A novel (W-Al)-C-Co composite cemented carbide prepared by mechanical alloying and hot-pressing sintering

摘要

Novel cemented carbides (W_(0.4)Al_(0.6))C_(0.5)-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 good mechanical properties compared with WC-Co. The density and operation cost of the novel material were much lower than the WC-Co system. It was easy to process submicroscale sintering with the novel materials and obtain the rounded particles in the bulk materials. There is almost no eta-phase in the (W_(0.4)Al_(0.6))C_(0.5)-Co cemented carbides system although the carbon deficient obtains the astonishing value of 50 percent.