TiVN涂层的耐磨性与切削性能的关联研究

通过多弧离子镀沉积技术制备了TiN和TiVN涂层，对比了两种涂层在不同工况下的摩擦磨损性能和切削性能，并指出影响刀具涂层服役性能的主要因素。结果表明，V元素掺杂有效提高了TiN涂层的硬度和结合力、减小了TiN涂层的摩擦因数和低温下的磨损率，但V容易氧化的特性导致500 ℃及以上温度TiVN涂层产生较高的磨损率。切削测试表明，在麻花钻的主切削刃和横刃区域两种涂层发生明显的剥落，而在后刀面涂层未发生明显剥落，TiVN涂层较高的膜基结合强度和耐磨性能使得它对刀具的防护效果更佳；刀具涂层的服役性能与其耐磨性能和膜基结合强度有关，刀具的主切削刃和横刃区域对涂层的耐磨性能和膜基结合强度有着苛刻的要求，且切削刃尖端温度较高，对涂层的高温耐磨性能和膜基结合强度要求也高。

Association between Wear Resistance of TiVN Coatings and Their Cutting Performance

TiN and TiVN coatings were prepared by multi-arc ion deposition technology, and the tribological and cutting performance of the coatings at different conditions were compared, then the main factors affecting the service performance of tool coatings were pointed out. The experimental results show that V doping may effectively improve the hardness and bonding forces of TiN coatings, and reduce the friction factor and wear rate of TiN coatings at low temperature. However, the TiVN coatings have a higher wear rate when the temperature is higher than 500 ℃, and this is ascribed to the easy oxidation of V. The cutting tests show that TiN and TiVN coatings flake easily on the main cutting edges and transverse edge areas of the twist drills， whilst, there is no significant peeling of the coatings on flank surfaces of the cutting tools. It is supposed that the excellent cutting performance of TiVN coatings is ascribed to the high bonding strength and wear resistance. The service performance of the tool coatings is related to the wear resistance and bonding strength. In addition, the main cutting edges and chisel edge areas of the tools have strict requirements on the wear resistance and bonding strength. Meanwhile, the temperature of the cutting edge tips is high, which shows a high requirement for  high temperature wear resistances and bonding strength of the coatings.