理化检验-物理分册2024，Vol.60Issue(5)：4-7,12,5.DOI:10.11973/lhjy-wl202405002
基于正交试验研究燃气用聚乙烯管道热熔接头的冷焊缺陷
Research on cold welding defects of hot melt joints in gas polyethylene pipelines based on orthogonal experiments
宋剑华 1陆扬 2郭涛 1胡铁炯 1张惠祥 1朱国苗1
作者信息
- 1. 绍兴市特种设备检测院,绍兴 312071||绍兴市特种设备智能检测与评价重点实验室,绍兴 312071
- 2. 绍兴中石油昆仑燃气有限公司,绍兴 312030
- 折叠
摘要
Abstract
The hot melt joint of gas polyethylene pipeline with cold welding defects was taken as the research object.The orthogonal experimental method was used to make the hot melt joint sample.The amplitude the reflected echo wave of the sample was detected by multi frequency microwave,and the tensile test was carried out on the sample.The morphology of the fracture surface of the sample after stretching was observed using scanning electron microscopy.The results show that as the surface temperature of the heating plate decreased and the heat absorption time decreased,the degree,length and proportion of cold welding of the hot melt joint increased,while the maximum tensile strength and displacement at tensile fracture of the specimen decreased.There was a positive relationship between the degree of micro molecular entanglement in hot melt joints and the severity of cold welding.关键词
热熔接头/冷焊/微波检测/拉伸试验/分子缠结Key words
hot melt joint/cold welding/microwave detection/tensile test/molecular entanglement分类
通用工业技术引用本文复制引用
宋剑华,陆扬,郭涛,胡铁炯,张惠祥,朱国苗..基于正交试验研究燃气用聚乙烯管道热熔接头的冷焊缺陷[J].理化检验-物理分册,2024,60(5):4-7,12,5.
