期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 891, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.161966
关键词
CrN coating; Multi-arc ion plating; Friction coefficient; Wear mechanism; Valve seat
资金
- National Natural Science Foundation of China [51705391]
- Serving the Local Special Project of Shaanxi Provincial Education Department [20JC018]
- Key Research and Development Plan of Shaanxi Province [2021GY-230]
The study used multi-arc ion plating technology to prepare CrN coating on the valve seat material surface, and the results showed that adjusting the Cr target current could change the grain size and structure of the coating, thereby affecting its mechanical properties and friction performance.
The multi-arc ion plating technology is used to prepare CrN coating on the valve seat material surface. Results show that the surface grains gradually increase in size and becomes less uniform with the increase of the Cr target current. At different Cr target currents, the main phases of the CrN coating are Cr, CrN, and Cr2N. The critical load of the coating and matrix is 49.2 N. When the Cr target current is 65 A, the nano-hardness is maximum (18.84 GPa), and Young's modulus is 255.41 GPa. The CrN coating can reduce the friction coefficient of the valve seat material from 0.62 to 0.48, thereby improving the wear-resistance behavior. The main wear mechanism is abrasive wear. (C) 2021 Elsevier B.V. All rights reserved.
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