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BAO Yefeng, XIE Bingqi, SONG Qining, JIANG Yongfeng. Study on erosion resistance of FeCoCrNiB0.2Mox coatings cladded by laser[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(5): 7-13. DOI: 10.12073/j.hjxb.20201027001
Citation: BAO Yefeng, XIE Bingqi, SONG Qining, JIANG Yongfeng. Study on erosion resistance of FeCoCrNiB0.2Mox coatings cladded by laser[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(5): 7-13. DOI: 10.12073/j.hjxb.20201027001
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Study on erosion resistance of FeCoCrNiB0.2Mox coatings cladded by laser

  • Hohai University, Changzhou, 213022, China

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  • Received Date: October 26, 2020
  • Available Online: May 27, 2021
    Graphical Abstract
    • Abstract
  • To improve the erosion resistance of the steel, FeCoCrNiB0.2Mox High-entropy alloy coatings were prepared on Q235 steel by laser cladding. An optical microscope was used for structure observation. The phase composition and lattice distortion of the coatings were studied by XRD. The effect of Mo on hardness and erosion resistance were discussed. The results show that: The FeCoCrNiB0.2Mox coatings were composed of dendrites, and fine-grained regions can be observed between the layers. Because the higher cooling rate of laser cladding results an inhibition of the precipitation of intermetallic compounds, the FeCoCrNiB0.2Mox coatings are completely composed of single-phase BCC solid solution. An erosion rate below 2.25 × 10−4 g/h suggested that the FeCoCrNiB0.2Mox high-entropy coatings present a good performance on erosion resistance due to its high hardness which was higher than 600 HV0.2. And with the rise of Mo content, the lattice distortion of the coating becomes more severe, which leading to an increasing on hardness, and improvement of erosion resistance. Meanwhile, the slurry erosion mechanism of the FeCoCrNiB0.2Mox high-entropy coatings is micro-cutting and forging extrusion.
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    • References (24)
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