Influence on the Microstructure of Laser Cladding NiCrBSi Coatings with Electromagnetic Compound Field

Abstract:

A NiCrBSi coating was produced on a pure iron plate by laser cladding technology. Electric-magnetic compound field was applied in order to improve the quality of coating. The effect of electric-magnetic compound field on the microstructure and the phase composition of coating was investigated by OM and XRD, respectively. The results indicated that the phase composition of the coatings were γ-(Fe,Ni), Cr₂₃C₆, Cr₇C₃, CrB and Ni₃B with and without electromagnetic field. Microstructural observation showed that the grains were refined obviously by electromagnetic stirring. The electromagnetic stirring could change the direction of the heat dissipation and changed the direction of the columnar crystal at the bottom of the coating. High qualitative coating without porosity were obtained under electromagnetic field.

• Periodical: Solid State Phenomena (Volume 295)
• Pages: 15-20
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.295.15
• Online since: August 2019
• Authors: Lu Lu Zhai, Jun Wei Zhang, Chun Yan Ban*
• Keywords: Electromagnetic Field, Laser Cladding, Microstructure, NiCrBSi Coating

References

[1] J.L. Chen, J. Li, R. Song, et al. Effect of the scanning speed on microstructural evolution and wear behaviors of laser cladding NiCrBSi composite coatings, Optics & Laser Technology, 2015, 72:86-99.

DOI: 10.1016/j.optlastec.2015.03.015

[2] B.H. Yu, X.H. Hu, Y.E. Wu, et al. Studies of the effects and mechanism of electromagnetic stirring on the microstructures and hardness of laser cladding WC-Co based alloy coating, Chinese Journal of Lasers, 2010, 37(10):2672-2677.

DOI: 10.3788/cjl20103710.2672

[3] H.X. Liu, S.W. Ji, Y.H. Jiang, et al. Microstructure and property of Fe60 composite coatings by rotating magnetic field auxiliary laser cladding, Chinese Journal of Lasers, 2013, 40(1):115-120.

DOI: 10.3788/cjl201340.0103007

[4] H. Xu, Q.G. Zheng, Z.H. Ding, et al. Study on laser cladding hared alloy with electromagnetic shirring, Laser Technology, 2005, 29(5):449-451.

[5] L.Y. Qin, G. Yang, H.Y. Bian, et al. Experimental study on electromagnetic stirring assisted laser metal deposition Titanium alloy, Chinese Journal of Lasers, 2014, 41(3):0303004.

DOI: 10.3788/cjl201441.0303004

[6] L. Wang, S.Y. Song, Y.Hu, et al. Regulation research on microstructure of laser cladding under electric-magnetic synergistic effect, Chinese Journal of Lasers, 2014, 42:s103005.

[7] Y. Hu, L. Wang, Y.H. Li, et al. Effect of orientation lorentz force on molten pool exhaust in laser cladding, Chinese Journal of Lasers, 2018, http://kns.cnki.net/kcms/detail/31.1339.TN.20180411.1446.002.html.

[8] H.X. Liu, S.W. Ji, Y.H. Jiang, et al. Microstructure and property of treated prepared with magnetic Ni60CuMoW composite coating field and laser cladding process, High Power Laser and Particle Beams, 24(12):2901-2905.

DOI: 10.3788/hplpb20122412.2901

[9] C.Q. Wang. Solidification microstructure and stress control of Ni-based alloy coatings by mechanical vibration assisted laser cladding, Kunming University of Science and Technology, (2013).