Tribological properties of solid solution strengthened laser cladded NiCrBSi/WC-12Co metal matrix composite coatings

Bergant, Zoran (avtor), Šetina Batič, Barbara (avtor), Felde, Imre (avtor), Šturm, Roman (avtor), Sedlaček, Marko (avtor)

NiCrBSi, WC-12Co and NiCrBSi with 30, 40 and 50 wt.% WC-12Co coatings were produced on low carbon steel by laser cladding with an Nd:YAG laser with a multi-jet coaxial cladding-nozzle. The microstructure properties after WC-12Co alloying were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), electron backscatter diffraction (EBSD) and Vickers hardness tests. The resulting microstructures consisted of a γ-Ni and Ni$_3$B matrix, strengthened with Co and W, Ni$_3$Si, CrB, Cr$_7$C$_3$, Cr$_{23}$C$_6$ , WC/W$_2$C phases. In coatings with 30, 40 and 50 wt.% WC-12Co, a solid solution, strengthened multi-matrix NiCrWCo phase formed, which yielded a higher matrix hardness. Wear tests that monitored the friction coefficients were performed with a tribometer that contained a ball-on-disc configuration, Al$_2$O$_3$ counter-body and reciprocal sliding mode at room temperature. The major wear mode on the NiCrBSi coatings without the WC-12Co was adhesive with a high wear rate and visible material loss by flaking, delamination and micro-ploughing. The addition of WC-12Co to the NiCrBSi coating significantly increased the wear resistance and changed the major wear mechanism from adhesion to three-body abrasion and fatigue wear.

• Jezik: Angleški jezik
• Ključne besede: wear, solid-solution strengthening, laser cladding, NiCrBSi, WC-Co, coating
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 20 str.
• Številčenje: Vol. 15, iss. 1, art. 342
• PID: 20.500.12556/RUL-134322
• UDK: 620.1:539.92
• ISSN pri članku: 1996-1944
• DOI: 10.3390/ma15010342
• COBISS.SI-ID: 92175107
• Datum objave v RUL: 06.01.2022

Gradivo je del revije

• Naslov: Materials
• Skrajšan naslov: Materials
• Založnik: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 04.01.2022

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: obraba, utrjevanje, lasersko oblaganje, prevleke