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首页> 外文期刊>Measurement >Hard turning using HiPIMS-coated carbide tools: Wear behavior under dry and minimum quantity lubrication (MQL)
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Hard turning using HiPIMS-coated carbide tools: Wear behavior under dry and minimum quantity lubrication (MQL)

机译：使用HiPIMS涂层硬质合金刀具进行的硬车削：干式和最小量润滑（MQL）下的磨损行为

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摘要

In the present work, experimental investigations carried out to assess the applicability of HiPIMS (High Power Impulse Magnetron Sputtering)-coated carbide tools to hard turning (55 HRC) and to address the widely debated topic about the use of coolants in hard turning are presented. Tool wear progressions and hence, tool life, different tool wear forms and wear mechanisms observed for tools coated with HiPIMS coating technique, namely, nano-composite AlTiN, nanocomposite multi-layer TiAlN/TiSiN and nanocrystalline AlTiCrN are presented along with the images captured by digital and electron microscope. Characterization results of all the coated tools in terms of their average coating thickness (measured using Calotest and Fractographs), adhesion strength of the coating(s) (determined using Scratch test), composition and microhardness (using EDAX and Vickers microhardness test, respectively) are presented. Experimental observations indicate higher tool life with nano-crystalline AlTiCrN coated carbide tools which shows encouraging potential of these tools to hard turning. Improvement in tool life of almost 20-25% has been observed under minimum quantity lubrication (MQL) due to better cooling and lubricating effects. However, this effect was more prominent at higher cutting speed of 150 m/min.
机译：在当前的工作中，进行了实验研究，以评估涂有HiPIMS（大功率脉冲磁控溅射）的硬质合金刀具在硬车削（55 HRC）上的适用性，并解决有关在硬车削中使用冷却剂的广泛争议的话题。 。呈现了使用HiPIMS涂层技术涂覆的工具（即纳米复合AlTiN，纳米复合多层TiAlN / TiSiN和纳米晶体AlTiCrN）观察到的工具磨损进程，以及由此得出的工具寿命，不同的工具磨损形式和磨损机理，以及由HIPIMS捕获的图像。数字和电子显微镜。所有涂层工具的表征结果，包括平均涂层厚度（使用Calotest和Fractographs测量），涂层的附着强度（使用划痕测试确定），成分和显微硬度（分别使用EDAX和Vickers显微硬度测试）被提出。实验观察表明，纳米晶AlTiCrN涂层硬质合金刀具具有更长的刀具寿命，这表明这些刀具具有硬车削的潜力。在最小量的润滑（MQL）下，由于更好的冷却和润滑效果，刀具寿命提高了近20-25％。但是，在150 m / min的更高切削速度下，这种效果更为突出。

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