The article describes opportunity to improve mechanical properties of welded joints made of steel 09Г2С applying vibration during the welding cycle. The methodology of experimental studies with a description of the oscillation superposition scheme with different frequencies of treatment during welding is carried out. The results of metallographic study and impact strength tests of welded samples are presented.
The article describes opportunity of improvement of physical-mechanical properties of welded joint made of different strength grade pipeline steels (Steel 20 of K42 strength grade and 16ГС – K52) by applying vibration during the welding cycle. It’s shown that maximal positive effect is achieved by vibration frequency approximating to natural-vibration frequency of welded construction.
The description of developed experimental setup for welding product that made of pipeline steels with application of applying vibration with intended frequency approximating to natural-vibration frequency of welded construction unit of pipelines during the welding cycle is presented.
The paper presents research results into the influence of vibration treatment, applied during welding, on enhancing stability of the welded product shapes, mechanical properties and microstructure of the resulting welded joints.
