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| Research on the AlCrSiN/AlCrN/AlCrON/AlCrN Multilayer Coatings |
| Received:December 05, 2021 Revised:January 19, 2022 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.02.017 |
| KeyWord:arc ion plating multilayer coating mechanical property friction and wear cutting temperature |
| Author | Institution |
| ZHANG Shi-yong |
Tianjin Key Laboratory of High Speed Cutting and Precision Manufacturing, Tianjin University of Technology and Education, Tianjin , China |
| LIU Yan-mei |
Tianjin Key Laboratory of High Speed Cutting and Precision Manufacturing, Tianjin University of Technology and Education, Tianjin , China |
| ZHANG Ya-qian |
Tianjin Key Laboratory of High Speed Cutting and Precision Manufacturing, Tianjin University of Technology and Education, Tianjin , China |
| GUO Hua-shuai |
Tianjin Key Laboratory of High Speed Cutting and Precision Manufacturing, Tianjin University of Technology and Education, Tianjin , China |
| WANG Tie-gang |
Tianjin Key Laboratory of High Speed Cutting and Precision Manufacturing, Tianjin University of Technology and Education, Tianjin , China |
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| Abstract: |
| In order to solve the problem of low efficiency and short life of hard alloy tools in high-speed dry cutting of difficult-to-machine materials, it is urgent to improve the heat resistance of the tool coatings. AlCrON thermal barrier layers are periodically implanted in the AlCrSiN coating and placed on both sides of it. Depositing the AlCrN layer for clamping can improve the toughness of the oxygen-containing layer, maintain the higher strength of the coated tool and improve its heat resistance. In this paper, an automatic arc ion plating machine is used to develop AlCrSiN/AlCrN/AlCrON/AlCrN multilayer composite coatings with different modulation cycles. The scratch tester and nanoindenter are used to test the mechanical properties, friction and wear of the multilayer composite coatings. The testing machine tests the tribological properties of the coating, using a scanning electron microscope (SEM), X-ray diffractometer (XRD) and energy spectrometer (EDS) to analyze the surface morphology, phase composition and chemical composition of the multilayer composite coating. The results show that the encapsulation of AlCrN coating effectively improves the toughness and hardness of AlCrON coating, and as the modulation period changes, the mechanical properties and microstructure of the coating also change. When the coating modulation period is 300 nm. The best modulation cycle process is selected to deposit a multilayer composite coating on the surface of the cemented carbide end mill, and the cutting performance is compared with the AlTiN coated milling cutter.The surface of the coating is smooth and compact, without obvious columnar grains inside; at this time, the mechanical properties of the coating are the best, and the friction coefficient and wear rate are also the lowest; for the dry cutting of hardened steel, compared with the AlTiN coated milling cutter. The cutting temperature of AlCrSiN/AlCrN/AlCrON/AlCrN multilayer composite coating tool is lower and the service life is longer. |
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