Dumitru ALEXESCU


17-26 PERFORMANłĂ SAU REGRESUL STUDENTULUI DIN LICEU SPRE FACULTATE

LA PEROFORMANCE OU LA REGRESS DU STUDENT
DE LYCÉE JUSQU’À LA FACULTÉ
L’ouvrage présent des aspects de la formation de la jeunesse
génération, qui parcours les courses du lycée et l’universitaire dans la
formation professionnelle. Sont présentées des aspects qui, à cause des
transformations du system éducationnelle roumaine, conduisent à une quelque
forme de manifestation d’absolvent d’université.
Cuvinte cheie: elev, student, profesor, educaŃie

26 PERFORMANłĂ SAU REGRESUL


20-58 STUDIUL REZISTENŢEI LA CAVITAŢIE A OŢELULUI INOXIDABIL MARTENSITIC CU 12 % CROM DESTINAT FABRICĂRII PALETELOR DE MAŞINI HIDRAULICE

STUDY OF RESISTANCE TO CAVITATION TO MARTENSITIC
STAINLESS STEEL WITH 12 % CHROM USED IN
MANUFACTURING HYDRAULIC MACHINERY BLADES
Paper analyses the cavitations erosion for stainless steel with 12 %
chromium and 6 % nickel content. The experimental researches were
undertaken in the Cavitations Laboratory of the Timişoara Polytechnic
University using a vibratory facility respecting the conditions of the ASTM G32-
2006 Standard.
The steel behaviour was evaluated both on the ground of
microstructure erosion (through optic and electronic microscopy) and by
comparisons with other reference steel, with 18 % chrome and 10 % nickel,
which was use in Romania and other countries for manufacturing turbine
blades.
Keywords: cavitation erosion, microstructure, maximum depth of
erosion, stainless steel, chemicals
Cuvinte cheie: eroziunea cavitaţiei, microstructură, adâncimea
maximă a eroziunii, oțel inoxidabil, elemente chimice

58 STUDIUL REZISTENŢEI LA CAVITAŢIE A OŢELULUI