某机组锅炉末级过热器出口管段性能研究  

Study on the Performance of Steel Tubes of the Last-stage Superheater of a Boiler

作　　者：李建宾 陈国喜 王霄鑫 胡源 袁保合[2] Li Jianbin;Chen Guoxi;Wang Xiaoxin;Hu Yuan;Yuan Baohe(Henan Boiler and Pressure Vessel Inspection Technology Research Institute,Zhengzhou 450016;North China University of Water Resources and Electric Power,Zhengzhou 450046)

机构地区：[1]河南省锅炉压力容器检验技术科学研究院,郑州450016 [2]华北水利水电大学,郑州450046

出　　处：《中国特种设备安全》2024年第10期77-81,共5页China Special Equipment Safety

摘　　要：为分析某锅炉过热器出口段管子性能,通过金相检验、SEM分析、硬度检验、室温拉伸试验、高温拉伸试验、现场内壁氧化层厚度检测等,对该过热器管子进行了材质老化损伤评估,并使用L-M参数法对其剩余蠕变寿命进行了计算。结果表明:该过热器管内、外壁氧化层厚度最大分别达609.76μm和330.29μm,金相组织珠光体球化5级,但未见明显蠕变损伤,布氏硬度、常温和高温拉伸性能仍符合相关标准的要求,考虑氧化层持续生长,下个运行周期结束时其剩余寿命为48820h。In order to analyze the performance of the tube in the outlet section of a boiler superheater,the material aging damage of the superheater tube was evaluated by metallographic examination,SEM analysis,hardness test,room temperature,high-temperature tensile test,on-site inner wall oxide layer thickness detection,etc.,and the remaining creep life of the superheater tube was calculated by using the L-M parameter method.The results show that the maximum thickness of the oxide layer in the inner and outer walls of the superheater tube is 609.76μm and 330.29μm respectively,and pearlite spheroidization reaches level 5,but there is no obvious creep damage,Brinell hardness,normal temperature and high temperature tensile properties still meet the requirements of relevant standards,and considering the continuous growth of the oxide layer,its remaining life is 48820 h at the end of the next operation cycle.

关 键 词：硬度 显微组织 力学性能 剩余寿命 

分 类 号：X933.2[环境科学与工程—安全科学]