Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 263, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2021.124407
Keywords
Coating; Mechanical property; Carbide; Amorphous phase; Corrosion resistance
Categories
Funding
- National Natural Science Foundation of China [51801114, 51971121]
- Major Science and Technology Innovation Engineering Projects of Shandong Province [2019JZZY010360]
- Project of Shandong Province Higher Educational Science and Technology Program [J17KA019]
- Natural Science Foundation of Shandong Province [ZR201910250230]
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Fe-based amorphous coatings synthesized with Fe44Cr30Mo20B3C3 powders on Q235 substrate at different laser powers exhibit enhanced hardness and wear resistance. The synergistic effect between the amorphous phase and Cr23C6 contributes to the improvement of mechanical properties. The presence of Cr and the amorphous phase also enhances the passivation phenomenon and improves the corrosion resistance of the coatings.
Fe-based amorphous coatings were synthesized with Fe44Cr30Mo20B3C3 powders at different laser powers on Q235 substrate at different laser powers. The microstructure and mechanical property of the coatings were investigated. X-ray diffraction and the thermodynamic analysis results indicate the presence of both amorphous and crystalline phases in the coating. The highest hardness up to 917 HV0.5 is obtained at 1300 W, which is about 5 times that of the substrate. From the abrasive test, the coating obtained at lower laser power exhibits shallower grooves and lower weight loss, indicating better wear resistance. The synergism of the amorphous phase and Cr23C6 contributes to the improvement of the mechanical properties. The existence of Cr and the amorphous phase also promotes the passivation phenomenon and improves the corrosion resistance of the coating.
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