Researches upon the cavitation erosion behaviour of austenite steels

International Conference on Applied Sciences 2015

Bordeasu, I.^1 ; Popoviciu, M.O.^2 ; Mitelea, I.^1 ; Salcianu, L.C.^1 ; Bordeasu, D.^1 ; Duma, S.T.^1 ; Iosif, A.^3

Politehnica University of Timisoara, Faculty of Mechanical Engineering, Mihai Viteazul Street, Nr. 1, Timisoara

300222, Romania^1

Academy of Romanian Scientists, Mihai Viteazul Street, Nr. 1, Timisoara

300222, Romania^2

Politehnica University of Timisoara, Faculty of Civil Engineering, Traian Lalescu Street, Nr. 2, Timisoara

300223, Romania^3

关键词: Austenite steels;    Austenitic structure;    Cavitation erosion resistance;    Characteristic curve;    Chemical component;    Chemical compositions;    Optical microscopes;    Structural component;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/106/1/012001/pdf
DOI  :  10.1088/1757-899X/106/1/012001

来源: IOP

【 摘 要 】

Paper analyzes the cavitation erosion behavior of two stainless steels with 100% austenitic structure but differing by the chemical composition and the values of mechanical properties. The research is based on the MDE(t) and MDER(t) characteristic curves. We studied supplementary the aspect of the eroded areas by other to different means: observations with performing optical microscopes and roughness measurements. The tests were done in the T2 vibratory facility in the Cavitation Laboratory of the Timisoara Polytechnic University. The principal purpose of the study is the identification of the elements influencing significantly the cavitation erosion resistance. It was established the effect of the principal chemical components (determining the proportion of the structural components in conformity the Schaffler diagram) upon the cavitation erosion resistance. The results of the researches present the influence of the proportion of unstable austenite upon cavitation erosion resistance. The stainless steel with the great proportion of unstable austenite has the best behavior. The obtained conclusion are important for the metallurgists which realizes the stainless steels used for manufacturing the runners of hydraulic machineries (turbines and pumps) with increased resistance to cavitation attack.