新旧HP-Nb炉管焊接后的剩余寿命  

RESIDUAL LIFE FOR NEW—OLD HP-Nb FURNACE TUBE AFTER WELDING

作　　者：张忠政[1] 巩建鸣[1] 奚冬兴[2] 朱瑞松[2] 

机构地区：[1]南京工业大学机械与动力工程学院,南京210009 [2]扬子石油化工股份有限公司,南京210048

出　　处：《石油化工设备技术》2005年第4期1-3,共3页Petrochemical Equipment Technology

摘　　要：制氢转化炉炉管局部发生失效后,采用局部更换炉管失效段的方法可以延长整根炉管的使用寿命。采用微观组织分级法、硬度测量法以及Larson-Miller参数法对某厂新旧HP-Nb炉管焊接后的剩余寿命进行综合评价,结果表明新旧炉管焊接后的剩余寿命约为45000h,蠕变断裂将发生在旧炉管的母材上。After the failure occurred at local tube for hydrogen manufacturing furnace,by the use of replacing the failure portion of furnace tube, the service life of whole furnace tube could be prolonged.By means of microstructure grading method,hardness measurement method and Larson—Miller parameter method,the residual life of new—old HP—Nb furnace tube after welding for a certain plant was evaluated com- prehensively.The result denoted that the resid- ual life of new—old tube after melding was about 45000 hours.The fatigue crack would be oc- curred at the base metal of the used furnace tube.

关 键 词：转化炉 炉管 焊接 剩余寿命 炉管焊接 NB HP 炉管失效 局部更换 制氢转化炉 

分 类 号：TE963[石油与天然气工程—石油机械设备] TM621.2[电气工程—电力系统及自动化]