Abstract
Laser cladding of tungsten carbide (WC) on stainless steels 13Cr-4Ni and AISI 304 substrates has been performed using high power diode laser. The cladded stainless steels were characterized for microstructural changes, hardness, solid particle erosion resistance and corrosion behavior. Resistance of the clad to solid particle erosion was evaluated using alumina particles according to ASTM G76 and corrosion behavior was studied by employing the anodic polarization and open circuit potential measurement in 3.5% NaCl solution and tap water. The hardness of laser cladded AISI 304 and 13Cr-4Ni stainless steel was increased up to 815 and 725Hv100 g, respectively. The erosion resistance of the modified surface was improved significantly such that the erosion rate of cladded AISI 304 (at 114 W/mm2) was observed ~0.74 mg/cm2/h as compared to ~1.16 and 0.97 mg/cm2/h for untreated AISI 304 and 13Cr-4Ni, respectively. Laser cladding of both the stainless steels, however, reduced the corrosion resistance in both NaCl and tap water.
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Acknowledgments
The work carried out in this paper is part of a supra institutional project SIP0025. Help rendered by Shri Rajesh Jha in carrying out some laser cladding and erosion experiments is sincerely acknowledged.
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Singh, R., Kumar, M., Kumar, D. et al. Erosion and Corrosion Behavior of Laser Cladded Stainless Steels with Tungsten Carbide. J. of Materi Eng and Perform 21, 2274–2282 (2012). https://doi.org/10.1007/s11665-012-0170-y
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DOI: https://doi.org/10.1007/s11665-012-0170-y