共沉淀回收硬质合金的组织结构和性能

以共沉淀回收废硬质合金的Ｗ－Ｃｏ复合物为原料制备的再生ＷＣ－１０Ｃｏ硬质合金具有ＷＣ平均晶粒细、矫顽磁力和硬度高的优点，但较多的ＷＣ晶粒缺陷、较高的ＷＣ晶粒邻接度Ｃｗｃ－ｗｃ和不连续长大的粗晶ＷＣ的存在降低了其强韧性。用共沉淀回收料制备两相ＷＣ－Ｃｏ合金，须实施较生产普通ＷＣ－Ｃｏ合金更为严格的碳含量控制。

Microstructure and Property of the Regenerated Hard Metal Made from W-Co Composite Recycled by Co-Precipitation

The regenerated hard metal made from W-Co composite recycled by Co-precipitation has the advantages of fine WC grain sire, high coercive force and high hardness. However, more WC grain defects, higher WC grain contiguity Cwc-we and discontinuously grown WC grains can reduce its strength and toughness.The more exactly controling carbon content of regenerated hard metal than that of normal WC-Co alloy isnecessary to make two-phase WC+y alloy with W-Co composite recycled by Co-precipitation.