NSF/EPA Partnership for Environmental Research: Novel Nanocoatings on Cutting Tools for Dry Machining

9613111 Komanduri在机械加工中使用切削液一直是金属加工业的标准做法。最近的环境限制要求在干式机械加工或其他技术上进行创新。该研究项目旨在开发干式加工刀具上的新型纳米涂层技术。本研究项目将进行以下研究：(1)利用闭场非平衡磁控溅射(CFUMS)在硬质合金刀具上合成具有特征的多层纳米涂层系统；(2)针对特定的应用优化纳米涂层结构、硬质合金层厚度、金属夹层厚度和层数以及CFUMS的沉积条件；(3)评估多层纳米涂层系统在不同进给量、速度和切割深度下对选定的加工材料的干切削加工；(4)评估纳米涂层系统在干式加工中的性能，并将其与未涂层以及候选的商业涂层系统进行比较；(5)确定刀具磨损的微观机制，并与多层纳米涂层的结构和组成有关；(6)评估使用大量纳米涂层进行干法加工的回报，并确定纳米涂层以及其他材料的干法加工的新应用。这个项目是一个工业合作伙伴和大学之间的合作。这些研究的结果可以为机械加工行业提供有用的发现。

9613111 Komanduri The use of cutting fluid in machining has been the standard practice in metal working inudustry. Recent environmental constraints necessitate innovations on dry machining or other techniques. The research project is to develop novel nanocoating technologies on cutting tools for dry machining. This research project will conduct the following investigations: (1) synthesize the characterize multilayer nanocoating systems on cemented tungsten carbide cutting tools by closed field unbalanced megnetron sputtering (CFUMS); (2) optimize the nanocoating architecture, thickness of the carbide layer, metal interlayer thickness and number of layers, and deposition conditions of CFUMS for a given application; (3) evaluate multilayer nanocoating systems in dry machining of selected work materials over a wide range of feeds, speeds, and depths of cut; (4) evaluate the performance of the nanocoating systems in dry machining and compare it with uncoated as well as candidate commercial coating systems; (5) determine the micromechanisms of tool wear and relate to the structure and composition of multilayer nanocoatings and (6) assess the payback of dry machining with numerous nanocoatings and identify new applications for nanocoatings as well as for dry machining of other materials. This project is a collaboration between an industrial partner and the University. The outcome of these studies could provide useful findings for the machining industry.