Lincoln 350mp/ Silicon bronze

[mckutzy]

Working on a job with silicon bronze wire(.035), brazing a SS rod nut to inside copper pipe(3").

For this machine PRG. 32, 180(feed)/.50trim.
100%Argon.(these are the best last settings I'm using)

Problem is with a wondering arc, causing a flaring, partly melting the nut.
Sometimes it just arcs at the end of the wire others, it's all over the place...
It needs just 2 good beads to hold.

I tried all sorts of things... But I don't know...
This is something of a new thing using bronze..
I posted here as I reckoned it might be a machine specific question...

[Capt B]

I have a 350mp but don't use silicon bronze with it. Hopefully, someone else will be able to help. I always pay attention to any post on them can learn a lot from others on here.

[mckutzy]

Thanks...
I'll have a few others soon...
Working at a new job...
This are similar settings to the info one of the other welders had jotted down... But I'm not getting it to wet out right...
Just mainly getting a big flare like a baby ground tungsten..

They want a speedy job done... Otherwise I'd be already using a tig or O/A for this...

[ccawgc]

Call Lincoln tech support and talk to a process tech. they should be able to help you.
Call first thing in the morning. 888-935-3877

[OPUS FERRO]

mckutzy

. . . Hopefully,someone else will be able to help. I always pay
attention to any post on them can learn a lot from others on
here.

Working on a job with silicon bronze wire(.035), brazing a SS
rod nut to inside copper pipe(3") . . .

Your post is rife - with technical, and experiential confusions . . .

To short-cut an answer - specifically, what materials you are
trying to join . . .

e.g.

S/S to Copper/Bronze alloys can be Silver Brazed and Bi-metallic
welded . . . but . . . not brazed with Sil-B . . .

Not commonly known - S/S does form an oxide - that must be
removed for success - regardless of the Bi-metallic process . . .

This is the limit of my suggestions . . .

What are your 'pieces/parts' - and you may get an answer . . .
from - the Lurking Wizards . . .

hth


Opus



.

[mckutzy]

Ok fare enough...
A copper pipe, inside with 3 rod nuts(18-8 SS) joined using sil/bronze wire, with the MIG welding process.

Sorry... I thought the term was still brazing, as in mig brazing.

[propanehotrod]

If the arc is wandering you might try turning up the feed rate.

[samhop]

i have not brazed copper bk the melting point of copper is to low 1980 and bronze 1900