[1]李亮,聂向晖,刘迎来,等.高压涡轮机组九级冷却歧管开裂原因分析[J].石油管材与仪器,2020,6(01):52-56.[doi:10.19459/j.cnki.61-1500/te.2020.01.013]
 LI Liang,NIE Xianghui,LIU Yinglai,et al.Cracking Analysis of Ninestage Cooling Manifolds of High Pressure Turbine Units[J].Petroleum Tubular Goods & Instruments,2020,6(01):52-56.[doi:10.19459/j.cnki.61-1500/te.2020.01.013]
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高压涡轮机组九级冷却歧管开裂原因分析
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《石油管材与仪器》[ISSN:2096-0077/CN:61-1500/TE]

卷:
6
期数:
2020年01期
页码:
52-56
栏目:
失效分析与预防
出版日期:
2020-02-25

文章信息/Info

Title:
Cracking Analysis of Ninestage Cooling Manifolds of High Pressure Turbine Units
文章编号:
2096-0077(2020)01--0052-05
作者:
李亮12聂向晖12刘迎来1丰振军12许 彦12
1.中国石油集团石油管工程技术研究院 陕西 西安 710077;2.北京隆盛泰科石油管科技有限公司 北京 101100
Author(s):
LI Liang12 NIE Xianghui12 LIU Yinglai1 FENG Zhenjun12 XU Yan12
1.CNPC Tubular Goods Research Institute, Xi′an, Shaanxi 710077, China; 2.Beijing Longshine Oil Tubular Technology Co.Ltd., Beijing 100101, China
关键词:
冷却歧管力学性能显微组织疲劳裂纹
Keywords:
cooling manifold mechanical property microstructure fatigue crack
分类号:
TE964
DOI:
10.19459/j.cnki.61-1500/te.2020.01.013
文献标志码:
A
摘要:
西三线作业区某高压涡轮机组例行检查过程中,发现部分九级冷却歧管发生了开裂失效。为了分析其开裂原因,使用光谱分析仪、拉伸试验机检测了其理化性能,采用光学显微镜、扫描电镜分析了其组织及断口形貌。结果表明:受高压涡轮机组结构限制,薄壁九级冷却歧管通过环焊缝与带颈法兰固定于高压涡轮机组上,在机组运行过程中承受着较高频率的振动载荷,使冷却歧管内壁环焊缝焊趾处萌生了疲劳裂纹,并逐渐扩展,最终沿环向发生开裂。
Abstract:
During the routine inspection of a highpressure turbine unit in a working area of the 3rd WestEast natural gas pipeline, cracking of ninestage cooling manifolds of high pressure turbine units was found. In order to analyze the reason of cracking, physicochemical properties were tested by spectrum analyzer and tensile testing machine, the microstructure and fracture morphology were analyzed by optical microscope and SEM. The results show that the cooling manifolds were fixed on the high pressure turbine units through girth welding and hubbed flange due to the structural constraint, and they were suffered longterm largescale vibration under a certain frequency. During the longterm operation, fatigue cracks were generated at the weld toe of girth welding on the internal wall of the cooling manifolds and propagated, which caused the circumferential cracking.

参考文献/References:

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备注/Memo

备注/Memo:
第一作者简介:李亮,男,1982年生,高级工程师,2008年毕业于西安交通大学材料科学与工程专业,获硕士学位,现主要从事石油管材技术服务工作。E-mail:lliang002@cnpc.com.cn
更新日期/Last Update: 2020-02-25