New method of calculating the amount of heat input to the weld

Abstract: New method of calculating the amount of heat introduced into the
welded joint is presented. Instead of the previously used measure of heat input
per unit length, heat input per unit volume was proposed. The proposed method
and general formula are based on the basic technological parameters of the
welding process (i.e. energy generated by the electric arc and welding speed) and
the cross-sectional area of the fusion zone in the welded joint. A simplified method
of calculating heat input per unit volume is presented by using simple formulas
to calculate the surface area of the fusion zone in cross-section of the weld
for the most common shapes in classic welding methods. The proposed general
formula allows for a more accurate way of calculating the heat input per unit of
volume depending on the the energy generated by the electric arc (e.g. for pulse
current) and the surface area of the reinforcement and fusion zone using other
direct measurement methods.

doi: 10.17729/ebis.2020.3/2