| Citation: | WANG Z J，YAO J，XIONG J Z，et al. Experimental research on erosion of Q345 steel under two-phase flow condition[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（4）：891-899 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0357
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Erosion is a common occurrence in the civic, industrial, military, and other sectors, and it frequently results in equipment being struck by particles and suffering varied degrees of damage. This paper selects Q345 steel to carry out the erosion experiment under the liquid-solid two-phase flow condition. Based on the weight loss method and surface analysis technology, the effect of particle size, particle concentration, erosion angle (15°-90°), erosion time and other factors on erosion were studied. And the morphological characteristics of the surface of the sample after the erosion were partitioned. The experimental results show that as the particle mass concentration increases, the rate of erosion weight loss gradually tends to be flat. 3D morphological observation found that after the concentration was higher than 0.01%, all of the material surface was eroded, and the maximum erosion depth was reduced. Q345 steel has the largest mass loss near the 30° attack angle, which is related to its strong toughness and plasticity. Based on the analysis of metallographic microscopy, the sample surface is divided into three zones after the 90° jet impact. The 2 zones near the outer edge of the nozzle have the largest number of pits and furrows and the most serious damage, which is related to the characteristics of the jet flow field and particle distribution.
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