硬质合金刀具类金刚石涂层的摩擦磨损性能

Friction wear behavior of diamond-like carbon films on carbide cutting tool

以等离子体化学气相沉积技术在硬质合金刀具表面制备了类金刚石(DLC)涂层。研究了DLC涂层刀具和无涂层刀具的硬度,不同载荷、不同转速下两种刀具的摩擦磨损性能,以及在水润滑和油润滑条件下DLC涂层刀具的滑动摩擦行为。结果表明,DLC涂层刀具的平均硬度为2099.9HV,比无涂层刀具提高了48.3%;DLC涂层刀具的摩擦因数明显低于无涂层刀具,其磨损率随着载荷的增加而增大,随转速的增大而减小;油润滑比水润滑能更有效减缓摩擦作用。

Diamond-like carbon （DLC） films were prepared on the surface of carbide tool by plasma chemical vapor deposition. The hardness and friction wear properties under different loads and at different rotation speeds for the tools with and without DLC films, as well as the sliding friction behavior of the tools with DLC films under water and oil lubricating conditions were studied. The results showed that the average hardness of the tools with DLC films is 2 099.9 HV, an increase of 48.3% as compared with the untreated carbide tool. The friction factors of the tools with DLC films are remarkably lower than that of the tools without DLC films. The wear rate is increased with increasing load, but decreased with increasing speed. The friction effect under oil lubrication is decreased more efficiently than that under water lubrication.