Microstructure and Mechanical Properties of High-Frequency Induction Cladding Ni-Based Alloy Coating with La₂O₃ Addition

Abstract:

Ni-based alloy coatings with different contents of La₂O₃ addition were prepared by high-frequency induction cladding. Microstructure of the coatings was investigated using X-ray diffractometer (XRD), electron probe micro-analyzer (EPMA) and energy dispersive spectrometer (EDS). Wear resistance and microhardness distribution of coatings were tested by means of M-2000A friction wear tester and Vickers microhardness tester, respectively. Results show that the increasing content of La₂O₃ attributes to the decrease of the pores in the coating. Primary phases of the Ni-based alloy coating with La₂O₃ addition fabricated by high-frequency induction cladding include γ-Ni, Cr₇C₃, Cr₂₃C₆ and Cr₂B. EDS analysis reveals that La₂O₃ addition tends to gather in the top region of the coating and mainly exists in γ-Ni solid-solution. Because of the uniform distribution of hard phases and grain refinement, coating with 6% La₂O₃ addition possesses better wear resistance under dry sliding wear condition. Microhardness of the transition region in coating with La₂O₃ addition is higher than that in coating without La₂O₃. Top region of the coatings with 4% and 6% content of La₂O₃ exhibits higher microhardness than the bottom region due to the La₂O₃ concentration.

• Periodical: Materials Science Forum (Volume 934)
• Pages: 111-116
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.934.111
• Online since: October 2018
• Authors: Rui Sun, Qi Li, Rui Hai Wang, Yong Jun Shi*
• Keywords: High-Frequency Induction Cladding, La₂O₃ Addition, Mechanical Properties, Microstructure

References

[1] Z.T. Wang, Y.D. Wang and H.H. Chen: Materials Protection Vol.39 (2007) pp.10-12. (in Chinese).

[2] G. Hu, H.M. Meng and J.Y. Liu: Applied Surface Science Vol. 317 (2014), pp.378-384.

[3] J.H. Chang, S.K. Tzeng, J.M. Chou, R.I. Hsieh and J.L. Lee: Wear Vol.270 (2011), pp.294-301.

[4] D.Y. He, J. Xu, R. Ma and J.M. Jiang: Transactions of the China Welding Institution Vol.29 (2008), pp.1-4. (in Chinese).

[5] C.L. Wang, Y Gao, Z.C. Zeng and Y.K. Fu: Journal of Alloy and Compounds Vol.727 (2017), pp.278-285.

[6] N. Zhao, L. Tao, H. Guo and M.Q. Zhang: Rare Metal Materials & Engineering Vol.46 (2017). P.2092-(2096).

[7] P. Farahmand, S. Liu, Z. Zhang and R. Kovacevic: Ceramics International Vol.40 (2014), pp.15421-15438.

[8] H.J. Niu and I.T.H. Chang: Scripta Materialia, Vol.41 (1999), pp.25-30.

[9] S.P. Sharma, D.K. Dwivedi and P.K. Jain: Wear Vol.267 (2009), pp.853-859.