New Code Requirements for Calculating Heat Input

61 WELDING JOURNALW elding waveforms are used to limitdistortion, weld open roots, and to con- trol HAZ properties. waveform controlis essential for common processes like up-hill GMA pulse welding. Power sourcesthat support pulsing (GMAW-P, GTAW-P, etc.) are the most common waveform -controlled power sources. Those mar-keted as synergic, programmable, or mi-croprocessor-controlled are also likely tosupport waveform -controlled correlation between heat inputand mechanical properties is blurredwhen heat Input is calculated using cur-rent and voltage readings from conven-tional meters. This includes external me-ters and even those located on the weld-ing power source.

WELDING JOURNAL 61 Welding waveforms are used to limit distortion, weld open roots, and to con-trol HAZ properties. Waveform control is essential for common processes like up-

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  Code, Control, Requirements, Waveform, Trol, Code requirements, Con trol, Waveform control

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