Abstract
Hydraulic machinery components made of grey cast iron (FG 260 grade) are preferred for engineering application because of their excellent damping properties. However when such materials are exposed to mining environments they exhibit poor erosion resistance without meeting their estimated life time. In order to enhance the service life of the material of hydraulic components, WC–Co–Cr thermal spray coating was identified. Grey cast iron samples (FG 260 grade) with and without WC–Co–Cr coating were subjected to slurry jet erosion tests by varying the impingent velocity and angle under two different pH levels at 3 and 7 which pertain to the mining environment. XRD characterization was done to identify and confirm the carbide phases present. Surface morphology studies were carried by SEM on both the substrate and coating, which revealed the erosion of grey cast iron surface, due to ploughing mechanism. In the case of WC–Co–Cr coating, at oblique angle of impact, the degradation is by micro cutting of the matrix and ploughing mechanism. At normal impingement, the fluctuating stress creates the cracks, which interlink each other and thereby causing erosion of the material.
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References
Kumarasamy M, Natarajan S, Kumaresh Babu S P, Santhanam S, Veerabalu S, and Chokkuvel Murugan S, Mater Sci Forum 710 (2012) 689.
Murthy J K N, and Venkataraman B, Surf Coat Technol 200 (2006) 2642.
Barbezat G, Nicoll A R, and Sickinger A, Wear 162–164 (1993) 529.
Karimi A, and Verdon C, Surf Coat Technol 57 (1993) 81.
Yang Q, Senda T, and Ohmor A, Wear 254 (2003) 23.
Lee C W, Han J H, Yoon J, Shin M C, and Kwun S I, Surf Coat Technol 204 (2010) 2223.
Zhao L, Maurer M, Fischer F, Dicks R, and Lugscheider E, Wear 257 (2003) 41.
Toma D, Brandl W, and Marginean G, Surf Coat Technol 138 (2001) 149.
Hadad M, Hitzek R, Buergler P, Rohr L, and Siegmann S, Wear 263 (2007) 691.
Duraiselvam M, Galun R, Siegmann S, Wesling V, and Mordike B L, Wear 261 (2006) 1140.
Kumarasamy M, Natarajan S, Kumaresh Babu S P, Santhanam S, Veerabalu S, and Chokkuvel Murugan S, in Proceedings of Surface Modification Technologies XXVI, (eds) Sudarshan T S, Jeandin M, and Firdirici V (2012) (under print).
Scrivani A, Ianelli S, Rossi A, Groppetti R, Casadei F, and Rizzi G, Wear 250 (2001) 107.
Magnani M, Suegama P H, Espallargas N, Dosta S, Fugivara C S, and Guilemany J M, Surf Coat Technol 202 (2008) 4746.
Wu Y, Hong S, Zhang J, He Z, Guo W, Wang Q, and Li G, Int J Refract Metals Hard Mater 32 (2012) 21.
Stack M M, Chacon-Nava J, and Stott F H, Wear 180 (1995) 91.
Shivamurthy R C, Kamaraj M, Nagarajan R, Shariff S M, and Padmanabham G, Wear 267 (2009) 204.
Mellor B G, Surface Coatings for Protection against Wear, Woodhead Publishing Limited, Cambridge (2006) p 28.
Grewal H S, Bhandari S, and Singh H, Metall Mater Trans A 43A (2012) 3387.
Finnie I, Wear 3 (1960) 87.
Wood R J K, Int J Refract Metals Hard Mater 28 (2010) 82.
Barber J, Mellor B G, and Wood R J K, Wear 259 (2005) 125.
Wood R J K, Mellor B G, and Binfield M L, Wear 211 (1997) 70.
Yıldızlı K, Karamıs M B, and Nair F, Wear 261 (2006) 622.
Acknowledgments
The authors wish to thank the management of National Institute of Technology, Tiruchirappalli, India for having provided all the necessary facilities to carry out this work. The financial support for this work received from Neyveli Lignite Corporation Limited, Neyveli, India is gratefully acknowledged.
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Yoganandh, J., Natarajan, S. & Kumaresh Babu, S.P. Erosion Behaviour of WC–Co–Cr Thermal Spray Coated Grey Cast Iron under Mining Environment. Trans Indian Inst Met 66, 437–443 (2013). https://doi.org/10.1007/s12666-013-0262-x
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DOI: https://doi.org/10.1007/s12666-013-0262-x