbide powder is submicron. In a preferred embodiment the method includes a DRY pre-milling of the hard constituents mainly WC-powder for about 2-45 hours in ball mills with cemented carbide milling bodies or using other suitable DRY milling techniques prior to a wet milling step. The invention also relates to the powder obtained by the method.
机译:本发明涉及一种制备方法,该方法用于通过压制,压制和烧结的粉末冶金技术制备适用于生产亚微米硬质合金的,具有低压实压力的预压硬质合金粉末。该方法包括使用以下组成的1-3 wt%的促凝剂和<90 wt%PEG和10-75 wt%的高分子量(C12-

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