SURFACE DEFORMATIONS REDUCTION BY MEANS OF HEAT TREATMENT IN THE COURSE OF BUTT-SEAM WELDING
Surface deformations, caused by the process of butt-seam welding, appear to be an issue, which emerges due to the discrepancy of thermal expansions in the weld seam and surrounding material. Unrelieved stresses along with welding deformations to a wide extent exert deleterious effect on obtaining of precise measurements of the construction, its availability to application and prime cost. These factors to the full extent reflect the necessity of the employment of different technologies, focused on the minimization of deleterious effects in the welding processes. The given technologies are applied to secure values of welding unrelieved stresses and deformations to be below standard ones. The size of deformation can be minimized as a result of tailor-made methodology of welding preparation; welding maintenance and post-process quality control of the carried out work. In this paper we present the high-temperature processing is used for elimination of deformations caused by welding process. Essential corresponding parameters of cooling are determined by means of thermal database, created in the course of modelling with application of methods of finite elements.