塑料科技2026，Vol.54Issue(6)：139-143,5.DOI:10.15925/j.cnki.issn1005-3360.2026.06.023
热熔温度对聚乙烯燃气管道焊接接头性能的影响
Effect of Heat Fusion Temperature on Performance of Polyethylene Gas Pipeline Welding Joints
摘要
Abstract
Heat fusion welding was one of the primary methods for connecting polyethylene(PE)pipes,and the heat fusion process parameters significantly influenced the properties of the welded joints and the overall pipeline performance.In the study,the heat fusion welding temperature was selected as the variable,and different welded specimens were prepared by referring to the qualified welding procedure specification(WPS).The properties of PE welded joints at different heat fusion temperatures were subsequently analyzed.The results indicated that the heat fusion temperature exerted a significant effect on the performance of PE welded joints.The tensile strength,impact toughness,and initial storage modulus all exhibited a trend of initial increase followed by decrease.The welded joint achieved optimal performance at a heat fusion temperature of 225℃.At heat fusion temperatures of 185℃and 245℃,the number of cracks on the tensile fracture surfaces of the heat-affected zones increased,and oxidation and chain scission of PE molecular chains occurred,demonstrating that excessively low or high heat fusion temperatures compromised the mechanical properties of the welded joints.关键词
聚乙烯管道/热熔焊接/力学性能/储能模量Key words
Polyethylene pipes/Heat fusion welding/Mechanical properties/Storage modulus分类
化学化工引用本文复制引用
宋文静,孙明道,曹丹,李宝增,韩琳彤..热熔温度对聚乙烯燃气管道焊接接头性能的影响[J].塑料科技,2026,54(6):139-143,5.基金项目
河南省基本科研业务费支持项目(2023KY07) （2023KY07）
