PVD 涂层高速钢微钻用于铝合金钻削性能研究
Journal of Nanjing University of Science and Technology(2016)
Abstract
为了提高高速钢微细钻头的钻削质量,研究了物理气相沉积( PVD)涂层高速钢微细钻头在高速干式环境下钻削铝合金时的钻削性能。应用PVD离子镀技术在直径0.2 mm的高速钢微细钻头上制备TiAlSiN、DLC、TiN和AlTiN 4种涂层,并通过同时沉积涂层的高速钢圆盘间接测量得到涂层的显微硬度、厚度和平均摩擦系数。以6061铝合金为被加工零件对涂层的实际加工性能进行了试验测试,得到了已钻取孔的表面形貌、直径和角磨损量。通过VHM-I04显微硬度计在0.49 N下测定,DLC涂层微钻的显微硬度为2800,摩擦系数为0.05,钻削效果在所有涂层微钻和未涂层微钻中最好。因与高速钢基体结合差,导致TiAlSiN涂层容易脱落、微钻磨损快,故TiAlSiN涂层不适合沉积在微钻表面。
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Key words
physical vapor deposition coating,high speed steel,micro drill,aluminum alloy,micro hardness,thickness,average friction coefficient,surface morphology,diameter,corner wear
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