电焊机2024，Vol.54Issue(4)：111-116,6.DOI:10.7512/j.issn.1001-2303.2024.04.16
封闭式自熔焊工艺参数对薄壁不锈钢管焊缝成形的影响
Effect of Closed Self-fusion Welding Process Parameters on Weld Forming of Thin Thickness Stainless-steel Tube
王龙 1毛琪钦 1石佳文 1刘挺松1
作者信息
- 1. 上海宝冶工程技术有限公司,上海 200942
- 折叠
摘要
Abstract
The fully mechanized gas tungsten arc welding(GTAW)of a closed-head on a thin-walled stainless steel pipe with dimensions of ∅ 12×2 mm was systematically studied to investigate the effects of various welding parameters on the weld formation.Tensile,bending,non-destructive testing,and macroscopic metallographic examination methods were em-ployed to verify the mechanical properties and microstructure characteristics of the welded joints in thin-walled stainless steel pipes.Ideal welding parameters were developed for different welding positions.The results indicate that the base/peak current,duty cycle,tungsten electrode height,and shielding gas flow rate are the primary factors affecting weld formation.During orbital welding,when the welding position changes from an upright to a vertical downward position,it is necessary to increase the base/peak current to prevent weld defects such as external surface collapse and internal surface depression.The microstructure of the welded joint consists of austenite and ferrite,with the tensile strength of the joint approaching that of the base material.No cracks were observed in the bending test,and no defects such as pores and cracks were detected in the flaw detection test,meeting all relevant standards and requirements.关键词
封闭式自熔焊/薄壁不锈钢管/焊接工艺参数/焊缝成形Key words
closed self-melting welding/thin-walled stainless steel pipe/welding process parameters/weld formation分类
矿业与冶金引用本文复制引用
王龙,毛琪钦,石佳文,刘挺松..封闭式自熔焊工艺参数对薄壁不锈钢管焊缝成形的影响[J].电焊机,2024,54(4):111-116,6.
