New Code Requirements for Calculating Heat Input
61WELDING JOURNALWelding 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. It s not that the metersare incorrect in fact, most are cali-brated and tested to NIST , the inaccuracy involves the meansof capturing and displaying the data.
WELDING JOURNAL 61 Welding waveforms are used to limit distortion, weld open roots, and to con-trol HAZ properties. Waveform control is …
Download New Code Requirements for Calculating Heat Input
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: