The effect of the gas-nitriding thermochemical treatment on the cavitation erosion resistance of a Cr-Ni-Mo alloy is analyzed using a piezoceramic vibrating equipment and following the ASTM G32-2010 standard. The evaluation of the cavitation erosion behavior was made based on the analysis of the mean depth of erosion (MDE) and mean depth of erosion rate (MDER), for samples subjected to the cavitation erosion for different times. The surface topography and the structural changes in the marginal layer were analyzed through optical and scanning electron microscopy. Following nitriding the cavitation erosion resistance was about 9.6 times higher compared to the annealed state and about 8.2 times higher compared to the hardened and tempered state.
Assessment of Cavitation Erosion of Gas-Nitrided Cr-Ni-Mo Steels
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received January 29, 2017; final manuscript received December 21, 2017; published online May 21, 2018. Assoc. Editor: Dae-Eun Kim.
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Mitelea, I., Ghera, C., Bordeaşu, I., and Crăciunescu, C. (May 21, 2018). "Assessment of Cavitation Erosion of Gas-Nitrided Cr-Ni-Mo Steels." ASME. J. Tribol. November 2018; 140(6): 061601. https://doi.org/10.1115/1.4039133
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