The submerged arc welding process (SAW) is used
to fuse metal pieces by producing an electric arc between an electrode wire with continuous wire feed and a base metal
. The electric arc is produced beneath a layer of granular flux which is laid down on the joint to be welded.
Where do you use submerged arc welding?
Submerged arc welding is commonly used in
industries where thick steel sheets are involved or where long welds are required
. The process consists in creating a welded joint between steel components using an electric arc submerged beneath a layer of powdered flux.
What is submerged arc welding suitable for?
Submerged arc welding is ideally suited to
the longitudinal and circumferential butt welds required for the manufacture of line pipe and pressure vessels
. … Fillet joints may also be produced, welding in either the flat or horizontal-vertical (PB) positions.
What is the main purpose of submerged arc flux?
The functions of the flux are:
to assist arc striking and stability
.
to form a slag that will protect and shape the weld bead
.
to form a gas shield
to protect the molten filler metal being projected across the arc gap.
Why is it called submerged arc welding?
Submerged arc welding (SAW) is so named
because the weld and arc zone are submerged beneath a blanket of flux
. The flux material becomes conductive when it is molten, creating a path for the current to pass between the electrode and the workpiece.
What is process of submerged arc welding?
Submerged Arc Welding (SAW) is
a joining process that involves the formation of an electric arc between a continuously fed electrode and the workpiece to be welded
. A blanket of powdered flux surrounds and covers the arc and, when molten, provides electrical conduction between the metal to be joined and the electrode.
What is the difference between arc welding and submerged arc welding?
Submerged Arc Welding, also known as SAW, is the process that involves the formation of an arc by electrodes. … The difference between submerged arc welding and regular arc welding is
that the welding wire, arc, and weld joint are covered by a layer of flux.
What flux is used in submerged arc welding?
The molten weld and the arc zone are protected from atmospheric contamination by being “submerged” under a blanket of
granular fusible flux consisting of lime, silica, manganese oxide, calcium fluoride, and other compounds
.
Is submerged arc welding automatic?
Submerged arc welding may
be fully automatic or semi-automatic
. The arc is flat and is maintained between the end of a bare wire electrode and the weld. The electrode is constantly fed into the arc as it is melted.
Which one of the following characteristics is true for submerged arc welding?
Which one of the following characteristics are true for Submerged Arc welding?
Electrode: non-consumable; Thermal insulator: flux
; Welding rate: low; Suitability: thick plate. Electrode: consumable; Thermal insulator: flux; Welding rate: high, Suitability: thick plate.
What is the limitation of submerged arc welding?
The submerged arc welding process is a limited-position welding process. The welding positions are limited
because the large pool of molten metal and the slag are very fluid and will tend to run out of the joint
.
Is code for submerged arc welding?
IS 4353
: Submerged Arc Welding of Mild Steel and Low Alloy Steels – Recommendations.
What are the 3 functions of flux?
In soldering of metals, flux serves a threefold purpose: it
removes any oxidized metal from the surfaces to be soldered
, seals out air thus preventing further oxidation, and by facilitating amalgamation improves wetting characteristics of the liquid solder.
Does welding melt metal?
Joining Metals
As opposed to brazing and soldering, which do not melt the base metal, welding is
a high heat process which melts the base material
. Typically with the addition of a filler material. … Pressure can also be used to produce a weld, either alongside the heat or by itself.
What causes distortion in welding?
Distortion in a weld results from
the expansion and contraction of the weld metal and adjacent base metal during the heating and cooling cycle of the welding process
. Doing all welding on one side of a part will cause much more distortion than if the welds are alternated from one side to the other.
