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| malloy,elettrodi
saldatura,elettrodi per saldare,saldatura di riparazione e manutenzione,elettrodi
riparazione ghisa,saldatura ghisa,riparazione ghisa,elettrodi per
riparare acciai,saldatura di riparazione acciai,saldatura alluminio,riparazione
alluminio,brasatura,saldobrasatura,riparazione utensili,stampi,elettrodi
per rivestimenti duri,rivestimento duro,rivestimento resistente abrasione,rivestimento
resistente abrasione ed urti,rivestimenti anti usura,elettrodo da
taglio e foratura,pasta assorbi-calore,ridurre i costi di manutenzione |
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PRODUCTS for CAST
IRON |
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High
strength no-cracks, machinable electrode for cast Iron
Has an outstanding weldability on all types of cast iron,
even dirty or greasy, without preheating. It can also
welds cast iron to steel. Multi-passes can be done without
chipping slag . It has an exceptional elongation to avoid
cracks and breaks. Deposits are completely machinable,
cracks and porosity free, stronger than most cast iron.
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Product Details |
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Non-conductive
coating electrode for cast iron
It offers an outstanding weldability on all types of
cast iron, even dirty or greasy, without preheating.
Its non-conductive coating flux doesn't side arc allowing
welding in areas of difficult access. Multi-passes can
be done without chipping slag. It has an exceptional
elongation to avoid cracks and breaks. Welds are very
soft machinable, crack and porosity free.
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Special
electrode for burnt or very dirty cast iron
Has a high penetration and a fast freeze action to eliminate
undesirable effects of harmful contaminants like porosity
or low weldability. Ideal for repairing of cast irons
very dirty, oil and contaminants impregnated, or heat
oxidized as exhaust manifolds or parts of furnaces, etc.
Same color of cast iron. It allows cast iron to steel
joining. Welds are not machinable. If machinability is
required the final pass should be done with Malloy 771.
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Product Details |
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In the
past, CAST iron has always been difficult to be repaired
for all maintenance men. Typically it required:
| • heating slowly the pieces
in a big oven or with external flames. |
| • welding with ordinary
cast iron electrodes. |
| •cooling slowly the pieces
in the oven. |
| • and hope that the repaired
cast iron does not break again, but it happened often. |
Most welders even don’t attempt to weld cast iron
due to the low probability of success of these repairs. Breaks
and cracks that occur after welding are basically due to:
| • Base metal overheating,
generated by ordinary cast iron electrodes, which during
normal cooling lead to a formation of very hard areas
(iron carbides) and therefore fragile, and contractions
that cause cracking. |
| • Low elongation of normal
cast iron electrodes, not enough to compensate the contractions
which occur during cooling, causing a cracking of the
welding itself; |
| • Porosity caused by dirty
(oil, grease, paint and other contaminants) present in
the cast iron to be repaired. |
Fortunately, times have changed! Malloy
has developed a series of electrodes technologically advanced
to easily and reliably repair all cast iron: MALLOY
771, MALLOY 772, MALLOY 730.
MALLOY 771, MALLOY 772 are special electrodes
that features EASY OF APPLICATION, VERY
HIGH ELONGATION, and LOW AMPERAGE,
that means no overheating! They also provide welds completely
machinable, and possesses special elements in the coating
able to eliminate the harmful effects caused by grease, oil
and other chemicals contaminants. MALLOY 771,
besides welding all cast iron, it is able to weld cast iron
to steel. MALLOY 772 has a NOT CONDUCTIVE coating
that doesn't side arc if touching base metal, allowing to
access even restricted areas. MALLOY 730 is
an electrode for repairing works on very dirty (oil soaked)
or burnt cast iron. Its deposits are not machinable. With
these MALLOY special electrodes you can
easily and safely repair any piece of cast iron, without
having to dismantle and discard it or sending to a costly
external workshops for repairing.
This means SAVE TIME and MONEY! |
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| POLIMAT
- Via S.Michele, 188 - 41049 Sassuolo (MO) Italy - tel 0536
852085 - fax 0536 852085 - VAT 02604040366 - info@malloy.it |
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