Thermomechanical coating load in dependence of fundamental coating properties.
Thermomechanical coating load in dependence of fundamental coating properties.
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DOI：
10.1016/j.procir.2017.03.184
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Beblein;B. Breidenstein;B. Denkena;Casper Pusch;H. Hoche;M. Oechsner
中科院分区：
文献类型：
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作者：
S. Beblein;B. Breidenstein;B. Denkena;Casper Pusch;H. Hoche;M. Oechsner
刀具涂层系统的常规开发包括各种测试系列和详细的实验参数研究。特别是，切削行为的实验研究导致了大量的成本、时间和资源的消耗。为了使涂层性能适应切削加工的具体要求，希望通过对加工过程的模拟来减少涂层开发的实验工作量。因此，通过二维有限元切屑形成模拟，确定了影响AISI 4140切削过程中涂层热载荷的主要因素。为了提供模拟所需的热学和力学涂层性能，将craln基涂层沉积在切削齿上并进行了广泛的表征。在模拟中，涂层性能在craln基涂层的物理和技术边界之间变化。结果表明，杨氏模量、涂层厚度和摩擦系数对涂层内的热机械载荷和应力分布有显著影响。最后，对涂层刀片的切削性能进行了实验研究，并与仿真结果进行了比较。结果表明，涂层的分层程度受涂层厚度的影响较大。
The conventional development of a coating system for cutting tools includes a variety of test series with elaborate experimental parameter studies. In particular, experimental investigations of the cutting behavior cause a significant consumption of cost, time and resources. In order to adapt the coating properties to the specific requirements of the cutting process, it is desirable to reduce the experimental effort of coating development by simulation of the machining process. Therefore, the main factors of the thermo-mechanical coating load in machining AISI 4140 were identified by means of 2D FEM chip formation simulations. In order to provide the required thermal and mechanical coating properties for the simulations, CrAlN-based coatings were deposited onto cutting inserts and extensively characterized. Within the simulations, the coating properties were varied between the physical and technological boundaries of CrAlN-based coatings. It was shown that the Young's modulus, the coating thickness and the friction coefficient significantly influence the thermomechanical load and the stress distribution within the coating. Finally, the cutting performance of the coated inserts was experimentally investigated and compared with the results of the simulations. Here, it was shown that delamination of the coating is particularly influenced by coating thickness.