期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 556, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2020.120564
关键词
Fe-based amorphous coating; Detonation spray; Wear mechanism; Dry sliding wear
资金
- National Natural Science Foundation of China [51901092, 51674130, 52075234]
- Natural Science Foundation of Gansu Province [20JR5RA431]
- program of Science and Technology International Cooperation Demonstrative Base of Metal Surface Engineering along the Silk Road [2017D01003]
Fe-based amorphous coatings were successfully prepared on Q235 steel by detonation spray, and the wear mechanism and performance of the coatings were significantly influenced by the oxygen-fuel ratio. Coating B exhibited good wear resistance and the wear mechanism changed with sliding speed.
The Fe-based amorphous coatings were successfully prepared on Q235 steel by detonation spray under different oxygen-fuel ratios (2.5, 2.0 and 1.7), and the resultant coatings were named as coating A, B and C. The wear behaviors of the coatings against Al2O3 ball were investigated by dry sliding wear tests. The results show that coating B with the porosity of 0.5 vol.% and micmhardness of 766 +/- 31 Hv, exhibits good wear-resistance properties with wear rates of 14.7 x 10(-6) mm(3) N-1 m(-1), and the wear mechanism of the coatings changes from delamination wear to oxidative wear and abrasive wear, as the oxygen-fuel ratio changes from 2.5 to 1.7. Furthermore, it was found that the wear rate of coating B is more sensitive to the sliding speed. With the increase of the sliding speed (0.1 m s(-1)similar to 0.8 m s(-1)), the wear mechanism of coating B changes from oxidative wear to delamination wear.
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