Application Research On Physical Vapor Deposition TiAlN/TiN Nano-multilayer Films

As a superhard coating, TiAlN/TiN nano-multilayer coating will play an important role in machining. TiAlN/TiN nano-multilayer films were prepared by Physical vapor deposition of alternating arc source technology. Analysis on TiAIN nano-multilayers organizational structure, mechanical properties, wear resistance and cutting process, cutting stress, cutting force and cutting heat by hardness tester, milling instrument, microscope, contrast cutting test, finite element analysis method, get the following conclusion:(1) Preparation of TiAlN/TiN nano-multilayer film. Based on the modulation period and modulation ratio change, TiAIN and TiN were alternately deposited, the thickness of each layer are in nanometer scale, TiAlN/TiN nano-multilayer coating and substrate with good strength, reach the industrial application of the standard HF-1 class. The hardness is 3400HV. The thickness is 2.5μm, and thickness uniform distribution.(2) In the same cutting conditions, the wear resistance of TiAlN/TiN nano-multilayer film is better than the single gradient TiAIN film, wear resistance is increased about one times; cutting temperature, tool stress reduction, improve tool life, improve the surface quality of the machined workpiece, cutting force decreases at the same time to reduce one times machine tool energy consumption.(3) Based on the findings of 45 steel cutting process of finite element analysis software DEFORM, compared with TiN coating, TiAlN/TiN multilayer structure reduces cutting temperature, cutting stress, cutting force and high wear resistance. Through the analysis of cutting 45steel,H13 steel, Incone1718and Ti6A14V four kinds of materials, tools in simulation the cutting process is shown overall trend of temperature, stress, cutting force and wear the is the same in the cutting process.