Microstructure and friction properties of AlTiCrN coating prepared by magnetron sputtering on surface of YT30 tool

doi:10.13251/j.issn.0254-6051.2020.11.043

Abstract

Abstract: In order to improve the tool performance and optimize magnetron sputtering parameters, the preparation process optimization of the AlTiCrN coating was studied, the microstructure and binding force between the coating and substrate were analyzed, and the coating wear resistance under different loading conditions was compared. The results show that the deposition time of 120 min and deposition power of 200 W are the optimal magnetron sputtering parameters. The phase composition of AlTiCrN coating consists of AlTiCrN, Al and CrN. AlTiCrN(111) peaks show sharp diffraction peaks, and the coating reaches a high degree of crystallization. The coating is mainly composed of triangular cone structure and many fine grains are formed in the interstice. The upper layer of coating is mainly composed of columnar grains and the lower layer of coating is mainly composed of fibrous grains. Scratch tests on the AlTiCrN coating reveal a sudden change in friction at loads of 19 N and 32 N. The friction coefficient of YT30 tool coated by magnetron sputtering is lower than that of uncoated tools, indicating that AlTiCrN coating can significantly improve the wear resistance of the tools. When the loading load increases, the depth of tool grinding mark shows a more gentle transition. After increasing the load to 5 N, a large number of grinding particles are formed on both sides of the grinding mark, and the width of the grinding mark is significantly increased, no coating peeling occurs.

Key words: YT30 tool, AlTiCrN coating, magnetron sputtering, microstructure, friction properties

CLC Number:

TG146

Tan Daqing, Hu Shaohua, Wan Yuan, Tan Wei. Microstructure and friction properties of AlTiCrN coating prepared by magnetron sputtering on surface of YT30 tool[J]. Heat Treatment of Metals, 2020, 45(11): 222-225.

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