TiAlN涂层的制备及其高速铣削淬硬钢的切削性能研究

The preparation of TiAlN coatings and cutting performance of coated milling tools for high-speed machining hardened steel

利用电弧离子镀在硬质合金刀具上沉积TiAlN涂层,该涂层由TiN过渡层和TiAlN涂层组成。采用扫描电子显微镜(SEM)、纳米硬度计和球盘摩擦测试等方法对涂层的显微组织和力学性能进行分析表征。在干式切削条件下,通过高速铣削测试淬硬(Crl2MoV,62 HRC),对涂层的切削性能进行了研究。结果表明:沉积的TiAlN涂层硬度高达31GPa,能有效地提高硬质合金刀具的高速切削性能。并对相关磨损机制进行了讨论。

TiAlN coating were deposited on carbide end mills by arc ion plating （AIP） ,which consisted of a TiN adhesive layer and a TiAlN top layer. The microstructure and mechanical properties of the coating were investigated by scanning electron micros- copy （SEM） , nano-indentation and pin-on-disk test. The cutting performance of the coated end mills were conducted by high- speed dry milling hardened steel （Cr12MoV,62 HRC）. The results revealed that the as-deposited TiAlN coating with high hard- ness of around 31 GPa and have been proven to improve the cutting performance of cemented carbide tools in high-speed machi- ning significantly. The related mechanisms were discussed.