Sunday, February 14, 2010

RE: [MW:4309] AFFECT POLARITY IN HEAT INPUT

The formula for determining heat input has the following variables: Amperage, Voltage, Distance and Time.  AxVx60/Inches per Minute. Polarity is not considered in the heat input calculation.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ali asghari
Sent: February-12-10 9:29 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:4297] AFFECT POLARITY IN HEAT INPUT

 

thank you

but my inyention is distribution of heat is differed by polarity , therefore H.I depend to polarity.is it true?

regards

On Sat, Feb 13, 2010 at 2:04 AM, <george.dilintas@gr.bureauveritas.com> wrote:

It is because of the difference of the electrons flow I think


  From: Ali Asghari [asghariali@rocketmail.com]
  Sent: 11/02/2010 23:44 PST
  To: materials-welding@googlegroups.com
  Subject: [MW:4291] AFFECT POLARITY IN HEAT INPUT

 

Hi All

all know that heat input is independent from polarity.but  i see in GTAW that in DCEN ,70%HEAT generated in arc concentrated in parent metal & in DCEP 30% HEAT concentrated in base metal.

can anybody clarify it?

regards.

 

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