Metal cutting is a highly dynamic process, where the loading condition of tool coating is very complex. Excellent static mechanical properties of tool coatings are not enough to meet the dynamic cutting environment, including impact load, cyclic load and so on. The high-frequency and high-temperature cycle impact test device based on ultrasonic vibration was developed in this study. The device performed the high-frequency impact on coating samples through high-frequency reciprocating motion of ultrasonic horn, whose impact frequency could reach 20 kHz. In addition, a high-temperature module was added to perform high-frequency fatigue test at high temperature. Cutting experiments of titanium alloy and impact tests with different temperatures and loads were carried out for the bilayer TiSiN/TiAlN coating. The results of cutting experiments and impact tests were compared and analyzed. The relationship between impact test and cutting experiment was proposed to characterize and evaluate the cutting performance of coated cutting tool by using the high-temperature impact tests.

中文翻译：

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切削刀具涂层的高温抗冲击性能对其切削性能的影响


金属切削是一个高度动态的过程，刀具涂层的载荷条件非常复杂。刀具涂层优异的静态机械性能不足以满足动态切削环境，包括冲击载荷、循环载荷等。本研究研制了基于超声波振动的高频高温循环冲击试验装置。该装置通过超声波变幅杆的高频往复运动对涂层样品进行高频冲击，冲击频率可达20 kHz。另外，还增加了高温模块，可以进行高温下的高频疲劳测试。对双层TiSiN/TiAlN涂层进行了钛合金切削实验以及不同温度和载荷下的冲击试验。对切​​削实验和冲击实验的结果进行了比较和分析。提出了冲击试验与切削试验之间的关系，利用高温冲击试验来表征和评价涂层刀具的切削性能。