路面铣刨机用聚晶金刚石截齿头的研制

采用纳米结合剂梯度过渡层连接技术，在六面顶压机上合成路面铣刨机用聚晶金刚石截齿头。采用砂轮修整和落锤冲击的方法进行耐磨性、抗冲击性和耐热性等3方面的测试。结果表明:所合成的聚晶金刚石截齿头磨耗比大于25万，抗冲击韧性为1220 J；在750℃保温1.5h的条件下，具有很好的热稳定性；制成的路面铣刨机截齿，在铣刨沥青混凝土路面时，使用寿命是硬质合金截齿的6倍。 

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.