摘要
针对高温服役后奥氏体耐热钢锅炉管出现较高磁性问题,采用磁感应强度测量仪、奥氏体氧化物检测仪、综合物性测量系统(VSM)进行测试,进行热处理实验及显微组织分析,测试分析了TP304H、TP347H、S30432等奥氏体耐热钢新样品、高温服役样品及其碳化物的磁性能(磁当量、磁感应强度、磁化强度、饱和磁化强度、剩磁、矫顽力、磁滞回线等)。结果表明:具有铁磁性的α′-马氏体及其相变体积膨胀引起较高内应力产生的磁性和具有弱铁磁性碳化物产生的磁性共同引起在役奥氏体耐热钢出现较高磁性,其中碳化物引起的磁性可以忽略不计。
High magnetism was found in austenitic heat resistant steel boiler tubes after service at high temperatures.To solve this problem,the magnetic properties(such as magnetic equivalent,magnetic induction intensity,magnetization,saturation magnetization,remanence,coercivity and magnetic hysteresis loop)of TP304H steel,TP347H steel,S30432steel and other new samples of austenitic heat-resistant steel,samples after service at high temperatures and their carbides were investigated,through magnetic induction intensity measuring instrument,detector for carbides of austenitic steel,integrated physical property measurement system(VSM),heat treatment and metallographic analysis.The results show that,the ferromagneticα′-martensite,high internal stress caused by transformation expansion and weak ferromagnetic carbides lead to high magnetism in the austenitic heat resistant steel boiler tubes after service at high temperatures.The magnetism caused by weak ferromagnetic carbides can be ignored.
作者
史志刚
何晓东
马红
贾建民
崔雄华
SHI Zhigang;HE Xiaodong;MA Hong;JIA Jianmin;CUI Xionghua(Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China)
出处
《热力发电》
CAS
北大核心
2018年第12期53-59,共7页
Thermal Power Generation
基金
中国华能集团有限公司总部科技项目(HNKJ16-H06)
西安热工研究院研究开发基金项目(TN-15-TYK01)~~
关键词
奥氏体耐热钢
锅炉
管材
磁性能
磁化强度
碳化物
austenitic heat-resistant steel
boiler
tube material
magnetic property
magnetization intensity
carbide
作者简介
第一作者:史志刚(1980—),男,高级工程师,主要研究方向为电站部件的组织性能,shizhigang@tpri.com.cn。
