摘要
采用基于磁感应强度变化原理的渗碳检测仪,对服役后不同渗碳程度的25Cr35Ni Nb+MA材质乙烯裂解炉管进行磁感应强度检测,通过系列理化试验,对上述炉管渗碳层厚度进行检测。检测结果表明:针对25Cr35Ni Nb+MA材质乙烯裂解炉管,采用渗碳检测仪的磁感应强度检测输出值与炉管渗碳层厚度之间具有良好的对应关系,为渗碳检测仪对在役乙烯裂解炉管渗碳层厚度的检测提供依据。同时,还对不同渗碳层厚度25Cr35Ni Nb+MA材质乙烯裂解炉管不同部位典型组织进行了表征。
By using carburizing testers based on the principle of magnetic flux intensity variation,the magnetic flux intensity of 25Cr35 Ni Nb ＋ MA material ethylene pyrolysis furnace tubes with different degrees of carburization after service were detected. Through a series of physical and chemical tests,carburizing layer thickness of furnace tubes above were detected. The relationship between the magnetic flux intensity and carburized layer thickness of typical material ethylene pyrolysis furnace tubes was established initially,which provides basis for the carburized layer thickness detection of ethylene pyrolysis furnace tubes in service by carburizing testers. The typical microstructure of 25Cr35 Ni Nb ＋ MA ethylene pyrolysis furnace tubes at different parts with different thickness of carburized layer was characterized in this paper.
出处
《压力容器》
2016年第5期56-61,共6页
Pressure Vessel Technology
基金
国家高技术研究发展计划(863计划)资助(2015AA034402)
