Ionel BACIU


19-62 CONSIDERAŢII PRIVIND AVARIILE PRODUSE LA ARBORII TURBINELOR BULB DE LA PORŢILE DE FIER II

CONSIDERETIONS CONCERNING THE DAMAGES
CREATED ON BULB TURBINES IRON GATES II
The paper presents the damages observed, after an important time of
running, on the shafts of hydraulic bulb turbines. The damages have taken the
form of multiple cracks, generated through fatigue stresses.
Keywords: application to fatigue, hydraulic tubine bulb, cracking, corrosion
Cuvinte cheie: solicitare de oboseală, tubine hidraulice bulb, fisuri,
coroziune

62 CONSIDERAŢII PRIVIND AVARIILE PRODUSE LA


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