Lavinia Mădălina MICU


32-41 STUDIUL EROZIUNII OȚELULUI USt 37-2 PRIN CAVITAȚIE VIBRATOARE

Erosion study of the Steel UST 37-2

by vibratory cavitation

 

The paper presents the results of the experiment cavitation vibrators, carried on carbon steel for general use UST 37-2, used in the manufacture of hydraulic turbine components, along the route of water flow into the turbine. Testing is performed on standard crystal vibrator device piezo ceramic of the Cavitation Laboratory of the University Politehnica Timisoara. OH12NDL comparison with standard steel and grey iron with pearlite structure shows that steel has low resistance to cavitation generated by the vibrator device, therefore not recommended in the manufacture of parts in areas of developed cavitation.                    Keywords: erosion, cavitation, carbon steel, average depth of erosion, erosion rate, vibrator device                   Cuvinte cheie: eroziune, cavitație, oțel carbon, adâncime medie de eroziune, viteza de eroziune, aparat vibrator

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26-56 CERCETAREA EROZIUNII CAVITAŢIONALE ASUPRA OŢELULUI INOXIDABIL X2CrNiMn22+5+3 TRATAT TERMIC

THE RESEARCH OF EROSION CAVITATION ON STAINLESS STEEL X2CRNIMON22+5+3 HEAT- TREATED
In this paper is presented a comparative analysis between cavitation resistance of stainless steel austenito-feritic and OH12NDL stainless steel (traditional steel). To assess the damage produced by Cecil cavitaţionale implosion over stainless steel duplex X2CrNiMn22 + 5 + 3 tests have been carried out in the laboratory of Cavitation at the University Politehnica Timisoara. The assessment of the data and the interpretation of the characteristic curves of cavitation (loss of mass and speed of erosion) could find that stainless steel X2CrNiMn22 + 5 + 3 heat-treated by quenching followed by tempering the high cavitation resistance exhibited a higher compared with traditional steel OH12NDL.

Keywords: stainless steel, cavitationala erosion, characteristic curves, mass loss, resistance to cavitation

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