INFLUENCE OF VOLUME HEAT TREATMENT ON BRONZE RESISTANCE AMPCO M4 TO CAVITATION EROSION.

The first observations of the destructive effects of cavitation have been made on marine propellers. As a result, researchers and shipbuilders requested materials, techniques that treated materials propellers, which confer resistance to cavitation erosion. Such a technique, very well mastered, is the volumetric heat treatment due to the knowledge of all the factors that define it. This paper presents the effect of treatment on behaviour and resistance type CuNiAlFeMn bronze (symbolized AMPCO M4) to cavitation erosion caused by vibrating piezoelectric crystal vibrating device T2 cavity found in the laboratory of U.P Timişoara. The resistance created by the application of this treatment is carried out based on the characteristic curves of erosion MDE (t) and MDER (t), compared with the material condition of the material delivered and CuNiAl III RNR standard, the reference for the ships propellers Romania. Comparison with state material delivered with the standard shows that the treatment you get a large increase in resistance due to increasing hardness of the surface layer exposed to cavitation. [ABSTRACT FROM AUTHOR]