post flow

[BrokenBiker]

got a question about post flow after welding.

in using a lift arc dc inverter for all my tig with a gas valve in the torch. Usually welding stainless 1.5mm sheet.

do i need to keep the weld covered in gas after i have stopped the arc or is it just used to protect the tungsten while its cooling.

 

[Tigman]

when you stop welding and stop the arc the gas should shield the weld for a few seconds thats what its for

 

[Lawnmowerboy]

As well as protecting the tungsten from oxidising. That's why you can't whip the torch away too quick.

 

[BrokenBiker]

cheers guys. I thought it was, we did a few outside corner fusion welds with tig when i did my mma course as a sort of taster into tig and they told us to hold the torch over the weld but it was hf so no need to break the arc by moving the torch.

couldn't remember if it was just to save the tungsten or not

 

[Shox Dr]

With scratch start you will have to whip the torch away to break the arc, then quickly reposition the torch so as to shield the weld, not ideal, but the only way you are going to do it.

 

[BrokenBiker]

With scratch start you will have to whip the torch away to break the arc, then quickly reposition the torch so as to shield the weld, not ideal, but the only way you are going to do it.

yeah this is what im currently doing. Would love hf start but cant justify the cost as tig for me is just repairs to small parts for my own benefit