용융 알루미늄 도금된 절탄기 강재 튜브의 고상입자 침식 특성
Solid Particle Erosion Properties of Hot-Dip Aluminized Economizer Steel Tube
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In this paper, durability evaluation and surface damage mechanism were investigated through solid particleerosion (SPE) test after applying hot-dip aluminizing (HDA) technology for the purpose of maintenanceof marine economizer tube. Damaged surface shape was analyzed using SEM and 3D microscope. Compositional changes and microstructure of the HDA layer were analyzed through EDS and XRD. Durabilitywas evaluated by analyzing weight loss and surface damage depth after SPE. HDA was confirmed tohave a two-layer structure of Al and Al5Fe2. HDA+HT was made into a single alloy layer of Al5Fe2 by diffusiontreatment. In the microstructure of HDA+HT, void and crack defect were induced during the crystal phasetransformation process. The SPE damage mechanism depends on material properties. Plastic deformationoccurred in the substrate and HDA due to ductility, whereas weight loss due to brittleness occurred significantlyin HDA+HT. As a result, the substrate and HDA showed better SPE resistance than HDA+HT.
Abstract
In this paper, durability evaluation and surface damage mechanism were investigated through solid particleerosion (SPE) test after applying hot-dip aluminizing (HDA) technology for the purpose of maintenanceof marine economizer tube. Damaged surface shape was analyzed using SEM and 3D microscope. Compositional changes and microstructure of the HDA layer were analyzed through EDS and XRD. Durabilitywas evaluated by analyzing weight loss and surface damage depth after SPE. HDA was confirmed tohave a two-layer structure of Al and Al5Fe2. HDA+HT was made into a single alloy layer of Al5Fe2 by diffusiontreatment. In the microstructure of HDA+HT, void and crack defect were induced during the crystal phasetransformation process. The SPE damage mechanism depends on material properties. Plastic deformationoccurred in the substrate and HDA due to ductility, whereas weight loss due to brittleness occurred significantlyin HDA+HT. As a result, the substrate and HDA showed better SPE resistance than HDA+HT.
참고문헌 (12)
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