[1]胡志强,杨专钊,李德君,等.某L245N等径三通开裂失效分析[J].焊管,2021,44(2):33-37.[doi:10.19291/j.cnki.1001-3938.2021.02.007]
 HU Zhiqiang,YANG Zhuanzhao,LI Dejun,et al.Cracking Failure Analysis of L245N Equal-diameter Tee[J].,2021,44(2):33-37.[doi:10.19291/j.cnki.1001-3938.2021.02.007]
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某L245N等径三通开裂失效分析()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
第44卷
期数:
2021年第2期
页码:
33-37
栏目:
试验与研究
出版日期:
2021-02-28

文章信息/Info

Title:
Cracking Failure Analysis of L245N Equal-diameter Tee
文章编号:
10.19291/j.cnki.1001-3938.2021.02.007
作者:
胡志强杨专钊李德君霍 轩张骁勇
1. 西安石油大学 材料科学与工程学院, 西安 710065;
2. 中国石油集团石油管工程技术研究院, 西安 710077;
3. 中石油煤层气有限责任公司, 北京 100000
Author(s):
HU Zhiqiang YANG Zhuanzhao LI Dejun HUO Xuan ZHANG Xiaoyong
1. School of Materials Science and Engineering, Xi’an Shiyou University, Xi’an 710065, China;
2. CNPC Tubular Goods Research Institute, Xi’an 710077, China;?/div>
3. PetroChina Coalbed Methane Company Limited, Beijing 100000, China
关键词:
等径三通失效分析L245N热处理
Keywords:
equal-diameter tee failure analysis L245N heat treatment
分类号:
TG142.1
DOI:
10.19291/j.cnki.1001-3938.2021.02.007
文献标志码:
B
摘要:
针对某油田L245N等径三通泄露失效事故,通过荧光磁粉检测、宏微观断口观察、金相组织分析、力学性能测试等方法,对断裂三通失效原因进行了分析。结果显示:断裂起源于三通主管与支管交汇处的内壁,断口呈现明显的脆性断裂特征,除断口外三通内壁还存在多条裂纹;微观组织呈现显著的冷变形组织特征;三通本体冲击韧性显著低于标准要求,而硬度明显高于标准要求。分析表明:此次三通失效的原因是三通冷胀成型工艺控制不当在三通内壁形成裂纹等微观缺陷,加之成型后的三通未按标准要求进行正火处理,从而发生脆性断裂。
Abstract:
In terms of the failure of an L245N equal-diameter tee fracture accident in an oilfield company, through fluorescent magnetic particle testing, macro and micro fracture analysis, metallographic observation and mechanical property test, the failute cause of the fracture tee was analyzed. The results show that the fracture originates from the inner wall of the intersection of the main pipe and the branch pipe of the tee, and the fracture presents obvious brittle fracture characteristics. In addition to the fracture, there are many cracks on the inner wall of tee. The microstructure shows obvious characteristics of cold deformation. The impact toughness of tee body is significantly lower than the standard requirements, while the hardness is significantly higher than the standard requirements. The analysis shows that the failure of the tee is due to the improper control of the cold expansion forming process, the formation of micro defects such as cracks on the inner wall of the tee, and the failure of normalizing the formed tee according to the standard requirements, resulting in brittle fracture.

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备注/Memo

备注/Memo:
收稿日期:2020-09-14
作者简介:胡志强(1994—),男,硕士研究生,就读于西安石油大学材料科学与工程学院,材料工程专业,研究方向为石油管的腐蚀与防护。
更新日期/Last Update: 2021-04-08