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[1]范玉然,帅义,张铁耀,等.X80钢制管道环焊缝应变时效特性及预测方法[J].油气储运,2025,44(02):184-193.[doi:10.6047/j.issn.1000-8241.2025.02.007]
　FAN Yuran,SHUAI Yi,ZHANG Tieyao,et al.Strain aging characteristics and prediction method for girth welds in X80 steel pipelines[J].Oil & Gas Storage and Transportation,2025,44(02):184-193.[doi:10.6047/j.issn.1000-8241.2025.02.007]
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X80钢制管道环焊缝应变时效特性及预测方法

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 44 期数: 2025年02期 页码: 184-193 栏目: 出版日期: 2025-02-25
Title:
Strain aging characteristics and prediction method for girth welds in X80 steel pipelines
文章编号:
1000-8241（2025）02-0184-10
作者:
范玉然1; 2; 帅义1; 张铁耀1; 帅健1; 张怡1; 高唯1; 石磊3; 张俊杰1
1.中国石油大学（北京）安全与海洋工程学院 ? 应急管理部油气生产安全与应急技术重点实验室;2.国家管网集团工程技术创新有限公司;3.中国石油化工股份有限公司大连石油化工研究院
Author(s):
FAN Yuran1; 2; SHUAI Yi1; ZHANG Tieyao1; SHUAI Jian1; ZHANG Yi1; GAO Wei1; SHI Lei3; ZHANG Junjie1
1.College of Safety and Ocean Engineering, China University of Petroleum (Beijing)//Key Laboratory of Oil and Gas Safety and Emergency Technology, Ministry of Emergency Management; 2.PipeChina Engineering Technology Innovation Co., Ltd.; 3.SINOPEC (Dalian) Research Institute of Petroleum and Petrochemicals Co., Ltd.
关键词:
油气管道; X80钢; 环焊缝; 冲击韧性; 力学性能; 应变时效
Keywords:
oil and gas pipeline;  X80 steel;  girth weld;  impact toughness;  mechanical property;  strain aging
分类号:
TE832
DOI:
10.6047/j.issn.1000-8241.2025.02.007
文献标志码:
A
摘要:
【目的】长输管道在建设与运行期间不可避免会受到应变时效的影响，导致管道母材与环焊缝的力学性能发生劣化，影响服役安全。随着高钢级X80管道的规模化应用，探究高钢级管道环焊接头应变时效特性及规律对保障管道安全服役具有重要意义。【方法】选取等强匹配X80钢制管道环焊接头作为研究对象，通过标准冲击实验与小尺寸拉伸实验研究环焊接头经不同温度及周期时效处理后的力学性能变化规律；基于大量实验数据与理论模型，建立了X80管道环焊缝应变时效临界劣化时间预测模型。【结果】相较于单一预应变处理或单一高温时效处理，应变时效处理后环焊缝的冲击韧性显著降低，降幅可达68.5％；应变时效处理后，X80钢的应力-应变曲线由“圆屋顶型”转变为“吕德斯型”，材料强度升高、塑性降低；随着时效温度、时效周期的增加，焊缝材料的塑性变形能力急剧劣化。【结论】通过所建应变时效临界劣化时间预测模型，预测得到在服役温度为20℃的条件下，若X80钢环焊缝发生应变集中，其韧性将于约119.7d后劣化至无法满足安全服役要求。研究成果可为高钢级管道环焊缝应变时效的认识、防治及控制提供数据支撑与理论指导。（图10，表5，参21）
Abstract:
[Objective] Long-distance pipelines inevitably experience strain aging during construction and operation, which impacts service safety. With the large-scale application of high-grade X80 pipelines, it is essential to investigate the strain aging characteristics and rules of girth weld joints to ensure their safe operation. [Methods] The study focused on the equal-strength X80 steel pipeline girth weld joints. Standard impact and small-scale tensile tests were conducted to investigate the mechanical property changes of girth weld joints at various aging temperatures and periods. Using extensive test data and theoretical models, a prediction model for deterioration time of X80 pipeline girth welds under strain aging was established. [Results] In comparison to single pre-strain treatment or single high-temperature aging treatment, the impact toughness of girth welds subjected to strain aging was significantly reduced by 68.5％. After strain aging, the stress-strain curve of X80 steel transitioned from “round-house type” to “Lüders type”, with an increase in strength and a decrease in plasticity. Additionally, as aging temperature and periods increased, the plastic deformation capacity of the weld material deteriorated sharply. [Conclusion] Based on the established strain aging prediction model, it is predicted that strain concentration in the girth weld of X80 steel at a service temperature of 20 °C will lead to a deterioration in toughness after approximately 119.7 days, rendering it inadequate for safe service. The research results can provide valuable data and theoretical guidance for understanding, preventing, and controlling strain aging in the girth welds of high-grade steel pipelines. (10 Figures, 5 Tables, 21 References)

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备注/Memo

范玉然，男，1979年生，高级工程师，2007年硕士毕业于北京科技大学材料学专业，现主要从事油气管道材料方面的研究工作。地址：天津市滨海新区第二大街62号泰达MSD-B1座25层，300457。电话：13832683655。Email：fanyr1226@163.com
通信作者：帅义，男，1987年生，副教授，2018年博士毕业于中国石油大学（北京）安全科学与工程专业，现主要从事油气管道检测、风险管理与完整性评价方面的研究工作。地址：北京市昌平区府学路18号，102249。电话：13811386578。Email：yshuai@cup.edu.cn
基金项目：国家自然科学基金资助项目“纳入裂尖多尺度拘束效应的X80管道环焊缝断裂评估方法研究”，52204071；中国石油大学（北京）优秀青年学者科学基金资助项目“高强钢管道环焊缝断裂机理及应变能力研究”，2462023QNXZ006；国家重点研发计划子课题“基于内检大数据的城市燃气管道服役状态综合评价与决策技术研究”，2022YFC3004802-4。
● Received: 2024-06-18● Revised: 2024-07-29● Online: 2024-11-27

更新日期/Last Update: 2025-02-25