Removing brazing

[oneadam12]

Anyone got any suggestions for removing brazing from stamped parts? Got a couple brazed up pieces I want to separate.

It's yellow brazing, on steel, tried a wire wheel with little result. Stuff is pretty hard to file, ground off what I could but contemplating acetylene to deal with the rest. Guessing it's a bronze filler.

 

[trevj]

If they are still together, heat with a torch until they are not.

While hot, you can wipe much of the braze off, the rest will be either abrasive paper or files, sharp files. New, not been used for anything else, or you pretty much turn it into a frustration exercise.

 

[marshall]

And if you are going to try welding it back together again, you have to get all the brass off as weld will not stick.

 

[Meroh]

If they are still together, heat with a torch until they are not.

While hot, you can wipe much of the braze off, the rest will be either abrasive paper or files, sharp files. New, not been used for anything else, or you pretty much turn it into a frustration exercise.

Agree this is the best way.

And if you are going to try welding it back together again, you have to get all the brass off as weld will not stick.

While still hot; brush with a small new stainless steel wire brush to displace the melted bronze. The more you get off, the less you have to file and sand; darn stuff is tougher than a boiled owl.

 

[oneadam12]

Update: O/A brazing tip works great for this, until you run out of O2. Wire wheel on the bench grinder on standby when it just starts to flow.

Try tomorrow with propane, might be done until I air up again if it's not hot enough.

 

[marshall]

if it is a small part, maybe, if you are going to power wire wheel with molten brass, you will have to be real careful, welding smock, full face shield, etc.
What part are you working on?

 

[oneadam12]

Propane wasn't enough. And yes, PPE mandatory. Somebody brazed some magazine bodies together, no idea why, but can't tip the follower out.

 

[marshall]

They could be over capacity mags that have a block in them and then brazed so you can't take the block out, as perC68.
Thou I don't know why brass.

 

[oneadam12]

They could be over capacity mags that have a block in them and then brazed so you can't take the block out, as perC68.
Thou I don't know why brass.

Acutely aware of the issues around that, won't be a concern. Was done ages ago, way before C-68, probably because the bottom plates were just sliding out looking at some of the gaps on them.

Hardly worth doing, but that's why it's a hobby.