Session: CS-22-01 Repair and Replacement Activities to Maintain Component Integrity

Paper Number: 107519

107519 - Influence of Electrode Weave Width on Weld Heat Input 

In arc welding processes, heat input is a measure of the energy that is supplied to the workpiece to produce the molten weld puddle. Heat input is calculated by taking the arc energy (volts x amperage) divided by the electrode linear travel speed. The units are typically (kJ/mm or kJ/inch). The effect of electrode weaving or oscillating transverse to the forward linear travel speed is typically not accounted for in the heat input calculation. The ASME Section IX committee is considering addition of a new essential variable to account for the effect of weaving on heat input. The basis for this new variable is the notion that using a wide weave and calculating heat input using the forward linear progression of the weld bead as the travel speed results in what seems to be an excessively high heat input. The concern is that a WPS qualified with a high heat input using a wide weave can be used to support a WPS that allows that same heat input using stringer beads. This paper summarizes a literature review and heat input measurements for stringer and weave beads that show adding a new variable for weaving is not necessary and in fact may be inappropriate.

Presenting Author: Mitchell Hargadine EPRI - Welding and Repair Technology Center

Presenting Author Biography: TBA

Authors:

Jonathan Tatman EPRI - Welding and Repair Technology Center
Mitchell Hargadine EPRI - Welding and Repair Technology Center
Steven L. McCracken EPRI