焊管2024，Vol.47Issue(11)：58-63,68,7.DOI:10.19291/j.cnki.1001-3938.2024.11.009
管道内局部焊瘤对风送内挤涂工艺的影响及改进措施
Influence and Improvement Measures of Partial Welding Overlap inside Pipeline on Extrusion Coating Process of Pneumatic Conveying
摘要
Abstract
In order to study the influence of welding overlap inside the pipeline on the extrusion coating process of pneumatic conveying,a single 10 m long seamless pipe was welded to form a transportation pipeline by the argon arc welding,the welds at different welding overlap in the pipeline were coated by the extrusion coating process of the pneumatic conveying,and the uniformity,the coating effect and the coating quality of the coating layer were studied,so as to determine a suitable coating scheme to improve the corrosion resistance of the pipe body.The results show that the height of the welding overlap is very important to the anticorrosion effect of the extrusion coating process of the pneumatic conveying.When the height of the welding overlap is less than 2 mm,the extrusion coating effect can be uniform and the anticorrosion effect can be obtained.The wetting angle of the internal anticorrosive material is 35°and the viscosity is 4 500 mPa·s,which can effectively improve the coating effect and quality of the weld with uneven structure.When the extrusion coating speed is 2～3 m/s,the coating effect of pipe surface and weld is more smooth and uniform.The reduction of the viscosity and contact angle of the coating can also improve the fluidity and wettability of the coating at the weld,thus promoting the uniform spread of the coating,reducing air foam and pinholes,improving the density and adhesion of the coating,and improving the coating effect.关键词
风送内挤涂/管道内防腐/焊瘤高度/焊缝涂覆效果/挤涂速度Key words
extrusion coating process of pneumatic conveying/pipeline internal coating/height of welding overlap/coating effect of the weld/extrusion coating speed分类
矿业与冶金引用本文复制引用
王鹏,何小鹏,王小鹏,陈静,王玺程,刘瑞凡,汲江涛,王雷..管道内局部焊瘤对风送内挤涂工艺的影响及改进措施[J].焊管,2024,47(11):58-63,68,7.基金项目
国家自然科学基金"CrCoNi中熵合金梯度孪晶结构多角度作用下止裂增韧原理与设计"(项目编号12102340) （项目编号12102340）
陕西高校青年创新团队建设(陕教函2023-997-29) （陕教函2023-997-29）
西安石油大学青年科研创新团队(批准号:2019QNKYCXTD14) （批准号:2019QNKYCXTD14）
清华大学高端装备界面科学与技术全国重点实验室开放基金"TC4钛合金跨尺度晶粒结构设计与耐磨增韧原理"(项目编号SKLTKF22B10). （项目编号SKLTKF22B10）
