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Effect of Mo and nano-Nd2O3 on the microstructure and wear resistance of laser cladding Ni-based alloy coatings

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Abstract

Three kinds of coatings were successfully prepared on Q235 steel by laser cladding technique through adulterating with Mo and nano-Nd2O3 into Ni-based alloys. The effect of Mo and nano-Nd2O3 on the microstructure and properties of Ni-based coatings was investigated systematically by means of optical microscopy, X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, and microhardness testing and wear testing. The results indicated a certain amount of fine grains and polygonal equiaxed grains synthesized after adding Mo and nano-Nd2O3. Both the microhardness and wear resistance of Ni-based coatings improved greatly with a moderate additional amount of Mo and nano-Nd2O3. The largest improvement in microhardness was 31.9 and 14.7 %, and the largest reduction in loss was 45.0 and 30.7 %, respectively, for 5.0 wt% Mo powders and 1.0 wt% nano-Nd2O3. The effect of Mo on microhardness and wear resistance of laser cladding Ni-based alloy coatings is greater than the effect of nano-Nd2O3.

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Acknowledgments

Authors wish to express thanks to financial support from Excellent Young Talents Foundation Key Project in University of Anhui of China (No. 2013SQRL144ZD).

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Authors and Affiliations

  1. Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, People’s Republic of China

    Lin Ding, Shengsun Hu & Junqi Shen

  2. School of Automobile and Mechanical and Electrical Engineering, Lu’an Vocation Technology College, Lu’an, 237158, People’s Republic of China

    Xiumin Quan

Authors
  1. Lin Ding
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  2. Shengsun Hu
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  3. Xiumin Quan
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  4. Junqi Shen
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Correspondence to Junqi Shen.

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Ding, L., Hu, S., Quan, X. et al. Effect of Mo and nano-Nd2O3 on the microstructure and wear resistance of laser cladding Ni-based alloy coatings. Appl. Phys. A 122, 288 (2016). https://doi.org/10.1007/s00339-016-9905-1

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  • DOI: https://doi.org/10.1007/s00339-016-9905-1

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