KFWELD exothermic welding powder can be used to restore metal
compounds and a certain percentage of the reduction of substances,
and made by a special process. All products through the China
National Nonferrous Metals Research Institute test center
monitoring, product quality comparable to the well-known
manufacturers of products, supporting KFWELD mold and accessories,
to meet all the copper, copper clad steel materials, steel
grounding welding requirements. Each bag welding powder standard
with a bag ignition powder and disc steel plate.
1.KFWELD welding powder is a non-dangerous goods, the use of sealed
waterproof design, solder powder does not contain phosphorus,
magnesium and other harmful materials on the human body to
facilitate transport and storage.
2. Product performance and stability, low porosity, in strict
accordance with the construction process, can ensure that the
solder porosity <1%.
3. Welding different types, specifications of metal quality, such
as welding, according to different materials to provide different
formulations of the solder powder, and according to different ways
to provide accurate component packaging, through the reaction
temperature and speed control, adjust the solder element
composition and Ratio, so as to achieve the best welding
performance, in the full guarantee of the quality of welding under
the premise of the degree of standardization, not only to minimize
the damage to the metal base metal damage, but also greatly improve
the service life of the mold.
4. Welding powder reaction is full, very little solder impurities,
solder joint conductivity and corrosion resistance is extremely
Exothermic welding powder specification:
|Part No.||Specification||Part No.||Specification|
Exothermic welding operation process:
1. Clean the joint of the mold and the welded conductor and place
the welded conductor at the central position of the mold cavity;
2. Close the mold and arrange a metal protective ring at the bottom
of the mold smelting furnace;
3. Pour in the hot fusion welding and spray pyrophoric powder on
the surface, to the mold mouth, of the flux;
4. Cover the mould cover and ignite the pyrophoric powder at the
mould mouth by using a burning torch;
5. The hot fusion melting flux is subjected to high temperature
reaction in the mould after being ignited;
6. Open the mould after natural cooling when the reaction is
Matters Needing Attention:
1. Unrelated person should not stay within 1.5 meters away from the
operation site during construction.
2. Inflammable goods should not be placed within 1.5 meters away
from the operation site during construction.
3. The operating personnel must put on heat-resisting working
4.The operating staff should not perform construction in front of
the mouth of melted mold.
5. The operating staff should be at least 1.5 meters away from the
melted mould immediately once the pyrophoric powder is ignited.
6. No one could contact the melted module directly after fusion
welding is finished.
7. The melted module and the welded wire are cooled for 30 seconds
after fusion welding is finished and then taken out by using a
8. Welded wire is subjected to insulation treatment only when the
wire is completely cooled.
Exothermic welding type:
Bar to bar, bar to ground rod, bar to steel surface, cable tp bar,
cable to cable, cable to ground rod, cable to re-bar, cable to
steel surface, cable to rail, bolt to steel surface, one-joint.
Exothermic welding feature:
1. Current carrying capability from welding point is same as
conductor with good conducting performance. After inspection, the
DC resistance ratio and change rate are almost zero before and
after welding. This is the level that any of the traditional
welding method cannot be compared.
2. No need of resources from outside. It can be operated indoor and
3. It won't be damaged by surge current. The test shows the
conductor will be melted earlier than welding points when under
high current impact in short period.
4. Corrosion or slack will not be produced from welding. As it is
weld junction,no contact surface, no residual stress, junction is
stable and reliable as long term conductive body.
5. As it is welding junction, connector and conductor are combined
on molecular.So it has a good mechanical strength and is a
6. Equipment is simple, convenient and handy. The operation is easy
and can be done.
KFWELD Electrical Technology Co., LTD
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