[MW:23822] RE: 23812] heat input for pulse hot wire

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

pgoswami@quickclic.net

pradip.goswami@gmail.com

ca.linkedin.com/pub/pradip-goswami/5/985/299

 

QW-409.1(a)

 

QW-409.1(C)-(1)

 

 

QW-409.1(C)-(2)

 

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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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