DOI QR코드

DOI QR Code

Preparation of gas-atomized Fe-based alloy powders and HVOF sprayed coatings

  • Chau, Joseph Lik Hang (Materials and Chemical Research Laboratories, Industrial Technology Research Institute) ;
  • Pan, Alfred I-Tsung (Strategy and R&D Plan Office, Industrial Technology Research Institute) ;
  • Yang, Chih-Chao (Materials and Chemical Research Laboratories, Industrial Technology Research Institute)
  • 투고 : 2017.10.27
  • 심사 : 2018.04.02
  • 발행 : 2017.12.25

초록

High-pressure gas atomization was employed to prepare the Fe-based $Fe_{50}Cr_{24}Mo_{21}Si_2B_3$ alloy powder. The effect of flow rate of atomizing gas on the median powder diameter was studied. The results show that the powder size decreased with increasing the flow rate of atomizing gas. Fe-based alloy coatings with amorphous phase fraction was then prepared by high velocity oxygen fuel spraying (HVOF) of gas atomized $Fe_{50}Cr_{24}Mo_{21}Si_2B_3$ powder. Microstructural studies show that the coatings present dense layered structure and low porosity of 0.17% in about $200{\mu}m$ thickness. The Fe-based alloy coating exhibits an average hardness of about 1230 HV. Our results show that the HVOF process results in dense and well-bonded coatings, making it attractive for protective coatings applications.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Economic Affairs of Taiwan

참고문헌

  1. Chau, J.L.H., Hou, Y.Y., Pan, A.I.T. and Yang, C.C. (2017), "Fabrication of high hardness and corrosion resistance coatings from Fe-based alloy powders", Particul. Sci. Technol.: Int. J., 35(2), 209-213. https://doi.org/10.1080/02726351.2016.1150369
  2. Chen, M. (2011), "A brief overview of bulk metallic glasses", NPG Asia Materials, 3(9), 82-90. https://doi.org/10.1038/asiamat.2011.30
  3. Fauchais, P.L., Heberlein, J.V.R. and Boulos, M. (2014), Thermal Spray Fundamentals: From Powder to Part, Springer, New York, NY, USA.
  4. Grgac, P., Behulova, M., Moravcik, R. and Mesarosova, J. (2012), "Semi-quantitative model of the microstructure development in the high-alloyed iron based alloy during atomization", Mater. Res., 15(5), 705-712. https://doi.org/10.1590/S1516-14392012005000055
  5. Guo, R.Q., Zhang, C., Chen, Q., Yang, Y., Li, N. and Liu, L. (2011), "Study of structure and corrosion resistance of Fe-based amorphous coatings prepared by HVAF and HVOF", Corrosion Science, 53(7), 2351-2356. https://doi.org/10.1016/j.corsci.2010.12.022
  6. Inoue, A. and Takeuchi, A. (2011), "Recent development and application products of bulk glassy alloys", Acta Materialia, 59(6), 2243-2267. https://doi.org/10.1016/j.actamat.2010.11.027
  7. Kobayashi, A., Yano, S., Kimura, H. and Inoue, A. (2008), "Mechanical property of Fe-base metallic glass coating formed by gas tunnel type plasma spraying", Surf. Coat. Technol., 202(12), 2513-2518. https://doi.org/10.1016/j.surfcoat.2007.09.011
  8. Liu, Z.Q., Zheng, Y.G., Chang, X.C., Hou, W.L., Wang, J.Q., Tang, Z. and Burgess, A. (2009), "Microstructure and properties of Fe-based amorphous metallic coating produced by high velocity axial plasma spraying", J. Alloys Compounds, 484(1-2), 300-307. https://doi.org/10.1016/j.jallcom.2009.04.086
  9. Ni, H.S., Liu, X.H., Chang, X.C., Hou, W.L., Liu, W. and Wang, J.Q. (2009), "High performance amorphous steel coating prepared by HVOF thermal spraying", J. Alloys Compounds, 467, 163-167. https://doi.org/10.1016/j.jallcom.2007.11.133
  10. Nishiyama, N., Amiya, K. and Inoue, A. (2004), "Bulk metallic glasses for industrial products", Mater. Transact., 45(4), 1245-1250. https://doi.org/10.2320/matertrans.45.1245
  11. Pei, H.J., Lee, C.J., Du, X.H., Chang, Y.C. and Huang, J.C. (2011), "Tension behavior of metallic glass coating on Cu foil", Mater. Sci. Eng. A, 528(24), 7317-7322. https://doi.org/10.1016/j.msea.2011.06.022
  12. Srivastava, R.M., Eckert, J., Loser, W., Dhindaw, B.K. and Schultz, L. (2002), "Cooling rate evaluation for bulk amorphous alloys from eutectic microstructures in casting processes", Mater. Transact., 43(7), 1670-1675. https://doi.org/10.2320/matertrans.43.1670
  13. Suryanarayana, C. and Inoue, A. (2013), "Iron-based bulk metallic glasses", Int. Mater. Rev., 58(3), 131-166. https://doi.org/10.1179/1743280412Y.0000000007