Problem with Porosity - Are there any welding experts out there?

[Jen Kirley]

Re: Are there any welding experts out there? Problem with porosity

Jennefer doesn't you company have specifications for controling purchased meterials?
additionally most of your welding filler metal when use properly have enough deoxidizer built in to make processing oxygen not usually an issue, but it can be fun to explore. I'd bet more on basic stuff such as elctrode extention, conamination on base material, wind, maybe even the torch it's self did anyone chech the physical/machanical condition of the equipment- like- is the insulator intact? All to often I see folks the that just because we have robwelder we have a cure-all -- WRONG

Not to be a fourm hopper post your question in the follow forum these guys are the top food chain in welding. http://www.aws.org/cgi-bin/mwf/forum_show.pl

Hope this helps

Yes, supplier controls can help, yet things can happen to batches or lots that slip through. Our poster didn't say how long the problem has existed, if it's happening across lots, or how much of that analysis has already been done. So it could be worthwhile to include all the aspects, and methodocally pursue them in a reasoned order when solving the problem.

 

[DPeter67]

Re: Are there any welding experts out there? Problem with porosity

Sorry, this post is about 5 years late, but maybe it can help someone else. Since you are using a GMAW process, the likely canadates are....

Loss of shielding gas -
*Check for high wind conditions - Fans are the usual culprits here
*Leaks in the gas lines
*Obstructions in the gas delivery system -blocked nozzles...

Shielding Gas Quality-
*Moistre in the gas mix

Wire contamination -
*how long has the wire been exposed? is there grind dust, rust, or other contaminants on the spool?

SURFACE METAL CONDITIN -
*the weld area and approximately 1 inch on either side should be FREE from: rust, mill scale, paint, coatings, and debris of any kind.

Check your contact tip to Work Distance (should be less than 3/4" (19.5mm))

98/2 ArCo2 is an excellent gas choice.
ER70S-6 is an excellent choice.