摘要
对某电厂服役一年的马氏体耐热钢叶片表面的氧化情况进行研究。结果表明,在530~580℃的服役温度下,1-4级叶片表面内层氧化物均为铁铬尖晶石,外层为富铁氧化物,铁铬尖晶石中的Cr元素分布不均匀,蒸汽流速导致不同级叶片外层富铁氧化物在成分和结构上存在差异;金属离子向外扩散是氧化速率的限速步骤,同时也是导致氧化层中产生孔洞的主要原因,因为温度升高可促进金属离子向外扩散。
The oxidation was studied of martensiteheat resistant steel blade surface in a power plant.The results show that the inner oxide is iron chromium spinel and the outer layer is iron oxide on the surface of stage 1-4 blades at the service temperature of 530-580℃.The Cr element in iron chromium spinel is unevenly distributed.The steam flow rate leads to the differences in the composition and structure of iron rich oxides in the outer layer of different stages of blades;the outward diffusion of metal ions is the speed limiting step of oxidation rate,and it is also the main reason for the formation of holes in the oxide layer.Because the increase of temperature can promote the outward diffusion of metal ions.
作者
李金祺
陈艺文
裴玉冰
王天剑
聂丽萍
LI Jinqi;CHENG Yiwen;PEI Yubing;WANG Tianjian;NIE Liping(State Key Laboratory of Laboratory of Long-life High Temperature Materials,Deyang 618000,China;Dongfang Electric Corporation Dongfang Turbinr Co.,Ltd.,Deyang 618000,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2021年第S02期395-398,共4页
Materials Reports
基金
德阳市开放式校市合作技术研发计划项目(2018CKJ001)。
关键词
钢
水蒸气
氧化
steel
steam
oxidation
