摘要为解决高温合金薄壁件加工时颤振大和磨损大的问题，研究了不同成分体系涂层对铣削刀具的影响。采用电弧离子镀的方法在硬质合金刀具表面沉积了AlTiN/TiAlN、AlCrN/TiAlN 和TiSiN/TiAlN 3 种双层涂层。采用扫描电子显微镜、纳米压痕仪与微米划痕仪表征了3 种涂层的表面形貌与力学性能，在高性能铣床进行了涂层刀具的铣削试验，采集了刀具后刀面磨损照片与对应切削力，分析了不同涂层在铣削时的性能表现。研究表明，TiSiN/TiAlN涂层具有最高的硬度与耐磨因子，在铣削24 m 后，后刀面磨损最小，但涂层表层易与高温合金发生黏结；AlCrN/TiAlN 涂层硬度与耐磨因子稍低，铣削24 m 后，刀具接近失效，但与高温合金黏结并不严重；AlTiN/ TiAlN 涂层硬度与耐磨因子最小，铣削后磨损最严重，铣削12 m 时刀具已经失效，但涂层与高温合金黏结最为轻微。因此，使用硬度与耐磨因子较大的涂层能够有效减小刀具铣削高温合金时的磨损，进而提高刀具寿命。
To solve the problem of high vibration and severe wear when milling superalloy thin-walled workpiece, the influence of different coating systems on milling tools was studied. AlTiN/TiAlN, AlCrN/TiAlN and TiSiN/TiAlN double-layer coatings were deposited on the carbide tools by arc ion plating. The morphology and mechanical properties of three coatings were characterized by scanning electron microscope, nano indentation instrument and micron scratch instrument. Milling tests of coated tools were carried out on a high-performance milling machine. The tool wear condition and cutting forces were collected, and the performance of different coatings during milling was analyzed. The results show that TiSiN/TiAlN coating has the highest hardness and wear resistance factor, and the wear of flank surface is the smallest after 24 m of milling, but the coating is easy to bond with the superalloy. Compared with TiSiN/TiAlN, the hardness and wear resistance factor of AlCrN/TiAlN coating are smaller, and the tool is close to failure after 24 m of milling, but the bond with superalloy is not so serious; AlTiN/TiAlN coating has the smallest hardness and wear resistance factor, and the most severe wear condition. The tool has failed after milling of 12 m, but the bond between the coating and the superalloy is the slightest. Therefore, coating with higher hardness and wear resistance factor can effectively reduce the wear of the tool when milling superalloys and prolong tool life.
2023, 
