中国电机工程学报2025，Vol.45Issue(10)：3912-3923,中插19,13.DOI:10.13334/j.0258-8013.pcsee.240126
长期服役T91铁素体耐热钢变负荷工况下蒸汽氧化行为研究
Research on Steam Oxidation Behavior of T91 Ferritic Heat-resistant Steel After Long-term Service Under Variable Load Conditions of the Boiler
摘要
Abstract
To investigate the spallation of oxide scales on ferritic heat-resistant steel T91 under cyclic loading conditions,this study examines the steam oxidation behavior of both long-term serviced and as-received T91 steel samples from boiler applications.The mass changes of the heat-resistant steel before and after oxidation are measured using an analytical balance.The morphology and composition of the oxide products are characterized using scanning electron microscopy and X-ray diffraction.Comparative experimental results demonstrate that the weight gain of the supplied state T91 is greater than that of the long-term serviced T91 under both stable and variable load conditions at 600℃ and 625℃.Compared to stable loading,the variation in atmosphere is caused by load variation resulted in a sudden change in stress on the oxide film of the ferritic heat-resistant steel T91,leading to severe cracking of the oxide film.The long-term serviced samples experience more severe scale peeling due to the presence of numerous voids and structural defects.Boiler operation under load variation can result in the peeling of the oxide film and increase the risk of tube blockage in pressure-bearing components.关键词
T91耐热钢/长时服役/变负荷工况/蒸汽氧化Key words
T91 heat-resistant steel/long-term service/variable load conditions/steam oxidation分类
矿业与冶金引用本文复制引用
陈彦泽,梁志远,徐一鸣,赵钦新..长期服役T91铁素体耐热钢变负荷工况下蒸汽氧化行为研究[J].中国电机工程学报,2025,45(10):3912-3923,中插19,13.基金项目
国家重点研发计划项目(2021YFC3001801).National Key R&D Program of China(2021YFC3001801). （2021YFC3001801）
