期刊
SURFACE & COATINGS TECHNOLOGY
卷 446, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2022.128766
关键词
Inconel 718; Stellite3 composite coatings; Laser cladding; Oxidation resistance; Wear resistance
资金
- National Natural Science Foundation of China [52075559]
- Hunan Provincial Key Research & Development Program [2022GK2030]
- Hunan Provincial Natural Science Foundation [2021JJ31161]
- Open Fund of Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education of China [GFST2021KF03]
- Postgraduate Scientific Research Innovation Project of Hunan Province
A series of Stellite3 matrix composite coatings containing Ti3SiC2/Cu were prepared by laser cladding to improve the wear and oxidation resistance of IN718 superalloy. The coatings exhibited higher microhardness and improved wear resistance, with the Stellite3-5%Ti3SiC2-10%Cu coating performing the best. Furthermore, the Stellite3-10% Ti3SiC2 coating showed better oxidation and wear resistance under high temperatures.
To improve the wear and oxidation resistance of IN718 (Inconel 718) superalloy under severe conditions, a series of Stellite3 matrix composite coatings containing Ti3SiC2/Cu were prepared by laser cladding. Further, the phase compositions, microstructure, microhardness, oxidation and tribological behaviors were systematically studied. The results indicated that the coatings' microhardness is 1.8-2.5 times higher than the IN718, and the wear rates decreased obviously at room temperature, with the Stellite3-5%Ti3SiC2-10%Cu coating performing the best wear resistance. In addition, under high temperatures, the oxidation rate constant and wear rate of Stellite3-10% Ti3SiC2 coating are 2.7065 mg(2).cm(-4).h(-1) and 6.09 x 10(-5) mm(3)/N.m with better oxidation resistance and wear resistance, where oxidation wear and slight abrasive wear predominating. This work explored the feasibility and detailed effects of Ti3SiC2 and Cu for enhancing the Stellite3 composite coatings.
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