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本文在干式切削条件下,选用钴基硬质合金无涂层数控刀具和钴基硬质合金基体TiAlSiN与TiAlN/Ta涂层数控刀具,分别切削淬火态45钢(52HRC);车削时,采用SW-1车刀空间受力分析仪测量刀具在车削状态下的三向力;结合对被加工件的表面粗糙度测定,探讨TiAlSiN、TiAlN/Ta涂层刀具在相同条件下的三向力、摩擦力和摩擦系数与无涂层钴基硬质合金刀具的差异。结果表明,在车削高硬度材料时,涂层及其成分对车刀三向力和摩擦系数均有较大影响,TiAlN体系中加入稀土元素Ta形成的TiAlN/Ta多层涂层刀具的三向力、摩擦系数明显小于TiAlSiN涂层刀具,而且被加工件的表面粗糙度更小。
In this paper, dry cutting conditions, the choice of cobalt-based non-coated carbide cutting tools and cobalt-based cemented carbide substrate TiAlSiN and TiAlN / Ta coated CNC cutting tools, respectively, cutting quenched 45 steel (52HRC); turning, the use of SW-1 tool space force analyzer measuring tools in the turning state of the three-dimensional force; combined with the workpiece surface roughness measurement to explore TiAlSiN, TiAlN / Ta coated tool under the same conditions of the three-force, Differences of friction and friction coefficient with uncoated cobalt-based cemented carbide tools. The results show that the coating and its composition have a significant influence on the three-way force and the friction coefficient of turning tool when turning high hardness material. The TiAlN / Ta multilayer coating tool with Ti Force, friction coefficient is significantly less than TiAlSiN coating tool, and the workpiece surface roughness is smaller.