Search Result

[jrscgsr]

Grab some new 4043 and try it out.
Or take very fine sandpaper and rub down a 4043 rod to remove any oxidation then wipe down with acetone and try it. May have a layer of oxide that is floating on the surface of your weld causing the dull finish. The aluminum oxide melts at a way higher temperature...

[jrscgsr]

Make sure your joint fit up is corner to corner and not overlapped. You should be punching through 16 gauge without any trouble. You can also lay the part so the joint is in the flat position to weld.

[jrscgsr]

Looks like you tried welding the "bulging" weld vertical up? If so you need to watch a video or two on welding vertical up mig and then practice doing a bunch of them. I also wouldn't bother trying to get the "stack of dimes" look to your weld as you are welding with mig not tig....

[jrscgsr]

You shouldn't be pumping the pedal while tig welding! Those welds are achievable with standard tig welding techniques and a skilled operator, just being very consistent....

[jrscgsr]

It is most definitely tig, the technique is to dab filler and move forward and repeat, pretty straightforward. It's tough to say whether the parts are mild steel or stainless. The gold color on the bead means the shielding gas got great coverage and the weld wasn't too hot.

[jrscgsr]

Sounds like the joint is sealing, then as you are almost completing it there is pressure created by the expanding gas and it is contaminating your weld from inside the joint.

[jrscgsr]

I also find if the slag is a pain to clean out on the toe of my beads on a groove weld I will wiggle the weld in to make it slightly wider and sit flat so I don't have a low spot on either side of my bead that let's the slag hang on.

[jrscgsr]

Hey Kevin
Always clean spatter and any sharp edges that's just doing a job right. Unless specified don't grind your welds.

[jrscgsr]

If you grind your welds you are a grinder not a weldor. That's all I have to say about that.

[jrscgsr]

Shop I used to work at was on the airports airfield. Never had an issue.

[jrscgsr]

Weld them right on no problem, just need a little JB weld

[jrscgsr]

Your hardened 440c is very likely to crack if you weld it. The heat treat will be gone in the area you weld as the arc from welding will be in the 2500 degree range.
The filler I think your talking about using is silicon bronze and has a low melting point and is very ductile. If you weld the...

[jrscgsr]

Only use the water cooled torch with a water cooler filled with coolant. If you run a water cooled torch dry it will almost instantly burn the water line when you weld. The power cable runs down the inside of the water cooler hose.

[jrscgsr]

It will run fine without the water cooled torch. In fact with a water cooled torch and high frequency you can have the high frequency travel down the water in the torch and bleed out causing issues, should be using low conductivity coolant anyways with one though.
Save yourself the money and...

[jrscgsr]

Since he is using tig not mig, set your amps high enough to weld the thicker material, you will aim your arc slightly more at the thicker material (although they are both thin) and using your foot pedal use just enough amps to get good fusion but not blow through. Always weld to the size of the thinnest...