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Article

Influence of Laser Cladding Parameters on Microstructure, Microhardness, Chemical Composition, Wear and Corrosion Resistance of Fe–B Composite Coatings Reinforced with B4C and Si Particles

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Institute of Materials Technology, Faculty of Mechanical Engineering, Poznan University of Technology, ul. Piotrowo 3, 61-138 Poznan, Poland
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Institue of Materials Science and Engineering, Faculty of Materials Engineering and Technical Physics, Poznan University of Technology, ul. Jana Pawła II 24, 61-138 Poznan, Poland
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Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava, J. Bottu 25, 917 24 Trnava, Slovakia
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Author to whom correspondence should be addressed.
Coatings 2020, 10(9), 809; https://doi.org/10.3390/coatings10090809
Received: 28 July 2020 / Revised: 18 August 2020 / Accepted: 20 August 2020 / Published: 21 August 2020
The paper presents the study results of a laser cladding process of C45 steel using powder mixtures. The aim of this study was to investigate the microstructure, X-ray diffraction (XRD), chemical composition (EDS), microhardness, corrosion resistance and wear resistance of the newly obtained coatings. Modified coatings were prepared using laser cladding technology. A 1 kW continuous wave Yb:YAG disk laser with a powder feeding system was applied. Two different powder mixtures as well as various laser beam parameters were used. The first powder mixture contained Fe–B, and the second mixture was Fe–B–B4C–Si. Two values of laser beam power (600 and 800 W) and three values of scanning speed (600, 800, and 1000 mm/min) were applied during the studies. As a result of the influence of the laser beam, the zones enriched with modifying elements were obtained. Based on the results of XRD, the presence of phases derived from borides and carbides was found. In all cases analyzed, EDS studies showed that there is an increased content of boron in the dendritic areas, while there is an increased silicon content in interdendritic spaces. The addition of B4C and Si improved properties such as microhardness as well as wear and corrosion resistance. The microhardness of the coating increased from approx. 400 HV to approx. 1100 HV depending on the laser parameters used. The best corrosion resistance was obtained for the Fe–B–B4C–Si coating produced using the highest laser beam scanning speed. An improvement in wear resistance can be seen after wear tests, where the weight loss decreased from about 0.08 g to about 0.05 g. View Full-Text
Keywords: laser cladding; microstructure; boron carbides; Fe–B coatings; microhardness; corrosion resistance; wear resistance; B4C; Si laser cladding; microstructure; boron carbides; Fe–B coatings; microhardness; corrosion resistance; wear resistance; B4C; Si
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MDPI and ACS Style

Bartkowski, D.; Bartkowska, A.; Piasecki, A.; Jurči, P. Influence of Laser Cladding Parameters on Microstructure, Microhardness, Chemical Composition, Wear and Corrosion Resistance of Fe–B Composite Coatings Reinforced with B4C and Si Particles. Coatings 2020, 10, 809. https://doi.org/10.3390/coatings10090809

AMA Style

Bartkowski D, Bartkowska A, Piasecki A, Jurči P. Influence of Laser Cladding Parameters on Microstructure, Microhardness, Chemical Composition, Wear and Corrosion Resistance of Fe–B Composite Coatings Reinforced with B4C and Si Particles. Coatings. 2020; 10(9):809. https://doi.org/10.3390/coatings10090809

Chicago/Turabian Style

Bartkowski, Dariusz, Aneta Bartkowska, Adam Piasecki, and Peter Jurči. 2020. "Influence of Laser Cladding Parameters on Microstructure, Microhardness, Chemical Composition, Wear and Corrosion Resistance of Fe–B Composite Coatings Reinforced with B4C and Si Particles" Coatings 10, no. 9: 809. https://doi.org/10.3390/coatings10090809

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