Nanostructured novel cemented hard alloy obtained by mechanical alloying and hot-pressing sintering and its applications

A novel cemented carbides (W0.8Al0.2)C0.7–Co with different cobalt contents were prepared by mechanical alloying and hot-pressing technique. Hot-pressing technique as a common technique was performed to fabricate the bulk bodies of the hard alloys. The novel cemented carbides have superior mechanical properties compared with WC–Co. The density, operate cost of the novel material were much lower than WC–Co system. The novel materials were easy to process nanoscale sintering and get the rounded particles in the bulk materials. The most interesting and important phenomenon is there is almost no η-phase in the (W0.8Al0.2)C0.7–Co cemented carbides system although the carbon deficient get the astonished 30% value.