Cavitation Erosion Behavior of the Steel 17CrNiMo6

摘要

In hydraulic drive systems, cavitation erosion affects especially the driving and distribution elements. In mostcases the working fluid is oil for which the cavitation erosion potential is smaller than for water. On the other hand, theerosion affects exactly the areas destined to stop the leakage and as a consequence the reduction of erosion is animportant condition. The majority of the mobile elements being manufactured from weakly alloyed steels it is importantto use suitable heat treatments such as carburizing or nitrating for increasing the hardness of the areas exposed toerosion. The article presents the cavitation erosion resistance researches realized with the vibratory device of theTimisoara Polytechnic University Cavitation Laboratory upon specimens of 17CrNiMo6 steel in two conditionsannealed and carburized in a gaseous environment followed by quenching as well as tempering at low temperature. Thecavitation erosion resistance of the two states for the analyzed steel was compared with the steel 41Cr4 considered withgood cavitation resistance. The eroded area was also examined with performing microscopes. The comparisons showthat the carburizing and the applied heat treatments enhance significantly the steel behavior to erosion.