超超临界锅炉管用T92/P92钢研究进展

摘要

T92/P92 steel,which possesses excellent high temperature combination properties,has became the mainly candidate alloys for Ultra Supercritical Plants ( USC). In this paper, research developments of the P92 steel around the world are reviewed, including the microstructure, evaluation of precipitates during aging or creep exposure, strengthening mechanisms, creep life prediction and causes of breakdown of creep strength. Its study direction in the future is also looked ahead.%T92/P92钢凭借优异的综合性能,现已成为超超临界机组锅炉主蒸汽管道的主要用钢.综述了近期国内外学者对T92/P92钢的研究概况,重点总结了材料的原始组织状态、蠕变或时效过程中的相变过程、材料强化机理、蠕变寿命预测及长时蠕变强度过早降低的原因,并对今后该领域的一些研究工作进行了展望.