Development of Technological Recommendations for Improving the Quality of Welded Joints of Pipeline System Elements Made of Stainless Alloys for Aviation Purposes

There is a substantial body of literature on improving the quality of welded joints of stainless steels. However, as practice shows, in a single production facility the level of defects can be quite high, which can be explained by the specifics and features of this production. Currently, there is insufficient information about the optimal modes of argon arc welding of thin-walled stainless steel pipe systems. The welding modes given in the current regulatory documentation are not always relevant and optimal for modern welding equipment. In addition, there is no model to predict the change in the mechanical properties of the weld depending on the welding parameters. This leads to the need to carry out a series of laborious experiments for each new alloy or piece of welding equipment in order to build diagrams that allow you to determine the range of parameters for obtaining the best quality welded joints. This study examines the influence of argon arc welding on the structure and properties of welded joints of thin-walled stainless steel elements of pipeline systems. A linear regression model is obtained that reflects the dependence of the tensile strength of the welded joints on the argon arc welding mode. Technological recommendations for manufacturing welded elements for stainless steel pipeline systems for aviation purposes are developed.

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