电焊机2025，Vol.55Issue(4)：107-112,6.DOI:10.7512/j.issn.1001-2303.2025.04.14
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
Influence of Welding Parameters on the Joining Strength and Failure Modes of the Electric Fusion Welded PE Pipes
摘要
Abstract
Electrical fusion welding is the most common and effective method for connecting polyethylene(PE)pipes in en-gineering.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 tem-perature 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 fail-ure 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
PE100/电熔焊/焊接参数/连接强度/失效模式Key words
PE100/electric fusion welding/welding parameters/joining strength/failure mode分类
矿业与冶金引用本文复制引用
郑建豹,刘剑,张海,张文洲,易际研,缪海波,蔡智会..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):107-112,6.基金项目
浙江省市场监督管理局科技计划(ZC2021B066) （ZC2021B066）
