Abstract
AbstractIn order to simulate and predict the erosion damage suffered by in‐bed tubes in fluidised bed combustors, dedicated test equipment was set up at CISE's tribology laboratory with ENEL S. p. A (Italian National Electricity Board) support. This erosion rig was used to test and characterise the behaviour of AISI 310, P9, and P22 steels, candidate materials for this type of heat‐exchanger tube. Tests were carried out at room temperature to characterise the erosion behaviour of these materials and at higher specimen (350°C and 500°C) and air (840°C) temperatures to simulate and characterise their behaviour in service. From this experimental work it turned out that, while at room temperature, the erosion behaviour of the three materials did not differ significantly, at high temperature P9 showed the best resistance in both test conditions and AISI 310 displayed an optimum behaviour at normal impact angles, but had the higher erosion rate at 30° impact angle.
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