流化床埋管的冷态冲击磨损实验研究

THE EXPERIMENTAL STUDY OF LOW VELOCITY IMPACT EROSION IN FLUIDIZED BEDS

讨论了自由降落法对黄铜、碳钢、不锈钢等１１种材料试样的冷态冲击磨损实验结果，颗粒对试样冲击速度控制在２．２～５．０ｍ／ｓ范围内，大致与实际流化床内固体颗粒对埋管的冲击速度相当，并对试样磨损率与颗粒冲击速度、角度、球形度及平均直径进行了回归，建立了低速冲击磨损经验公式，利用电子显微镜对被磨损试样表面进行了观察，探讨了低速度冲击磨损机理。

Particles were dropped onto taget specimens made of 11 different materials,The impactvelocity were in the range of 2.2～5.0m/s, Erosion rates were correlated as a function ofimpact velocity,angle and particle properties, According to the analysis of micrographiestaken by scanning electron microscope, the mechanism of low velocity impact erosion ontubes in fluidized beds was discussed。