Abstract
For much industry equipment, such as the fluid machines, high velocity water often carries significant amount of sands, causing serious erosion of the parts and the decrease of the system efficiency. The current study uses abrasive particle erosion model and experiment to analyze the erosion of SUS410 and SUS304. The correlation between the erosion time, velocity, attack angel, abrasive mass fraction, abrasive properties (diameter, hardness, shape) and the material erosion rate and the maximum erosion depth will be investigated, including the comparison between the two tested materials and the analysis of dimensional analysis. The result of the experiment demonstrates that the erosion mechanism of SUS410 and SUS304 is ductile mode, where the material is eroded by microcutting, extrusion and forging that cause large plastic deformation. SUS410 has the better erosion resistance due to its higher yield strength. Both erosion rates of the two materials are mainly affected by impacting velocity and attack angel. The accumulative weight loss is about proportional to the abrasive mass flow rate. The maximum erosion rate occurs at the attack angel between 30 and 45 degree. The dimensional analysis shows the erosion rate is proportional to the power of 2.0 of the velocity as the attack angel is below the critical value, while it is proportional to the power of 2.25 as the attack angel is above the critical value. In addition, lager abrasive diameter, lager abrasive density, higher abrasive mass flow, lower material hardness and smaller jet diameter increase the erosion rate. The maximum erosion depth increases with increasing attack angel until it reaches a maximum, and decreases slowly with increasing attack angel further. Higher velocity results in lager depth of erosion.