Oxidation post-treatment of hard AlTiN coating for machining of hardened steels
Oxidation post-treatment of hard AlTiN coating for machining of hardened steels
复制标题
用于淬硬钢加工的硬质 AlTiN 涂层的氧化后处理
DOI：
10.1016/j.surfcoat.2009.07.010
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发表时间：
2009
影响因子：
5.4
通讯作者：
A. Gutiérrez
中科院分区：
文献类型：
--
作者：
J. Endrino;G. Fox;R. Galindo;W. Kalss;S. Veldhuis;L. Soriano;J. Andersson;A. Gutiérrez
在本研究中，采用阴极电弧蒸发沉积纳米晶 Al0.67Ti0.33N 硬质 PVD 涂层的硬质合金球头立铣刀在受控气氛环境（氩气+氧气混合物）和真空中在 700°C 下退火 2 小时。使用 N-K 和 O-K 边缘的截面扫描电子显微镜 (SEM) 和 X 射线吸收光谱 (XAS) 分析了处理后的涂层表面的结构和性能的变化。切削刀具经过淬硬 H13 钢 (HRC 50) 的球头立铣加工，其中温度或应力主导现象控制刀具寿命。获得的数据表明，AlTiN 涂层切削刀具可以在低温条件下退火后进行改性，并且应被视为复合表面工程材料。结果表明，如果在含氧气氛中进行 AlTiN 退火，则可以延长刀具寿命。为了使退火Al0.67Ti0.33N涂层刀具在高温和应力切削条件下具有更好的耐磨性，需要对各种不同的特性进行优化。
In this study, cemented carbide ball nose end mills with nano-crystalline Al0.67Ti0.33N hard PVD coatings deposited by cathodic arc evaporation were annealed at 700°C during 2h in a controlled atmosphere environment (argon+oxygen mixture) and in vacuum. The changes of structure and properties of the treated coating surfaces have been analyzed using both cross-sectional scanning electron microscopy (SEM) and x-ray absorption spectroscopy (XAS) of the N–K and O–K edges. Cutting tools have been run through ball nose end milling of hardened H13 steel (HRC 50) where temperature or stress dominating phenomena control tool life. The data obtained indicate that an AlTiN coated cutting tool can be modified upon annealing at low temperature conditions and should be considered as a composite surface engineered material. It is shown that increased tool life could be achieved if annealing of AlTiN is performed in an oxygen-containing atmosphere. A variety of different characteristics should be optimized to achieve better wear resistance of the cutting tools with annealed Al0.67Ti0.33N coating under high temperature and stress cutting conditions.