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Home > Archive>Volume 48, Issue 4, 2021 >21-28. DOI:10.12143/j.ztgc.2021.04.003
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Effect of laser texture on wettability of Fe-based amorphous alloy coating
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1.School of Engineering and Technology, China University of Geosciences, Beijing 100083, China;2.Zhengzhou Institute, China University of Geosciences (Beijing) , Zhengzhou Henan 451283, China;3.Institute of Exploration Techniques, CAGS, Langfang Hebei 065000, China;4.Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, Zhengzhou Henan 450006, China

Clc Number:

P634.4+1;TE921+.1

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    Abstract:

    In order to improve wear resistance and anti-balling of the drill bit during shale oil and gas drilling， Fe48Cr15Mo14C15B6Y2 amorphous alloy coatings were prepared on 35CrMo steel substrates by cold spraying （CS） and high velocity air fuel （HVAF） spraying with the hydrophobic surface of coatings made by UV laser. The microstructure and mechanical properties of the coatings were analyzed by scanning electron microscopy （SEM）， X-ray energy spectrometer （EDS） and X-ray diffractometer （XRD）， a contact angle meter was used to characterize the wettability of the coating， and the wetting mechanism was analyzed. The results showed that the Fe-based amorphous alloy coating prepared by CS technology had a denser microstructure and better thermal stability with the amorphous mass fraction up to 90%. The melt in the laser process rapidly cooled on the surface of the coating to form nano-sized condensation and agglomerates to form a micro-nano composite structure. With 7 laser scans， the CS coating had the highest water contact angle on the surface， which represented good hydrophobicity.

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History
  • Received:October 22,2020
  • Revised:January 27,2021
  • Adopted:February 01,2021
  • Online: April 10,2021
  • Published: April 10,2021
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