Communications - Scientific Letters of the University of Zilina 2018, 20(3):48-54 | DOI: 10.26552/com.C.2018.3.48-54

Influence of Surface Roughness on the Cavitation Wear of P265GH and X2CrNi18-9 Steel Cavitation Generators

Tomasz Linek1, Tomasz Tanski2, Wojciech Borek2
1 Odlewnie Polskie S.A, Starachowice, Poland and Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Gliwice, Poland
2 Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Gliwice, Poland

The aim of this paper was to determine the effect of surface roughness of cavitation generators made from two different materials: P265GH steel, with a ferritic-pearlitic structure, and X2CrNi18-9 (304L) steel with an austenitic structure on the mass loss and cavitation wear. Cavitation generators were tested in the conditions of cavitation wear environment continuously for 500 PMHs in a specially designed and constructed author's stream and flow device. Based on the carried out experiments was confirmed that the highest mass loss - 0.1752 g is seen for a sample of P265GH steel wet sanded with paper with the grain size of 1000. The smallest mass loss was recorded for the cavitation generator made of X2CrNi18-9 (304L) steel, sanded with sandpaper with the grain size of 2500. Certainly, the smallest number of cavitation wear effects was found for a cavitation generator made of austenitic steel X2CrNi18-9 (304L). Few places were identified based on macroscopic photographs, especially near the edges of the straight-through openings, but their number was much smaller than for the ferritic-pearlitic steel, which is associated most of all with the properties of austenitic chromium - nickel steel.

Keywords: cavitation; cavitation wear; cavitation generators; surface roughness; mass loss; P265GH steel; X2CrNi18-9 (304L) steel

Received: March 15, 2018; Accepted: June 26, 2018; Published: September 30, 2018  Show citation

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Linek, T., Tanski, T., & Borek, W. (2018). Influence of Surface Roughness on the Cavitation Wear of P265GH and X2CrNi18-9 Steel Cavitation Generators. Communications - Scientific Letters of the University of Zilina, 20(3), 48-54. doi: 10.26552/com.C.2018.3.48-54
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