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[1]朱瑞,洑阳成明,浦江,等.长期高温服役CO转化炉炉管的损伤[J].南京工业大学学报(自然科学版),2020,42(05):586-593.[doi:10.3969/j.issn.1671-7627.2020.05.006]
 ZHU Rui,FUYANG Chengming,PU Jiang,et al.Damage of furnace tubes in CO reformer after long-term service at elevated temperature[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(05):586-593.[doi:10.3969/j.issn.1671-7627.2020.05.006]
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长期高温服役CO转化炉炉管的损伤()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年05期
页码:
586-593
栏目:
出版日期:
2020-09-20

文章信息/Info

Title:
Damage of furnace tubes in CO reformer after long-term service at elevated temperature
文章编号:
1671-7627(2020)05-0586-08
作者:
朱瑞1洑阳成明1浦江2耿鲁阳1唐建群1巩建鸣1
1.南京工业大学 机械与动力工程学院 极端承压装备设计与制造重点实验室, 江苏 南京 211800; 2.江苏省特种设备安全监督检验研究院,江苏 南京 210036
Author(s):
ZHU Rui1FUYANG Chengming1PU Jiang2GENG Luyang1TANG Jianqun1GONG Jianming1
1. Key Laboratory of Design and Manufacture of Extreme Pressure Equipment, School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China; 2. Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Nanjing 210036, China
关键词:
炉管 HP40Nb合金 损伤 微观组织 高温力学性能
Keywords:
furnace tube HP40Nb alloy damage microstructure high-temperature mechanical
分类号:
TG115.9
DOI:
10.3969/j.issn.1671-7627.2020.05.006
文献标志码:
A
摘要:
采用光学显微镜和扫描电子显微镜,对长期高温服役CO转化炉炉管材料HP40Nb合金进行微观组织的观察和相组成的能谱分析,并在900 ℃条件下对炉管材料的高温力学性能进行测试。结果表明:在长期高温服役过程中,炉管已受到一定程度的损伤。HP40Nb合金晶界上存在单个和链状的蠕变孔洞及微裂纹,沿晶分布的骨架状共晶碳化物逐渐发生分解,形成蠕虫状和块状碳化物,基体中弥散析出二次碳化物。在相演变过程中,部分碳化铌(NbC)转变成富含Ni、Nb、Si的脆性G相(Ni16Nb6Si7),G相转变过程中释放出的C元素与Cr元素结合,使得晶界处的富Cr碳化物(M23C6)数量不断增加并粗化长大。微观组织的改变、G相的形成和晶界处新析出M23C6碳化物的增加,导致材料的高温力学性能发生变化。
Abstract:
The microstructures and phase compositions of HP40Nb alloy used in the furnace tubes of CO reformer after long-term service at elevated temperature were analyzed by optical microscope and scanning electron microscope with energy spectrometer, and the high-temperature tensile properties were investigated at 900 ℃. Results showed that the damage was occurred on furnace tubes to some extent after long-term service at elevated temperature. The isolated and chain-like creep cavities as well as micro-cracks were found at the grain boundaries of HP40Nb alloy used for fabricating furnace tubes. The skeleton-like primary carbides along the grain boundary gradually dissolved into worm-like and blocky structures, and numerous secondary carbides were dispersed and precipitated in the matrix. During the evolution of phases, partial Niobium carbide(NbC)were transformed into brittle G phase(Ni16Nb6Si7)that was rich in Ni, Nb and Si. C element released during the transformation of G phase would be combined with the Cr element to form Chromium-rich carbide(M23C6), which increased the amount of M23C6 in the grain boundaries. The M23C6 carbide would gradually coarsen and grow. The coarsening and growth of newly-developed M23C6 carbide at the grain boundaries and the formation of the G phase would contribute to the changes of the high-temperature mechanical properties for HP40Nb alloy.

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[2]吴望周.服役43000小时HK—40转化炉管的金相组织与裂纹状况分析[J].南京工业大学学报(自然科学版),1983,5(02):114.
[3]孙幸龙,王新生.疲劳对HK——40炉管蠕变裂纹扩展的影响[J].南京工业大学学报(自然科学版),1987,9(01):81.
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 Ju Guozhong Wu Baojuan Yu Xiaochun Wu Wangzhou Department of Mechanical Engineering,Nanjing University of Chemical Technology,Nanjing,et al.PRELIMINARY ANALYSIS ON FAILURE OF F301 FURNACE TUBES IN A LINEAR ALKYLBENZENE PLANT[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),1996,18(05):80.
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备注/Memo

备注/Memo:
收稿日期:2019-12-16
基金项目:国家重点研发计划(2018YFC0808800)
作者简介:朱瑞(1995—),男,E-mail:nathan.r.zhu@foxmail.com; 唐建群(联系人),副教授,E-mail:tjq0231@yeah.net.
引文格式:朱瑞,洑阳成明,浦江,等.长期高温服役CO转化炉炉管的损伤[J].南京工业大学学报(自然科学版),2020,42(5):586-593.
ZHU Rui, FUYANG Chengming, PU Jiang, et al. Damage of furnace tubes in CO reformer after long-term service at elevated temperature[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(5):586-593..
更新日期/Last Update: 2020-09-24