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[1]蒋庆梅,邓丽阳,王昊,等.X80管道焊缝热影响区硬度预测公式与应用[J].油气储运,2025,44(05):1-11.
　JIANG Qingmei,DENG Liyang,WANG Hao,et al.Prediction equation for hardness in heat-affected zone of X80 pipeline welds and its application[J].Oil & Gas Storage and Transportation,2025,44(05):1-11.
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X80管道焊缝热影响区硬度预测公式与应用

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 44 期数: 2025年05期 页码: 1-11 栏目: 出版日期: 2025-05-25
Title:
Prediction equation for hardness in heat-affected zone of X80 pipeline welds and its application
作者:
蒋庆梅1; 邓丽阳2; 王昊2; 张小强1; 甄莹3; 任东东1
1.国家管网集团工程技术创新有限公司；2. 中国石油大学（北京）油气管道输送安全国家工程研究中心；3.中国石油大学（华东）储运与建筑工程学院
Author(s):
JIANG Qingmei1;  DENG Liyang2;  WANG Hao2;  ZHANG Xiaoqiang1;  ZHEN Ying3;  REN Dongdong1
1. PipeChina Engineering Technology Innovation Co., Ltd.; 2. National Engineering Research Center for Pipeline Safety, China University of Petroleum (Beijing); 3. College of Pipeline and Civil Engineering, China University of Petroleum (East China)
关键词:
X80管道; 热影响区; 硬度预测; 经验方程
Keywords:
X80 pipeline;  heat-affected zone (HAZ);  hardness prediction;  empirical equation
分类号:
TE832
文献标志码:
A
摘要:
【目的】在油气管道长期服役过程中，环焊缝热影响区性能不均是导致管道失效的重要因素之一，尤其对于高钢级管道，这一问题尤为严重。工程实践中常用硬度作为评估钢材性能的重要指标，为了提升管道的安全性并降低失效风险，需要对环焊缝热影响区的硬度进行精确预测。【方法】通过开展热模拟实验和硬度实验，获得热模拟试样硬度和全尺寸环焊接头热影响区硬度数据库。在传统最大热影响区硬度预测方程的基础上，并列考虑热影响区由800℃冷却至500℃所需时间t8/5、一次峰值温度、二次峰值温度，利用热模拟试样硬度数据库，拟合出预测热影响区硬度分布的经验方程。并将该方程应用于实际焊接接头，结合有限元模型计算得到的全尺寸焊接接头温度历程，对其热影响区硬度分布进行预测。预测结果与全尺寸环焊接头热影响区硬度数据库进行比较以验证公式的准确性。【结果】针对全自动焊和组合自动焊两种焊接工艺下的全尺寸接头，该预测公式在热影响区预测的硬度均值平均相对误差分别为2.27%和1.12%，该公式具有较高的预测准确性。【结论】尽管该公式在硬度极值波动与分布预测方面存在较大误差，但整体上能够有效地对管道焊缝区域的整体材料性能进行评估，可为提高焊缝质量、优化焊接工艺参数提供科学指导，增强油气管道的整体安全性和可靠性。
Abstract:
[Objective] During the long-term operation of oil and gas pipelines, uneven performance in the heat-affected zone (HAZ) of girth welds is recognized as a significant factor contributing to pipeline failures, particularly in pipelines constructed with high-grade steel. Hardness is widely regarded as a critical indicator of steel performance in engineering practice. To enhance pipeline safety and mitigate the risk of failure, it is essential to accurately predict the hardness in the HAZ of girth welds. [Methods] Through thermal simulation experiments and hardness testing, a comprehensive hardness database was established for thermal simulation specimens and the HAZ of full-sized girth welds. Building on the traditional prediction equation for the maximum hardness in the HAZ, an empirical equation was developed through fitting, to predict the hardness distribution in the HAZ. This equation leverages the established database and incorporates factors such as the time (t8/5) required to cool from 800°C to 500°C in the HAZ, the primary peak temperature, and the secondary peak temperature. By applying this equation to actual welds, the hardness distribution in the HAZ was predicted based on the temperature history of full-sized welds, which was derived from calculations using a finite element model. The prediction results were then compared with the hardness database for the HAZ of full-sized girth welds to verify the accuracy of the proposed empirical equation. [Results] The average relative errors in the mean predicated values of hardness in the HAZ was 2.27% and 1.12%, respectively, for full-sized welds produced under two different welding procedures: full automatic welding and combined automatic welding. These results indicate a high prediction accuracy of the proposed equation. [Conclusion] Although the equation showed significant errors in predicting the extreme fluctuations and distribution of hardness, it can effectively assess the overall material properties of pipeline weld areas. This provides scientific guidance for improving weld quality and optimizing welding parameters, and helps enhance the overall safety and reliability of oil and gas pipelines.

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备注/Memo

基金项目：国家自然科学基金项目“火驱服役环境多场耦合作用下低铬套管钢失效机理研究”，52304013；国家重点研发计划“中俄管道重大风险防控与安全保障关键技术”，2022YFC3070100；中国石油大学（北京）科研基金项目“掺氢管道环焊缝失效机理与评价方法研究”，2462023BJRC005
作者简介：蒋庆梅，女，1986年生，高级工程师，2010年硕士毕业于东北大学材料加工专业，现主要从事油气长输管道工程设计、管材、焊接、检测及标准化等工作。地址：天津市滨海新区第二大街与新城东路交口MSD-B1座大厦，300450。电话：15233166192。Email：316667696@qq.com
通信作者：王昊，男，1991年生，讲师，2019年博士毕业于美国普渡大学航空航天工程专业，现主要从事油气管道结构安全与适用性评价的相关研究。通信地址：北京市昌平区府学路18号中国石油大学（北京），102249。电话：010-89731239。Email：hao.wang.37@cup.edu.cn

更新日期/Last Update: 2025-03-06