Hi Hamid,
Please see the extract from Sec-IX. Refer Non Mandatory Appendix-H for more details in addition to QW 409. If the power source used is of Non Waveform type then QW-409 a,b or c may be followed. Follow 409.1 (b) or (c) for waveform controlled welding. You may choose one of the 3 stated formula below depending on the power source type. The original formula, QW-4091(a) is the baseline formula for all welding engineers. The other two were adopted later.
Most precise way would be a combination of QW-409.1(a) & QW-409.1(C)-(2)
The ASME Section IX heat input measurement methods in QW-409.1(a) and QW-409.1(b), were developed at a time when welding power source output was relatively constant.
QW-409.1(c) more accurately reflects heat input changes when performing waveform controlled welding, but is also suitable for non waveform controlled (conventional) welding.
Thanks.
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Engineering Specialist
Hamilton, Ontario, Canada
ca.linkedin.com/pub/pradip-goswami/5/985/299
QW-409.1(a)
QW-409.1(C)-(1)
QW-409.1(C)-(2)
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Hamid Firoozi
Sent: Tuesday, October 27, 2015 10:07 AM
To: Materials & Welding
Subject: [MW:23812] heat input for pulse hot wire
Hello Experts
I`m looking for heat input formula for GTAW -Pulse- Hot wire process ,I got many different formula but I can not trust to the references.
So would you please share your information about this subject with me .
Thanks every body
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