Si对离心铸造25Cr35NiNb+微合金乙烯裂解炉管抗氧化和抗渗碳性能的影响  

Effects of Si on Oxidation and Caburization Resistance of Spun Cast 25Cr35NiNb + Micro-Alloy Ethylene Pyrolysis Furnace Tube

作　　者：钱兵 孙嘉繁 谢菲 连晓明 QIAN Bing;SUN Jia -fan;XIE Fei;LIAN Xiao -ming(Hefei General Machinery Research Institute Co. , Ltd. , National Technology Research Center on Pres- sure Vessel and Pipeline Safety Engineering, Anhui Provincial Laboratory for Safety Technology of Pres- sure Vessels and Pipelines, Hefei 230031 ,China;Special Equipment Inspection Station of Hefei General Machinery Research Institute Co. , Ltd. , Hefei 230031, China)

机构地区：[1]合肥通用机械研究院有限公司国家压力容器与管道安全工程技术研究中心安徽省压力容器与管道安全技术省级实验室,安徽合肥230031 [2]合肥通用机械研究院特种设备检验站有限公司,安徽合肥230031

出　　处：《压力容器》2018年第5期28-34,共7页Pressure Vessel Technology

基　　金：国家重点研发计划项目(2017YFF0210402)

摘　　要：开展了不同Si元素含量对25Cr35NiNb+微合金乙烯裂解炉管抗高温氧化和抗渗碳性能的影响研究。结果表明,Si含量在1.33%~1.93%范围内,炉管室温和高温力学性能与Si含量之间没有明显规律;Si含量在1.53%~1.91%范围内,随着Si含量的提高,炉管抗高温氧化和抗渗碳性能显著增强。同时还给出了25Cr35NiNb+微合金乙烯裂解炉管中Si元素含量的推荐值。The effects of different content of Si element on oxidation and caburization resistance of spun cast 25Cr35NiNb ＋ micro-alloy ethylene pyrolysis furnace tube were researched. The results show that when the Si content falls in the range of 1. 33% - 1. 93%,there is no significant law between the mechanical properties of the furnace tubes at room and high temperature and Si content; when the Si content falls in the range of 1. 53% - 1. 91%,with the increase of Si content,the resistance to oxidation and carburization of the furnace tubes at high temperature was substantially enhanced. At the same time,the recommended value of Si element content in 25Cr35NiNb ＋ micro-alloy ethylene pyrolysis furnace tube was given.

关 键 词：高温氧化 渗碳 硅 25Cr35NiNb+微合金乙烯裂解炉管 

分 类 号：TH49[机械工程—机械制造及自动化] TG142.33[一般工业技术—材料科学与工程]