[TheForge] I don't get it...babble OT

[Peter Fels And Phoebe Palmer]

Uhhh, Just ignore this please
Just to prod a dead horse a few more times....
I'd assumed that the speed of heating with the TIG couldn't be 
That abrupt ,or high carbon and/or alloys would crack  on both 
sides of the weld bead.
  There is some considerable amount of time for most of that oily 
material, and even low temperature metals, to fume off and be 
blown away by the gas flow. It's hot, it's shielded and it's 
agitated.
How can the tiny fraction of remaining oil be enough to cause 
porosity?
I dunno...but it seems to be the case.
I'd imagined that the TIG .with it's searing actinic plasma and 
enveloping shielding gas, would be partly immune to those petty 
considerations. Why's TIG so fussy?
Or do i still have technical problems?
Or am i simply incompetent?
Why ask when i probably know already?
Why ask when these aren't fruitful question?
Useless fruit of the mating of the keyboard and cup.
See, not one hammer has fallen.
Spent the day on the old rusty-pipe scaffold patching the" 
temporary tar paper" on the shop exterior....pf



Bob Ehrenberger wrote:
>> Date: Mon, 18 Dec 2006 08:30:44 -0500
>> From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
>> Subject: RE: [TheForge] I don't get it...
>>
>> At forge-welding temperature, oil isn't oil anymore.  It's just another
>> source of carbon and hydrogen.
>>
>> Electric welds don't heat the metal generally or for as long, so grease
>> may perhaps remain grease in a TIG weld.  Just speculation.
>>
>> Bruce
>> NJ
> 
> Maybe the problem is that the oil adds carbon to the weld and changes the
> composition of the material making it more brittle and creating a bad weld.
> 
> Robert Ehrenberger
> Shelbyville, Mo.
> eforge at centurytel.net
> 
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