Evaluation of Vibration Treatment Effect on Mechanical Properties of Welded Joints of Steel Pipes 5CrMo16

Abstract

In modern refining conditions associated with increasing requirements for the quality of products produced and ensuring the safety of processes, the operating conditions of the equipment are becoming more complicated, and the range of materials used is expanding. A significant part of the equipment, especially used to carry out high-temperature processing processes in hydrogen sulfide and oxidative sulfur-containing media, is made of heat-resistant chromomolybdenum steels of the type 5CrMo16, the welding process of which is quite complicated. In this work, studies of the mechanical properties of welded joints made of steel are presented 5CrMo16 under various modes of loading welded joints during welding, and new results on the crack resistance of welded joints during repeated heating are also experimentally obtained. Conclusions on the level of residual stresses in the samples, strength characteristics of the weld, as well as the fracture resistance of the weld metal of the examined samples were made.