My name is Fred, and I am a bladesmith, as opposed to a jeweler. I am
trying to branch out/up in my making of furniture ( ,that is,
fittings such as handles, guards, pommels, ect. on knifes and swords
). In particular I am working towards setting of stones. Currently, I
am starting out with Alloy 510 Phosper Bronze to try and make some
fittings. I am starting out with this alloy because is seems to be a
cheap metal to learn with as opposed to gold and silver, and I have
around 500 lbs of the stuff seating in my shop in every conceivable
form ( sheet, wire, bar stock, hex stock, … ).
The current problem I am having is with soldering. Typically, in my
work, when soldering/brazing/welding one starts with an oversized
piece, does the hot work, and then grinds off the scale and other
crud. I finding that working with the smaller material presents a
problem there is not enough meat to grind off. In particular, when
soldering the phosper bronze sheet and wire, as you can not grind it
when done. What I am trying to get rid of is a copper bleed through
from the base material. I not sure if this is the tin being burnt out
of the bronze, or the copper in the bronze coming to the surface due
to the heat. I am using Safety-Sil 45 silver solder ( 45% Ag, 30% CU,
25% Zn ) from J.W.Harris welding supply company ( a good color match,
1370 F solder ) with their recommended brazing flux ( Whit Stay-Silv
Flux ). I am using a rich flame on the O-A torch. It is not the
solder joint that is the problem, per se, but the surrounding
material. I was told by a gentleman on the sword forum ( same as this,
but for bladesmiths ) that jeweler run into this same problem all the
time and use a solution of spharex, sulfuric acid, boric acid, and
hydrogen peroxide to pickle the copper out.
Is the correct solution?
What is spharex, where can I get it? I have done web searches to
Any hints on setting stones? I have broken the last three when I
have hammered down the bezel.
Thank’s, Fred ( @JYBlood ).