キャビテーション壊食とスラリ－摩耗の複合損傷に及ぼすスラリー濃度の影響

概要

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Simultaneous damage of cavitation erosion and slurry wear of SUS 304 was studied by using a test apparatus with the combination of an ultrasonic vibratory cavitation device and a slurry jet device. The tests were canied out in slurry having concentrations from 0 mass percent to 6 mass percent. The slurry was made of tap water and silica sand. Volume loss rate first kept constant irrespective of concentration and then began to increase remarkably at a certain concentration. Thus, a critical concentration was found beyond which silica sand has an effect on slurry wear. Moreover, the volume loss rate of the simultaneous damage is higher than that of slurry wear without cavitation at concentrations exceeding the critical concentration. The acceleration ratio of volume loss rate (simultaneous damage/slurry wear) is as much as 2.4, when the flowing velocity is low (5 m/s) and the slurry is low near the critical concentration.
社団法人　日本機械学会の論文
2001-05-25