Research and development of polycrystalline diamond cutter used on road milling machine

Polycrystalline diamond cutter, which is used on road milling machine, is prepared by using connecting technology of nano-bond gradient transition layer on cubic press.Its wear resistance, impact resistance and thermal resistance are tested by using wheel-dress and hammer-drop.Resultsshow that the wear ratio of prepared cutter is more than 250 000, and that its impact toughness is 1220 J.It is also found that the cutter performs good thermal stability at 750℃for 1.5h.When milling asphalt concrete pavement, service life of this cutter is 6times as long as that of carbide alloy cutter.