对某烯烃厂爆裂破坏的蒸汽锅炉（F106）炉管，进行了宏观形貌、化学、金相、扫描电镜的分析.结果表明：炉管爆裂的原因是由于炉内爆管处局部温度过高（超温），并在该温度下长期运行，管壁发生了高温蠕变，晶界出现蠕变裂纹，使得炉管强度降低所致.
The burst of tubes for steam boiler（F106）in an alkene factory was examined. According to visual examination，chemical analysis,metallography and SEM examination,it was found that the burst of the tubes was mainly caused by long-time overheatng of the tubes at high temperatures,resulting in high-temperature creep.Many creep cavities and microcracks were observed on the grain boundaries of the tube steel.The strength of tubes was decreased due to high-temperature creep which then induced the burst.
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