How SPATTER CURE SC-07
is different from other available anti-spatter compounds ?
Welding
Sequence
Metallurgical
Aspects
Test
Results
How SPATTER CURE SC-07 is different from other available anti-spatter
compounds ?
Other anti-spatter compounds
are there in the market. And this makes us even more responsible
to educate you about the novelty of the compound SPATTER CURE
SC-07. Below is a comparative analysis of the same:
| OTHER
ANTI-SPATTER COMPOUNDS
|
SPATTER
CURE SC-07
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Welding Sequence
The Spatter Cure SC-07 is applied with the help of a hair bass
before welding in different kind of Welding
Techniques including:
# Manual Arc,
# Mig,
# Argon,
# Co2 welding etc.,
for any kind of ferrous material ,including MS, SS, CS and other
alloy steels.
The spatter Cure SC-07 is perfectly suitable for fabrication
of vessels, tanks, pipelines boilers, industrial equipments,
fabricated gears pinions, etc.
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Metallurgical Aspects
- The steel contains 0.01 to 0.02 %
oxygen. The oxygen content in the weld metal is as much
as 0.2 to 0.3%.Excess O2 has an adverse effect on the
mechanical properties of the weld metal, specially impact
Strength,besides formation of more FeO.
- O2 contents in the weld metal varies
with arc length, welding current and the type of shielding
employed. The coating of the eloctrode promotes a shield
of slag that is not adequate, even with standard quality
of electrode, to have lower level of oxygen in the metal.
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The
contact of air with the weld pool may also increase
the nitrogen contents in the weld metal and that
is very harmful. In open arc welding, the weld metal
may contain as much as 0.12 to 0.18 % N2 while the
parent metal contains 0.001 to 0.008% N2 only. These
gaseous inclusions are responsible to bring down
the impact strength of the weld metal which in turn
causes weld failure.
- The
coating of Spatter Cure SC-07 in the V-groove helps
to remove these problems. In the weld pool, the
coating acts as a flux and thus when the arc is
formed, this coating develops a film over the weld
metal protecting it from the surrounding air which
is by and large very active and hence the possiblity
of weld metal to come in contact with oxygen and
nitrogen of surrounding areas is minimized. Thus,
it helps to get a clean an dense weld with improved
mechanical and metallurgical properties. |
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Refinement
of Weld Metal
Apart from protecting the weld pool from the ambient atmosphere
the coating (here it acts as a flux) partly removes oxygen from
the molten metal due to the De-Oxiders included in the composition.
The oxides being lighter than metal formed by de-oxidation of
the weld pool floats up and is removed alongwith molten slag.
The Spatter Cure SC-07 helps to refine the weld metal also and
improves the mechanical properties.
Slag, formed over the weld pool does not stick to the surface
and so easily removed .More depth of penetration is another
achievement.
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Test Results
Comprehensive
Test Result with and without a coating of SPATTER CURE
SC-07
Material
Specification- Filler Material |
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A.
MECHANICAL TEST
Test
Bar
Load applied
UTS |
- 18 mm * 16 mm
- 16,000 kg
- 55,55 Kg/mm2 |
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Location
& Failure
Without
Coating
With Coating |
- Just near the welding joint
- Out of weld joint |
Bend
Test(QW - 160) at 2T Radius
Without
Coating
With Coating |
- Minor crack at centre of the periphery
- No crack was visible |
B. RADIOGRAPHIC TEST
Technique
Source to Film destance
Film Used
Material Thickness
Penetrometer
Intensifying Screen
Exposure time |
-DWSI
-10 cm
-NDT -65
-16 mm
-DIN -10-16
- Front - 0.01, Back 0.015
- 5 min |
The
test result seems to be consistent with a coating
of Spatter Cure SC-07
* No Defect
C.
MECHANICAL TEST OF WELDED PRODUCT
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