Кавітаційно-стійкі сталі для передвключених коліс перших ступенів відцентрових насосів

This article deals with the problem of cavitation damage of hydraulic parts of centrifugal pumps. It is known that cavitation erosion can occur when the stage of fully-developed cavitation is reached, which results to failure of hydraulic parts. Based on many years of experience in combating the negative effects of cavitation erosion, specialists of JSC VNIIAEN have concluded that the most effective way to increase the cavitation performance of centrifugal pump hydraulic parts is to use an inducer upstream of the first stage impeller. Based on this, the properties of cavitation-resistant steels were studied for inducers fitted upstream of the first stage impellers of centrifugal pumps, which, operating under fully-developed cavitation, are most susceptible to cavitation wear. The article presents the results of study carried out on bench-scale test stand and the interrelation of chemical and mechanical properties of steels resistant to cavitation.