Tribological performance of α-Fe(Cr)-Fe2B-FeB and α-Fe(Cr)-h-BN coatings obtained by laser melting |
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| Affiliation: | 1. Laboratoire Procédés Matériaux Instrumentation, ENSAM, 2 Bd du Ronceray, BP 93525, 49035 ANGERS, Cedex 01, France;2. Institut de Recherche en Génie Civil et Mécanique, CRTT, Bd de l’Université – 44602 SAINT-NAZAIRE, France;1. National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, PR China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, PR China;1. Department of Energy Systems Research, Ajou University, Suwon 443-749, Republic of Korea;2. Department of Physics, Ajou University, Suwon 443-749, Republic of Korea;1. Beijing Institute of Aerospace Control Devices, Beijing 100094, China;2. School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;3. State Key Laboratory of High Power Semiconductor Lasers, School of Science, Changchun University of Science and Technology, Changchun 130022, China;4. Laboratory of All-solid-state Source, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;1. School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China;2. Key Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266520, China |
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| Abstract: | α-Fe(Cr)-h-BN and α-Fe(Cr)-Fe2B-FeB coatings on X30Cr13 stainless steel are synthesized by laser melting with incorporation of hexagonal boron nitride, or by alloying of boron. The additive powders are deposited on steel before pulsed irradiation by Nd-YAG laser beam. The solidification structures of the obtained coatings are investigated by optical microscopy and X-ray diffractometry. The mechanical properties are investigated by nanoindentation and the tribological behaviour is characterized on pin-on-disc tribometer, under dry-sliding conditions with different loads and a temperature range 25–500 °C. h-BN-α-Fe(Cr) and Fe2B-α-Fe(Cr) coatings have average hardnesses 10.0 and 14.5 GPa, respectively, while hardness of untreated stainless steel is 4.2 GPa. In comparison with this untreated steel, the sliding contact on ceramic (ruby) of such coating shows a lower coefficient friction and a definitively better wear resistance. |
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