公开(公告)号：US6030912A

公开(公告)日：2000-02-29

申请号：US12576

申请日：1998-01-23

申请人： Tsutomu Yamamoto ,  Kazuhiro Tezuka

发明人： Tsutomu Yamamoto ,  Kazuhiro Tezuka

IPC分类号： C22C29/02 ,  C04B35/56 ,  C22C29/08

CPC分类号： C04B35/645 ,  C04B35/5626

摘要： A sintered hard material according to the invention comprises 0.02 to 0.10 wt % of one or more metals selected from the group consisting of Fe, Co and Ni, 0.3 to 3.0 wt % of one or more compounds selected from the group consisting of carbides, nitrides and carbonitrides of transition metals of the IVa, Va and VIa groups of the periodic table and a residue of tungsten carbide component having an average particle size of 0.5 .mu.m or less, the tungsten carbide component containing WC and W.sub.2 C in a proportion W.sub.2 C/(WC+W.sub.2 C) of between 0.01 and 0.15, the W.sub.2 C in the tungsten carbide component having a lattice constant reduced by 0.3 to 1.5 %.

摘要翻译： 根据本发明的烧结硬质材料包含0.02至0.10重量％的一种或多种选自Fe，Co和Ni的金属，0.3至3.0重量％的一种或多种选自碳化物，氮化物的化合物 和周期表的IVa，Va和VIa族的过渡金属的碳氮化物和平均粒径为0.5μm以下的碳化钨成分的残渣，WC / W2C的碳化钨成分的比例为W2C /（ WC + W2C）为0.01〜0.15的情况下，具有晶格常数的碳化钨成分中的W2C为0.3〜1.5％。