to restate my question:
is there any way to braze with tig, with any gas, or rod combination that anyone has had good experiences with?


not limited to brass rod anymore like my original question was...


Modified by dfoxengr at 1:05 PM 6/15/2007

 

I haven't done it personally, I have seen it done with about half the amps you would use to normally weld the metal.

 

nope. it pretty much explodes before the basemetal is hot enough to accept it. I once came upon a brazing rod mixed in with my silly bronze. I got curious and tried turning the amps down and down and down and down. It's a no go.

 

any one else?

 

it's possible, but you will get a lot of porosity.

 

I've done it but it does not like it. It tries to pop at the heat. In a pinch I have used it but be prepared to trash a piece of tungsten.

 

yes, its possible, but if your not really good at brass, then Id say no, its not possible. Your better off using the flux coated rod. You can use silver solder if you want. It just depends on what your welding.

 

you can go old skool and O/A weld it

 

yeah i like oxy but dont have a setup yet. i was just curious if this would work.

 

been doing more research on tig brazing, and im getting mixed reults all over the place.

can anyone else shed some light?

 

There is no light to shed. You can do it with the TIG. You will have a very hard time and it tries to pop under the heat.

The proper method is using Oxy-Fuel with a flux based brazing rod.

Not sure what other information you are looking for.

 

like ive said, im decent with oxy brazing

but the stuff i was reading on some other forums was saying that different rod, other copper based rods have good results. nowhere else was i reading about it popping since you can control heat and put less into it.

just because youve had problems with it doesnt mean theres not another way to braze with tig. so im asking if anyone else knows anything.

to restate my question:
is there any way to braze with tig, with any gas, or rod combination that anyone has had good experiences with?


Modified by dfoxengr at 1:17 PM 6/15/2007

 

I'm sure you could do it, you just have to play with the process. Maybe you have to preheat the base metal with a propane torch or something? I'm sure you could make it work. But really, a pony rig of Oxy/Acetylene is like 85 bucks, spring for it man.

What do you need to braze? Steel, cast, and what type of application? Just trying to understand your motives i guess.

 

yeah ive been meaning to get an oxy setup for about 2 years now, but i want 80 cu ft bottles, and a victor torch kit, so thats like 500$ total, lol.

i dont need to braze anything, but you never know when you could use it.
anyways, i really like having multiple ways of accomplishing the same thing because i hate saying, oh i wish i couldve done that instead. and i like the advantages of brazing such as small HAZ most importantly. its different and not many use it so i also like that aspect

i also think that it would come in handy affixing zinc coated fasteners as captive without disctorting the zinc as much as tig does, and without cleaning it off.

but most of all i just like learning new stuff, thats it. so theres really no need that anyone responding should get angry that i want to know, but thats just how this forum has been for the last few years.

 

get this kit. Ive used it for almost 4 years. I picked mine up for $200 basically new.

http://www.jcwhitney.com/autop...18530

Id recommend if you plan on doing stuff that needs brazing. Doesn't cost that much, and works great.

good luck

 

Fox,

Jump on craigslist there's always somoene that pops up with a nice torch kit and bottles that's had them for a bit, thought they would use it and now needs to get rid of it. Especially out in farm country.
I bought a victor torch setup, bottles, etc years ago and have gotten tons of use out of it. Paid maybe 300-350 total. I then saw one with larger bottles and a few more tips, longer hose and a hose reel for less than 200 on craigslist. oops. Thought I would pass that along.
You'll use the setup for alot more than welding. Trust me.

--Niles

 

honestly i dont want a 10/20 cuft tank that will only last a few hours.

and everyones missing the point that i dont really need to braze stuff hardly ever, i just like to knw different ways of doing stuff.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dfoxengr &raquo;</TD></TR><TR><TD CLASS="quote">honestly i dont want a 10/20 cuft tank that will only last a few hours.

and everyones missing the point that i dont really need to braze stuff hardly ever, i just like to knw different ways of doing stuff.</TD></TR></TABLE>

If it isn't something you'll do a lot, but you know you'll do it periodically, that kit would be nice to have around.

But good luck ne-ways

 

i looked into one of them years ago and theyre not worth the money, for the time they last, plus refils on those bottles are almost as much as refils on bigger bottles, so again, not worth it at all, and if you do any cutting with them, they drain the oxygen tank very quickly. welding shop guy basically told me its worthless uness you need to like take it up high in a building or on a roof or something and use it for only a few minutes.

 

i just set my machine up to weld steel, got a brass brazing rod, started a puddle and layed a bead........ i thought it was pretty easy personally.

 

ok so how did it turn out. no popping? can you post a pic of the front and back of the braze, butt joint preferrably?

thanks

 

this was just laying a bead on a brass fitting, but i will do some but welds (if i can) and take some pics tomorow. i dont remember it popping but the puddle was kind of deceiving looking........... it looked like it wasnt a puddle while welding IIRC.

 

thanks, and i remember when i did some OA brazing that it didnt look like a normal tig puddle so thats ok.

 

If there is no brass on it then you can silicon bronze it with a heli-arc. Like this.

 

ok so silicon bronze with argon atmosphere?
that can join dissimilar metals as well and requires less heat, another form of brazing correct?