一种乙烯裂解炉管高温损伤评估的新方法  

A New Method for High Temperature Damage Assessment on the Ethylene Cracking Furnace Tube

作　　者：徐秀清 吕运容 尹成先 李伟明 XU Xiuqing;LYU Yunrong;YIN Chengxian;LI Weiming(CNPC Tubular Goods Research Institute,Xi′an 710077,China;State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials,Xi′an 710077,China;Guangdong Provincial Key Lab of Petrochemical Equipment Fault Diagnosis,Maoming,Guangdong 525000,China;Guangdong Institute of Petrochemical Technology,Maoming,Guangdong 525000,China)

机构地区：[1]石油管工程技术研究院,西安710077 [2]石油管材及装备材料服役行为与结构安全国家重点实验室,西安710077 [3]广东省石化装备故障诊断重点实验室,广东茂名525000 [4]广东石油化工学院,广东茂名525000

出　　处：《机电工程技术》2020年第6期10-13,47,共5页Mechanical & Electrical Engineering Technology

基　　金：国家重点研发计划资助项目(编号:2017YFF0210406)。

摘　　要：渗碳和蠕变是引发乙烯裂解炉管失效的最主要损伤机理。按照渗碳体形态特征和蠕变孔洞的状态裂解炉管的高温损伤可分为7个阶段,在这7个阶段中,微观上晶内Cr/Ni含量发生明显且持续的变化,这种变化将导致材料的磁特征参数--矫顽力发生变化,主要表现为在高温损伤早期矫顽力曲线呈现U形特征,而材料进入损伤末期阶段则呈现出倒U形曲线,因此可以用矫顽力作为磁特征参数,用于识别乙烯裂解炉管所处的损伤状态,从而评估炉管的损伤状态等级。Carburization and creep are the main damage mechanisms that cause the failure of ethylene cracking furnace tubes.According to the morphological characteristics of cementite and the state of creep holes,the high-temperature damage of the cracking furnace tube can be divided into 7 stages.In these 7 stages,the Cr/Ni content in the microscopic supercrystals has obvious and continuous changes.This change will cause the material′s magnetic characteristic parameter-coercive force to change,mainly showing that the coercive force curve shows a U-shaped characteristic in the early stage of high temperature damage,and the material shows an inverted U-shaped curve at the end of the damage stage,so the coercive force can be used force as a magnetic characteristic parameter is used to identify the damage state of the ethylene cracking furnace tube,so as to evaluate the damage state level of the furnace tube.

关 键 词：渗碳 蠕变 矫顽力 饱和磁化强度 损伤状态评估 

分 类 号：TQ221[化学工程—有机化工]