24-61 COMPORTAREA ȘI REZISTENȚA LA CAVITAȚIE A DOUĂ OȚELURI INOXIDABILE CU STRUCTURI BIFAZICE DE AUSTENITĂ ȘI MARTENSITĂ
THE INFLUENCE OF THE TYPE AND FONCTIONAL
PARAMETERS OF THE VIBRATOR APPARAT UPON THE
EVOLUTION CAVITATION EROSION
This paper analyses the behaviour and resistance to cavitation for two
stainless steels with biphasic structures of austenite and martensite, in different
proportions.
The two steels have the similar content of nickel, but different
chromium and carbon. Degradation of the investigated surface is accomplished
by vibratory cavitation, produced in the piezoceramic crystal device T2, located
in Cavitation Laboratory, University Polytechnic Timisoara.
The research results are presented in the form of penetration speeds
erosion, the experimental points and the approximation analytical curves, as
well as the photos for the profile breakings, in a given section The conclusions
show that the steel, with higher carbon content and lower of the chrome, has a
superior strength and the behaviour of the lower carbon content and higher
chromium, although, the latter has a higher proportion of the martensite,
constituent considered with the highest resistance to cavitation.
Cuvinte cheie: eroziunea de cavitaţie, oţel inoxidabil, microstructură,
compoziţie chimică
Keywords: erosion of the cavitation, stainless steel, microstructure,
chemical composition