Gas Metal Arc Welding – Temperature characteristics (Part II)

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Authors

  • Mahadev Shome
     Freelance Consultant in Materials & Welding ,IN

DOI:

https://doi.org/10.22486/10.22486/iwj.v55i4.217828

Keywords:

GMAW, heat-input, temperature-time plot, weld, HAZ, short-circuit, waveform.

Abstract

.Temperature distribution in the workpiece during gas metal arc welding are valuable information that can help diagnose the weld joint quality and take corrective measures by fine tuning the welding parameters. The temperature isotherms and temperature-time plots of specific locations in the weld joint are predicted using mathematical models, wherein the heat of welding is a major input. The heatinput can be derived from the current and voltage waveforms of power sources and can be used to predict the temperature distribution and time-temperature profile. Modern power sources have addressed short comings related to burn-through and spattering by controlling current and voltage waveforms without any instantaneous heat spikes and maintaining steady heat-input throughout the process. The temperature maps are indicative of heat variation during welding.

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Published

2022-10-01

Issue

Volume 55, Issue 4, October 2022

Section

TIT Bit in Welding

 

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