[1]苏建科,张思琪,李博锋,等.CT110连续油管环焊工艺对焊接接头组织性能的影响[J].焊管,2020,43(10):45-50.[doi:10.19291/j.cnki.1001-3938.2020.10.008]
　SU Jianke,ZHANG Siqi,LI Bofeng,et al.Effect of Girth Welding Process on Microstructure and Properties of CT110 Coiled Tubing Welded Joint[J].,2020,43(10):45-50.[doi:10.19291/j.cnki.1001-3938.2020.10.008]
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CT110连续油管环焊工艺
对焊接接头组织性能的影响()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
43
期数:
2020年第10期
页码:
45-50
栏目:
工艺与设备
出版日期:
2020-10-28

文章信息/Info

Title:
Effect of Girth Welding Process on Microstructure and
Properties of CT110 Coiled Tubing Welded Joint
文章编号:
10.19291/j.cnki.1001-3938.2020.10.008
作者:
苏建科1; 张思琪1; 李博锋1;  2; 赵海涛1; 王雷雷1; 任 杰1
1. 宝鸡石油钢管有限责任公司， 陕西 宝鸡 721008；
2. 国家石油天然气管材工程技术研究中心， 陕西 宝鸡 721008
Author(s):
SU Jianke1;  ZHANG Siqi1;  LI Bofeng1; 2;  ZHAO Haitao1;  WANG Leilei1;  REN Jie1
1. Baoji Petroleum Steel Pipe Co., Ltd., Baoji 721008, Shaanxi, China;
2. China National Engineering Research Center for Petroleum and Natural Gas Tubular Goods, Baoji 721008, Shaanxi, China
关键词:
连续油管; 对接焊; 热影响区; 力学性能; 疲劳寿命
Keywords:
coiled tubing;  butt welding;  heat affected zone;  mechanical properties;  life fatigue
分类号:
TG115.21，TG115.5
DOI:
10.19291/j.cnki.1001-3938.2020.10.008
文献标志码:
B
摘要:
为了确保连续油管现场修复对接焊缝性能，提高连续油管的使用寿命，设计了两种CT110连续油管环焊对接工艺方案，并进行了焊接试验。采用金相组织分析、显微硬度测试、拉伸性能检测及疲劳试验等方法，分析了两种工艺方案下焊接接头的组织与力学性能。结果显示，两种工艺下所焊CT110连续油管焊接接头的焊缝及热影响区粗晶区组织均以铁素体和粒状贝氏体为主，显微硬度及抗拉强度相当，但工艺方案二所焊接头均匀变形能力更强，疲劳寿命相对提高92%。研究表明，采用工艺方案二将盖面层改为两道焊的工艺措施，能够降低因焊接热作用引起的热影响区回复与再结晶程度，提高焊接接头均匀变形能力，从而提高接头抗低周疲劳性能。
Abstract:
In order to ensure the performance of field repair butt weld of coiled tubing and improve the service life of coiled tubing, two kinds of circumferential butt welding process schemes of CT110 coiled tubing were designed, and welding tests were carried out. The microstructure and mechanical properties of the welded joint under the two processes were analyzed by means of metallographic structure analysis, microhardness test, tensile property test and fatigue test. The results show that ferrite and granular bainite are the main microstructure in weld and HAZ of CT110 coiled tubing welded joint under the two processes, and the microhardness and tensile strength are similar. But in the second scheme, the uniform deformation ability of welded joint is stronger, and the fatigue life is increased by 92%. The results show that the recovery and recrystallization degree of HAZ caused by welding heat can be reduced by changing the cover layer into two pass welding in the second scheme. The uniform deformation ability of welded joint is improved, so as to improve the low cycle fatigue resistance of welded joint.

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备注/Memo

备注/Memo:

收稿日期：2020-05-18

作者简介：苏建科（1978—），男，大学本科，工程师，主要从事油田现场连续管检测、焊接等全生命周期管理技术研究和个性化产品研发服务工作。

更新日期/Last Update: 2020-12-07