Fabrication of WC Matrix Composite Tool Material and Its Cutting Performance in Machining Titanium Alloys

Titanium alloys are used widely for their high strength-to-weight ratio and good corrosion resistance characteristics. However, these alloys have been classified as 'difficult-to-machine' materials. In order to improve the cutting efficiency in machining the titanium alloys, a new WC matrix composite tool material was prepared by hot pressing technology in this research. The cutting performance of the newly developed tool material in machining titanium alloy Ti6Al4V was investigated. The factors which influence the wear modes of the tool were investigated and the wear mechanisms were analyzed. Results show that the high temperature and mechanical friction are the main factors in the wear process. The wear mechanisms of the tool in machining titanium alloys are adhesion wear and abrasive wear.