Influence of Welding Parameters on the Joining Strength and Failure Modes of the Electric Fusion Welded PE Pipes

ZHENG Jianbao; LIU Jian; ZHANG Hai; ZHANG Wenzhou; YI Jiyan; MIAO Haibo; CAI Zhihui

doi:10.7512/j.issn.1001-2303.2025.04.14

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Influence of Welding Parameters on the Joining Strength and Failure Modes of the Electric Fusion Welded PE Pipes
Vol. 55, Issue 4, Pages: 107-112(2025)
Received：26 April 2024，

Revised：2024-09-07，

Published：20 April 2025
DOI： 10.7512/j.issn.1001-2303.2025.04.14
稿件说明：

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郑建豹，刘剑，张海，等.焊接参数对聚乙烯（PE）圆管电熔焊接头连接强度和失效模式的影响［J］.电焊机，2025，55（4）：107-112. DOI： 10.7512/j.issn.1001-2303.2025.04.14.

ZHENG Jianbao, LIU Jian, ZHANG Hai, et al.Influence of Welding Parameters on the Joining Strength and Failure Modes of the Electric Fusion Welded PE Pipes[J].Electric Welding Machine, 2025, 55(4): 107-112. DOI： 10.7512/j.issn.1001-2303.2025.04.14.

摘要

电熔焊是工程中连接聚乙烯（PE）管道最为常见、有效的方法，其焊接参数对焊接接头的力学性能和失效模式具有重要影响。研究采用不同的焊接参数对PE100圆管进行电熔焊接，通过拉伸剥离试验评价焊接接头的力学性能，并采用光学显微镜和体式显微镜表征焊接接头与失效界面的形貌。焊接电压、焊接时间和环境温度作为变量，系统评估其对焊接接头质量的影响。试验结果表明，随着焊接电压的提高，熔合区宽度逐渐增大，接头的力学性能呈现出先上升后下降的趋势。焊接电压为39.5V时，焊接接头的拉伸剥离强度最高可达1 191 N；当焊接电压超过41.5 V时，连接界面出现因塑料分解导致的烧蚀与孔洞，显著降低了焊接接头的力学性能。焊接接头呈现出三种典型的失效模式：焊接电压小于37.5V时为脆性+韧性的复合失效模式；焊接电压为39.5 V时为完全的韧性失效模式；焊接电压大于41.5 V时为强度衰退的韧性失效。焊接参数和焊接热输入对电熔焊的影响具有两面性。为了保证接头的力学性能，需要对焊接参数进行优化和调控，避免熔合面破坏和烧蚀孔洞的产生。

Abstract

Electrical fusion welding is the most common and effective method for connecting polyethylene (PE) pipes in engineering. The welding parameters significantly influence the mechanical properties and failure modes of the welded joints. Different welding parameters were used to perform electrical fusion welding on PE100 pipes. The mechanical properties of the welded joints were evaluated through tensile peeling tests

and the morphology of the welded joints and failure interfaces was characterized using optical microscopes and stereomicroscopes. Welding voltage

welding time

and environmental temperature were taken as variables to systematically assess their impact on the quality of the welded joints. Test results show that as the welding voltage increases

the width of the fusion zone gradually enlarges

and the mechanical properties of the joints first rise and then decline. When the welding voltage is 39.5 V

the tensile peeling strength of the welded joint can reach up to 1

191 N; when the welding voltage exceeds 41.5 V

burnout and holes caused by plastic decomposition begin to appear on the connection interface

significantly reducing the mechanical performance of the welded joints. Three typical failure modes of the welded joints are observed: a combination of brittleness and toughness when the welding voltage is less than 37.5V; a complete toughness failure mode when the welding voltage is 39.5 V; and a strength-declining toughness failure when the welding voltage is greater than 41.5 V. The influence of welding parameters and heat input on electrical fusion welding is a double-edged sword. To ensure the mechanical properties of the joints

it is necessary to optimize and regulate the welding parameters

avoiding damage to the fusion surface and the occurrence of burnout and holes.

关键词

Keywords

references

Xu G . An outlook analysis on China's natural gas consumption forecast by 2035：Applying a seasonal forecasting method ［J］. Energy ， 2023 ， 284 ： 128602 .

新华社 . 中共中央国务院关于完整准确全面贯彻新发展理念做好碳达峰碳中和工作的意见［EB/OL］. （ 2021-10-24 ）［ 2024-04-26 ］. https：//www.gov.cn/zhengce/2021-10/24/content_5644613.htm https://www.gov.cn/zhengce/2021-10/24/content_5644613.htm .

杨仁洁 . 我国城市燃气行业发展形势分析与思考［J］. 金陵科技学院学报：社会科学版， 2021 ， 35 （ 1 ）： 37 - 41 .

YANG R J . Analysis and Thoughts on the Development Situation of China City Gas Industry ［J］. Journal of Jinling Institute of Technology（Social Sciences Edition）， 2021 ， 35 （ 1 ）： 37 - 41 .

方召君 . 浅谈我国城市燃气发展现状与趋势［J］. 大众科技， 2019 ， 21 （ 1 ）： 112 - 114 .

FANG Z J . Brief Discussion on the Development of Current Situation and Tendency of Urban Gas in China ［J］. Popular Science & Technology ， 2019 ， 21 （ 1 ）： 112 - 114 .

李兆璞，武立文，乔亮，等 . 聚乙烯管道热熔焊接技术研究进展［J］. 中国塑料， 2022 ， 36 （ 10 ）： 104 - 116 .

LI Z P ， WU L W ， QIAO L ， et al . Research progress in polyethylene pipeline hot melt welding technology ［J］. China Plastics ， 2022 ， 36 （ 10 ）： 104 - 116 .

赵红 . 聚乙烯管道焊接技术和评价方法［J］. 中国塑料， 2011 （ 7 ）： 48 - 53 .

ZHAO H . Welding Technology and Evaluation Method of Polyethylene Pipes ［J］. China Plastics ， 2011 （ 7 ）： 48 - 53 .

宋晓娟，彭星煜，喻建胜，等 . 含工艺缺陷PE管道热熔焊接接头力学性能测试分析［J］. 热加工工艺， 2020 ， 49 （ 15 ）： 100 - 103+109 .

SONG X J ， PENG X Y ， YU J S ， et al . Testing and Analysis of Mechanical Properties of Hot Melt Welded Joints of PE Pipeline Containing Process Defects ［J］. Hot Working Technology ， 2020 ， 49 （ 15 ）： 100 - 103+109 .

徐书丰，周波，黄磊，等 . 疲劳试验评价缺陷对PE管热熔焊接接头长期性能的影响［J］. 化工装备技术， 2022 ， 43 （ 5 ）： 20 - 24 .

XU S F ， ZHOU B ， HUANG L ， et al . Influence of Fatigue Test Evaluation Defects on Long-term Performance of PE Pipe Hot-Melt Welded Joints ［J］. Chemical Equipment Technology ， 2022 ， 43 （ 5 ）： 20 - 24 .

董守江，邱建新，温友林，等 . PE管热熔（焊接）粘接缺陷的研究［J］. 中国特种设备安全， 2015 （ 07 ）： 65 - 69 .

DONG S J ， QIU J X ， WEN Y L ， et al . Research on Hot Melt（Welding） Bonding Defects of PE Pipe ［J］. China Special Equipment Safety ， 2015 （ 07 ）： 65 - 69 .

张国强，孙宝财 . 氧化皮对PE管材焊接接头性能的影响［J］. 现代塑料加工应用， 2022 （ 02 ）： 39 - 42 .

ZHANG G Q ， SUN B C . Influence of Oxide Scale on Properties of PE Pipe Welded Joints ［J］. Modern Plastics Processing and Applications ， 2022 （ 02 ）： 39 - 42 .

曹善刚 . 大口径HDPE管道电熔焊接缺陷分析及应对措施［J］. 中国设备工程， 2022 （ 2 ）： 175 - 176 .

CAO S G . Analysis and Countermeasures of Electric Fusion Welding Defects in Large-diameter HDPE Pipes ［J］. China Plant Engineering ， 2022 （ 2 ）： 175 - 176 .

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