摘要
为了研究过/再热器管道内壁普遍存在与高温蒸汽反应导致的氧化现象,利用Thermo-Calc相图计算软件对几种钢质管材在不同环境下的氧化产物进行了理论分析。结果表明,对高温蒸汽环境的调控应该与管材材质相关联考虑;耐热钢材质的变化不改变氧化层的宏观结构,但可以改变氧化物组成;从T23、P91到TP347,氧化层中FeCr2O4致密氧化物质量分数增加,其抗氧化性能递增。德国新近研发的HiperFer17Cr5耐热钢,可以在较宽的氧分压范围内形成以FeCr2O4为主的致密氧化层,且通过添加钨、铌兼具更好的高温强度,具有较好的应用前景。
In order to study the oxidation phenomenon caused by the reaction between the inner wall of the superheater/reheater pipe and the high temperature steam,the oxidation products of several steel pipes in different environments were theoretically analyzed by using the phase diagram calculation software of Thermo-Calc.The result shows that the regulation of high temperature steam environment should be related to the pipe material in practice.The change of composition in heat resistant steel does not affect the macrostructure of oxide layer but the composition of oxide.From T23 to P91 to TP347,with the increase of FeCr2O4 in oxide layer,the antioxidant properties increased gradually.The HiperFer17Cr5 heat resistant steel,recently developed in Germany,can form a dense oxide layer dominated by FeCr2O4 in a wide range of oxygen partial pressure.And due to the excellent high-temperature strength by adding W and Nb,the application is promising.
作者
李宸庆
侯雅青
杨丽
闫爱军
潘涛
LI Chen-qing;HOU Ya-qing;YANG Li;YAN Ai-jun;PAN Tao(Institute of Structural Steels,Central Iron and Steel Research Institute,Beijing 100081,China;Technology Division,Beijing MatDao Technology Co.,Ltd.,Beijing 100081,China;Technology Division,Xi′an Thermal Power Research Institute Co.,Ltd.,Xi′an 710054,Shaanxi,China)
出处
《钢铁》
CAS
CSCD
北大核心
2020年第10期83-88,共6页
Iron and Steel
基金
国家自然科学基金资助项目(51701044)。
关键词
CALPHAD
耐热钢
高温蒸汽氧化
过/再热器管
火电站
CALPHAD
heat resistant steel
high temperature steam oxidation
superheater/reheater tube
thermal power station
作者简介
李宸庆(1995-),男,硕士生,E-mail:leecq0322@163.com;通讯作者:潘涛(1978),男,博士,教授,E-mail:taopan@vip.sina.com。
