Heat input welding

Abstract

One of the main parameters that influence the properties of the welded joints made by arc welding processes is heat input. Providing sufficient reliability of welded structures, especially structures made of high-strength steels, and the development of new materials create a need for more precise measurement parameters on the basis of which to calculate the amount of heat input. In this paper, it is for precisely calculating the amount of heat input necessary to continuously measure the current and voltage during welding. The measured results showed that the current can significantly fluctuate during welding of a weld, that the average current in one part of the weld may vary significantly from the average value of current in the second part of the same weld, and that both may be different from the average value for a current for the whole weld.