Optimizing of PVD coatings for dry cutting applications by FE-simulation

通过 FE 模拟优化干切削应用的 PVD 涂层

基本信息

批准号：
258383513
负责人：
Professor Dr. Bernd Breidenstein
金额：
--
依托单位：
Fachgebiet und Institut für Werkstoffkunde
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/258383513?language=en
关键词：
Optimizing PVD coatings dry cutting

项目摘要

The coating of cutting tools by means of PVD (physical vapor deposition) hard coatings increases the tool life and productivity significantly. In many cases, use of lubricants can be omitted due to the thermal barrier effect of the films as well as reduction of the coefficient of friction. Depending on the type of cutting operation, individually tailored PVD coatings can improve tool life time by specific design of coating properties such as hardness, oxidation resistance, friction coefficient and diffusivity.The requirements for these coatings vary according to the task to be performed and are influenced by the material to be machined, the machining parameters and the total geometry of the machining tool. Today, a conventional development of a coating system for a specific cutting task includes a variety of test series with elaborate experimental parameter studies. In particular, the investigation of the cutting behaviour in practical experiments causes significant ressources, time and costs.The goal of the proposed research project is to optimize the development process of cutting tools with PVD hard coatings for dry machining through the use of FE simulations. Therefore, fundamental conceptual studies concerning the simulation assisted synthesis of coating systems on the basis of CrAl(X)N dry machining operation will be conducted.The wear simulation using component - tool contact will be supplemented by the PVD coating. The specifications of the layer properties on basis of FE simulations are realized by adjustment of the PVD synthesis parameters and experimentally verified. From the interaction between FE simulation, synthesis of PVD coatings, fundamental characterization of property profiles and dry cutting experiments the development process of coating systems will be significantly optimized.

通过 PVD（物理气相沉积）硬质涂层对切削刀具进行涂层可显着提高刀具寿命和生产率。在许多情况下，由于薄膜的热障效应以及摩擦系数的降低，可以省略润滑剂的使用。根据切削操作的类型，单独定制的 PVD 涂层可以通过特定的涂层性能（例如硬度、抗氧化性、摩擦系数和扩散率）设计来延长刀具使用寿命。对这些涂层的要求根据要执行的任务而有所不同，受待加工材料、加工参数和加工刀具的总体几何形状的影响。如今，针对特定切割任务的涂层系统的传统开发包括各种测试系列以及详细的实验参数研究。特别是，实际实验中切削行为的研究需要大量的资源、时间和成本。拟议研究项目的目标是通过使用有限元模拟来优化用于干式加工的带有 PVD 硬质涂层的切削刀具的开发过程。因此，将进行基于 CrAl(X)N 干式加工操作的涂层系统模拟辅助合成的基本概念研究。使用部件-刀具接触的磨损模拟将由 PVD 涂层补充。通过调整PVD合成参数并通过实验验证，实现了基于有限元模拟的层特性规范。通过有限元模拟、PVD 涂层的合成、性能概况的基本表征和干切削实验之间的相互作用，涂层系统的开发过程将得到显着优化。