锅炉炉管氧化皮的生成及剥落研究综述

综述了近年来国内外关于电站锅炉炉管氧化皮的研究成果,分析了氧化皮形成的原因、影响因素,以及氧化皮剥落机理、原因、条件和缓解氧化皮失效的方法.阐述了氧化皮生成规律的有限元和试验模拟方法.研究表明,超温加快了氧化皮的生长,Cr,Si,Al的加入增强了合金抗氧化性能,减缓了氧化皮的生成;蒸汽侧氧化膜的脱落与其内的应力状态有直接关系,通过火电厂蒸汽温度控制系统可以缓解氧化膜的失效问题.

Review of Researches on Formation and Exfoliation of the Oxide Scale of Boiler Tubes

The research results on the oxide scales of the boiler tubes in thermal power plants are summarized.Causes of formation of oxide scale and its influence factors and deformation mechanism and influence factors and exfoliation mechanism,the causes and conditions and mitigation methods of oxide scale failure are analyzed in detail.The finite element method and experiments are carried out to study the information and exfoliation of the oxide scale.It is concluded that over temperature increases the growth of oxide skin,and the addition of Cr,Si and Al enhances the oxidation resistance of alloy and slows the formation of oxide skin.The steam side oxide scale has a direct relationship with stress state.The problem of oxide scale failure can be alleviated by the steam temperature control system in thermal power plant.