Look at my welds. Help.

[Donald Branscom]

That was what I was looking for thank you. I tried the wire brush on the cup but not much luck. Any good way for cleaning the inside, like can I take it off an soak it in anything?

Do not soak it in any chemicals.Of coarse a wire brush will NOT work.
Just take a box knife and cut it off the best you can and hope the ceramic does not get chipped. I would just replace it and consider it part of your educational cost.

[Vinnie]

What would happen if I changed this to DECP and used the neg for ground instead of the positive?

Neg electrode dude !!!!! Neg electrode dude !!!!! Neg electrode dude !!!!! Neg electrode dude !!!!!

Or ok try it seems thats what you want

Nuf said

Vinnie

[Gamble]

I remember all that, I'm reading the tig handbook from miller I got and it's talking about dcen and dcep, just wondering what happens if you reverse them.

[Vinnie]

Ok try it quit asking seems thats what you want "LOL"

Or do you need to be hand fed "OMG"

Vinnie

[Gamble]

Don't answer my questions if I'm a bother to you, geez. It's not that I wanted to try it, I was just curious if it would have any affect on it.

[sn0border88]

You can use a 3/32 tungsten from 5 amps up to 150. (Steel or stainless)
It will last longer that the 1/16 tungsten and be easier to sharpen.
From .049 thick metal and up you can use the 3/32 tungsten.

A 3/32 tungsten is good to ~250A DCEN and AC (though the latter depends heavily on balance and waveform.)

DCEP puts about 70% of the heat generated from the arc into the tungsten, meaning that your going to have a big molten blob of tungsten about as soon as you hit the pedal.

It can be useful for welding very thin sections of aluminum, but not much else as far as GTAW goes.

[B_C]

I would like to see you weld with a 3/32 tungsten with 250 amps on AC........lmao
Pictures PLEASE......

[B_C]

At 220 AC I almost blow off a 5/32 tungsten with a WP-18 torch........You must have a secret I don't know?
I know it says 150 - 250.........But I have never had much success using 3/32 at 250........

[SpeedyGlas]

yeah like he said the color is oxidation, when you see the blackish look its called carbide precipitation, this happens from overheating the material and carbides form in the metal and latch onto the chromium in the stainless and pulls it into the colder base metal leaving the weld susceptible to corrosion, according to my metallurgy book

[sn0border88]

At 220 AC I almost blow off a 5/32 tungsten with a WP-18 torch........You must have a secret I don't know?
I know it says 150 - 250.........But I have never had much success using 3/32 at 250........

I can run 3/32 ceriated wide open on a dynasty 200 all day, 120Hz 85% EN.

I also have used a dynasty 350 with 300A EN 250 EP and 90% EN on advanced squarewave using most of the pedal with no issues.

Works for me...?

[Vinnie]

Quote

I can run 3/32 ceriated wide open on a dynasty 200 all day, 120Hz 85% EN.

I also have used a dynasty 350 with 300A EN 250 EP and 90% EN on advanced squarewave using most of the pedal with no issues.

Works for me...?



Nope not all day with a 20% duty cycle wide open "LOL" only a small portion of the day.

Vinnie

[B_C]

Hmmmmmm must be the inverter technology? I switch over to 1/8" when the amps go much over 200..........Less chance of inclusion (tungsten spit off) I have a Lincoln 355 transformer machine......Can't wait to get the new Dynasty and see what
its like on AC

[B_C]

At 220 AC I almost blow off a 5/32 tungsten with a WP-18 torch........You must have a secret I don't know?
I know it says 150 - 250.........But I have never had much success using 3/32 at 250........

Typing error I meant to say 270 amps.......with the 5/32 tungsten

[B_C]

Video I made today........

[Tensaiteki]

yeah like he said the color is oxidation, when you see the blackish look its called carbide precipitation, this happens from overheating the material and carbides form in the metal and latch onto the chromium in the stainless and pulls it into the colder base metal leaving the weld susceptible to corrosion, according to my metallurgy book

The black is not carbide precipitation. Carbide precipitation is not visible to the naked eye or any normal camera. Any blackness on/near the welds is either oxidation (including 'sugaring') or the residue left by some form of contaminant.

[Gamble]

Pics of welds on angle iron.

[sn0border88]

Hmmmmmm must be the inverter technology? I switch over to 1/8" when the amps go much over 200..........Less chance of inclusion (tungsten spit off) I have a Lincoln 355 transformer machine......Can't wait to get the new Dynasty and see what
its like on AC

Huge difference on tungsten shape with inverters vs. transformers

I max at about 220A with the sycrowave 250, but even then I need to stop and grind the ball down every so often.

This is what the point looks like after welding around 230A with the dynasty 350, 3/32 ceriated.

[B_C]

Very trick I got my big check today so I'm going to order the Dynasty 350 the first of the week.....Can't wait.....

Thanks BC

[B_C]

I'm gonna pick your brain when it shows up for settings.......I'm sure it will be a whole new ball game with the inverter machine.....

[jakeru]

BC - I spent a few minutes trying to research what is the maximum EN% your square wave 355 machine is capable of (with the knob turned to max "Penetration" setting), including looking through the owner's manual for it, but I couldn't find this specification anywhere.

However if you are still running with the balance knob set at "Balanced" (as you mentioned previously) that would mean you're running with only 50% EN. If you set your AC Balance more towards the "penetration" side, it would help take some heat off your tungsten and possibly allow using a smaller tungsten size.

[B_C]

Yep, I know this. I usually run the wave balance toward or at
The pen. Side. The tig 355 will put out 400 amps on the high side
I have never needed that much power or have a torch that will
Be happy at 400 amps.