WE CLAIM:
1. An improved technique for cold wire addition, through an improved Feeder, in
Submerged are Welding Process, comprising the steps of:
- forming means for feeding additional cold wire, the means being formed by
modifying the existing wire feeder in the welding system, the modification
being incorporated by interfacing an integral shaft such that the additional
cold wire can be fed in both direction of welding;
- feeding two dissimilar wire combination one after the another via the single
wire feeder using two different nozzles, the two different nozzles drawing
power from a single power source (6); and
- creating a common weld pool wherein the flux created therein is analytically
neutral and which produces a weld metal structure with high proportion of a
acicular/martensetic structure wherein surface proportion of
acicular/martensetic is 100 percent.

2. The process as claimed claim 1, wherein the two nozzles draw power from the
single power source with parameters of 400 to 450 Amp, 25 to 30 volt, and
welding speed of 0.3 to 0.6 m / minute.
3. The process as claimed in any of the preceding claims, wherein a single pass
welding is performed.

4. The process as claimed in claim 1 or 3, wherein a multi layer pass welding is
performed to reduce the number of layers which enhances the mechanical
properties of the joint.
5. An improved cold wire feeding device in a submerged arc welding system,
comprising:

- a modified cold wire feeding means which incorporates an integrated shaft
(3) on the existing cold wire feeder (2);
- at least two nozzles (4,4) drawing power from a single power source (6)
with predetermined operating parameters; and
- a single common weld pool (5) created by feeding dissimilar wire
combination via the modified cold wire feeding means simultaneously in the
at least two nozzles(4).

ABSTARCT

AN IMPROVED TECHNIQUE FOR COLD WIRE ADDITION, THROUGH AN
IMPROVED FEEDER, IN SUBMERGED ARC WELDING PROCESS
The invention relates to an improved technique for cold wire addition, through an
improved feeder, in submerged arc welding process, comprising the steps of forming
means for feeding additional cold wire, the means being formed by modifying the
existing wire feeder in the welding system, the modification being incorporated by
interfacing an integral shaft such that the additional cold wire can be fed in both
direction of welding # feeding two dissimilar wire combination one after the another
via the single wire feeder using two different nozzles, the two different nozzles
drawing power from a single power source and creating a common weld pool wherein
the flux created therein is analytically neutral and which produces a weld metal
structure with high proportion of a acicular/martensetic structure wherein surface
proportion of acicular/martensetic is 100 percent.