油轮辅锅炉过热器爆管的原因
Burst Causes for Superheater Tube of a Tank Auxiliary Boiler
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摘要: 对某油轮爆裂的辅锅炉过热器管进行了成分分析、力学性能测试和显微组织观察, 以找出其爆管的原因。结果表明: 因锅炉长期超温运行, 致使钢管基体组织珠光体球化、并产生严重的蠕变损伤; 管内壁存在的结垢层加剧了过热器管的过热并促进其爆裂。Abstract: The chemical composition analysis, mechanical properties testing and microstructure observing were done for a burst superheater tube in a tank auxiliary boiler to find burst causes. The results show that pearlite spheroidization and serious creep damage happened in the tube matrix due to a long time superheating, and the deposit on inner-wall of the superheater tube made superheat aggravate and promote burst.