• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of nanomechanics science and technology >INVESTIGATING THE OPPORTUNITIES FOR DEFINING THE FATIGUE CHARACTERISTICS OF TOOLS WITH A NANOLAYER COATING DURING CUTTING
【24h】

INVESTIGATING THE OPPORTUNITIES FOR DEFINING THE FATIGUE CHARACTERISTICS OF TOOLS WITH A NANOLAYER COATING DURING CUTTING

机译：研究在切削过程中使用纳米层涂层来定义工具的疲劳特性的机会

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The efficiency of contemporary machine-building manufacture is closely related to ensuring the quality in conditions of intensification and high-level automation of technological processes. The use of numerically controlled machines, automated machine complexes, and flexible production systems increased the process output efficiency significantly due to concentration of operations in the same equipment. However, unstable and, sometimes, low operational characteristics of the cutting tools remain a factor restraining further increase of mechanical processing efficiency. One of the most promising ways to increase tool durability by protecting the contact surfaces (solid solutions and carbides) is the application of the cutting blades with a thin wear-resistant coating deposited layer by layer using ion-plasma methods. In such case, the thickness of the coating deposited in one run by the spray unit makes 20-200 nm. This work investigates hard alloys with such nanolayer nitride and oxide coating. Such blades with wear-resistant coating should meet strict requirements in the process of their manufacture and operation. One of the conditions for successful application of the blades is a high degree of adhesion between the coating and the substrate. In identical coating conditions, the degree of adhesion is defined by the structural defects on the coating-substrate interface and the residual stress. The residual stress may not only reduce the adhesion, but deteriorate the coating properties, i.e., generate microcracks resulting in the coating chipping and fracture. Thusly, the operation efficiency of tools equipped with blades with wear-resistant coating depends not only on the wear resistance of the coating, but also on the coating-substrate characteristics and the effective stress. Currently, the cutting properties of blades with a coating are evaluated only by the resistance, whereas methods for determining the fatigue characteristics of the blades with a deposited coating are nonexistent. In this work, we propose such method by testing it on nanolayer coating based on titanium nitride and aluminum oxide. Also, we investigate the modifications in the structure of the processed and worn samples of hard alloy with a coating.
机译：当代机械制造的效率与在集约化和工艺流程的高度自动化的条件下确保质量密切相关。由于集中在同一设备中进行操作，因此使用数控机床，自动化的机床系统和灵活的生产系统可以显着提高过程输出效率。然而，切削工具的不稳定以及有时低的工作特性仍然是限制机械加工效率进一步提高的因素。通过保护接触表面（固溶体和碳化物）来提高工具耐用性的最有前途的方法之一是在切割刀片上应用一层薄薄的耐磨涂层，该涂层使用离子等离子体方法进行沉积。在这种情况下，通过喷涂单元一次沉积的涂层厚度为20-200 nm。这项工作研究了具有这种纳米层氮化物和氧化物涂层的硬质合金。这种具有耐磨涂层的叶片在其制造和操作过程中应满足严格的要求。成功应用刀片的条件之一是涂层与基材之间的高度粘合。在相同的涂层条件下，粘合程度由涂层-基材界面上的结构缺陷和残余应力确定。残余应力不仅会降低粘附力，而且会降低涂层性能，即产生微裂纹，导致涂层碎裂和破裂。因此，配备有具有耐磨涂层的刀片的工具的操作效率不仅取决于涂层的耐磨性，而且取决于涂层-基材的特性和有效应力。当前，仅通过电阻来评估具有涂层的刀片的切削性能，而不存在用于确定具有沉积涂层的刀片的疲劳特性的方法。在这项工作中，我们通过在基于氮化钛和氧化铝的纳米层涂层上进行测试来提出这种方法。此外，我们研究了带有涂层的硬质合金加工和磨损样品的结构变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号