期刊
SURFACE & COATINGS TECHNOLOGY
卷 334, 期 -, 页码 274-285出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2017.11.051
关键词
Laser cladding (LC); Carbon fibers; Nickel based coating; Electrochemical corrosion; Wear mechanisms
资金
- National Natural Science Foundation of China [61475117, 51471084]
- Applied Basic Research and Development Project of Tianjin City [12JCQNJC02800]
- Key Technology R & D Program of Tianjin City [13ZCZDGX01109]
- Foundation of Civil Aviation University of China [2014TJPUJG]
- Science and Development Foundation of Higher Education Institutions of Tianjin City [20120631]
- Outstanding Youth Foundation of Jiangxi Province [20162BCB23039]
To enhance the wear resistance and corrosion resistance of Ni-based coatings, carbon fibers reinforced nickel based composite coatings (CFs/Ni) were fabricated on the surface of 1Cr13 stainless steel by laser cladding (LC). The microstructure characteristics, microhardness, wear and corrosion performances of the composite coatings were investigated. The results show that CFs can effectively improve the corrosion and wear resistances of Ni-based coatings. With increasing laser scanning speed, the morphology of CFs in composite coatings is more integral and the corrosion and wear resistances of the composite coatings are improved. Especially, when laser scanning speed is increased to 8 mm/s, the average microhardness of the composite coating reaches up to 405 HV0.2, which is about 1.3 times higher than that of Ni-based coating. Moreover, the corrosion current density and the wear rate of the composite coating are only 7% and 55% of those of the Ni-based coating, respectively, which is attributed to the good properties and homogeneous distribution of CFs and finer microstructure of composite coating.
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