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Article

Influence of Microstructure and Chemical Composition on Microhardness and Wear Properties of Laser Borided Monel 400

1
Faculty of Mechanical Engineering, Institute of Mechanical Technology, Poznan University of Technology, ul. Piotrowo 3, 61-138 Poznan, Poland
2
Faculty of Materials Engineering and Technical Physics, Institute of Materials Science and Engineering, Poznan University of Technology, ul. Jana Pawła II 24, 61-138 Poznan, Poland
3
Faculty of Civil and Transport Engineering, Institute of Machines and Motor Vehicles, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(24), 5757; https://doi.org/10.3390/ma13245757
Received: 10 November 2020 / Revised: 3 December 2020 / Accepted: 15 December 2020 / Published: 16 December 2020
In this study, wear properties of Monel 400 after laser alloying with boron are described. Surfaces were prepared by covering them with boron paste layers of two different thicknesses (100 µm and 200 μm) and re-melting using diode laser. Laser beam power density was equal to 178.3 kW/cm2. Two laser beam scanning velocities were chosen for the process: 5 m/min and 50 m/min. Surfaces alloyed with boron were investigated in terms of wear resistance, and the surface of untreated Monel 400 was examined for comparison. Wear tests were performed using counterspecimen made from steel 100Cr6 and water as a lubricant. Both quantitative and qualitative analysis of surfaces after wear test are described in this paper. Additionally, microstructures and properties of obtained laser alloyed surfaces are presented. It was found that the wear resistance increased from four to tens of times, depending on parameters of the laser boriding process. The wear mechanism was mainly adhesive for surfaces alloyed with initial boron layer 100 µm thick and evolves to abrasive with increasing boron content and laser beam scanning velocity. Iron particles detached from counterspecimens were detected on each borided surface after the wear test, and it was found that the harder the surface the less built-ups are present. Moreover, adhered iron particles oxidized during the wear test. View Full-Text
Keywords: Monel 400; laser heat treatment; laser boriding; diode laser; wear resistance; wear mechanism Monel 400; laser heat treatment; laser boriding; diode laser; wear resistance; wear mechanism
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MDPI and ACS Style

Kukliński, M.; Bartkowska, A.; Przestacki, D.; Kinal, G. Influence of Microstructure and Chemical Composition on Microhardness and Wear Properties of Laser Borided Monel 400. Materials 2020, 13, 5757. https://doi.org/10.3390/ma13245757

AMA Style

Kukliński M, Bartkowska A, Przestacki D, Kinal G. Influence of Microstructure and Chemical Composition on Microhardness and Wear Properties of Laser Borided Monel 400. Materials. 2020; 13(24):5757. https://doi.org/10.3390/ma13245757

Chicago/Turabian Style

Kukliński, Mateusz, Aneta Bartkowska, Damian Przestacki, and Grzegorz Kinal. 2020. "Influence of Microstructure and Chemical Composition on Microhardness and Wear Properties of Laser Borided Monel 400" Materials 13, no. 24: 5757. https://doi.org/10.3390/ma13245757

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