# 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

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