Effect of B4C addition on microstructure and tribological performance of laser cladded WC−10Co4Cr coatings

WC −10Co4Cr−5% B 4 C, −10% B 4 C, and −15% B 4 C coatings were fabricated on Cr12MoV steel by laser cladding (LC) to improve its wear resistance. The effect of B 4 C mass fraction on the phases, morphologies, and chemical elements of obtained coatings were investigated using an X-ray diffraction (XR...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 2023-04, Vol.58 (13), p.5822-5836
Main Authors: Detao, Liu, Chuang, He, Fan, Wang, Dejun, Kong
Format: Article
Language:English
Subjects:
Abrasive wear
Adhesive wear
Boron carbide
Characterization and Evaluation of Materials
Chemical elements
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Electron microscopes
Grain refinement
Laser beam cladding
Materials Science
Metals & Corrosion
Microstructure
Performance evaluation
Polymer Sciences
Protective coatings
Solid Mechanics
Solid solutions
Solution strengthening
Tribology
Tungsten carbide
Wear mechanisms
Wear rate
Wear resistance
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:WC −10Co4Cr−5% B 4 C, −10% B 4 C, and −15% B 4 C coatings were fabricated on Cr12MoV steel by laser cladding (LC) to improve its wear resistance. The effect of B 4 C mass fraction on the phases, morphologies, and chemical elements of obtained coatings were investigated using an X-ray diffraction (XRD), scanning electron microscope (SEM) and energy-dispersive spectroscopy (EDS), respectively, and the tribological performance was evaluated using a ball–on–disk tester. The results show that the average COFs and wear rates of WC−10Co4Cr−5% B 4 C, −10% B 4 C, and −15% B 4 C coatings are increased with the increase in B 4 C mass fraction, and the WC−10Co4Cr−5% B 4 C coating has the best wear resistance among the three kinds of coatings, which is attributed to the effects of grain refinement and solid solution strengthening. The excessive B 4 C particles cause a large decomposition of WC, and the coating microstructure becomes coarse when the B 4 C mass fraction exceeds 5%, which results in the tribological performance decreasing. Moreover, the wear mechanism of WC−10Co4Cr−5% B 4 C and −10% B 4 C coatings is abrasive wear, while that of WC−10Co4Cr−15% B 4 C coating is abrasive wear and adhesive wear.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-023-08233-9