小口径管焊接坡口取消内壁机加可行性研究  

Feasibility Study on Eliminating Inner Wall Machining of Small Diameter Tube Welding Groove

作　　者：齐鹏[1] 王强[2] 宋建 QI Peng;WANG Qiang;SONG Jian(Harbin Boiler Company Limited,Harbin 150046,China;State Key Laboratory of Efficient and Clean Coal-fired Utility Boilers(Harbin Boiler Company Limited),Harbin 150046,China)

机构地区：[1]哈尔滨锅炉厂有限责任公司,黑龙江哈尔滨150046 [2]高效清洁燃煤电站锅炉国家重点实验室(哈尔滨锅炉厂有限责任公司),黑龙江哈尔滨150046

出　　处：《锅炉制造》2023年第6期39-40,43,共3页Boiler Manufacturing

摘　　要：常规电站锅炉的过热器、再热器、省煤器中由于单根半元件管子长度较长,因此存在大量管子对接焊口。而目前国内生产的管材存在壁厚不均的现象,工艺上多采用对管子内壁进行机加的方式,以避免管子由于来料壁厚不均导致的焊接错边等问题的产生。本文通过优化工艺流程,调整焊接参数的方法,研究取消热丝TIG焊前两端管子内壁机加的可行性。In the superheater,reheater and economizer of conventional utility boiler,due to the long length of single semi element tube,therefore,there are a large number of tube butt welds.However,most domestic tubes have uneven wall thickness,in the process,the inner wall of the tube is usually machined to avoid problems such as welding misalignment caused by uneven wall thickness of incoming materials.In this paper,by optimizing the process flow,method of adjusting welding parameters,to study and confirm the feasibility of canceling the machining of inner wall of tubes at both ends before hot wire TIG welding.

关 键 词：电站锅炉 热丝TIG焊 焊接错边 内壁机加 

分 类 号：TM621[电气工程—电力系统及自动化]