Hello group.
Long time lurker, first time poster here. I’m relatively new to
jewelry making as far as hours of experience, just a few hours a week
over the last year. Enough rambling, now the issue. I am having a
heck of a time sweat soldering an overlay. I have searched the forum
for ideas on how to solder an overlay before I atempted it, and now I
have a question. Here is a link of some pictures of the bracelet
coming apart after a solder atempt,
I was able to pull top off without any damage, it was apparently not
soldered, not even close. Here is what I did:
I created filings of hard solder.
Sprinkled them on the surface that was covered in Handy Flux. This
was the top piece.
Heated the SS until I saw the solder flash. Actually, I never saw it
flash, I just saw molten metal as I was heating the ends. Couldn’t
tell what was happening in the middle, but it seemed to melt there as
well.
I then pickled the pieces and setup for the join by fluxing the top
and bottom.
I placed the top piece face down. I wasn’t convinced that I had
enough solder, so I added some more filings.
I placed the bottom (uncut) piece on top of the upside down top
piece. I heated and heated and heated…
I am using generic smith little torch with a number 6 tip and
propane/oxy fuel. The piece is roughly 1 inch by 6 inches. I cranked
up the fuel pretty high and proceded to heat. I spent a good minute
getting it to temperature. When it looked like it was at the right
tempurature, I used the side of my solder pick to press the back
plate down onto the top plate. I spent a good three minutes going
back and forth over the piece, pressing with the side of the solder
pick (not the point). Correct me if I’m wrong, but I think this is
too much time. Does it matter that I was heating on top of a
magnesium block? The pieces weren’t perfectly flat and 100% in
contact, but I think close enough. Even if they are perfectly flat
before adding solder, they won’t be in perfect contact after one
side gets solder, since the solder would produce high/low spots. So,
how do you create a good solid contact surface for soldering a fairly
large overlay? I was thinking of sandwiching the bracelet between
two steel plates and heating it in the kiln, but I haven’t read about
that in the forum, so I think it’s overkill. Any help is
appreciated. I live in Houston, TX and would be interested in finding
a mentor.
Thank you
Kelly