WITH SINTERIZED TUNGSTEN CARBIDE PARTICLES ON A BRONZE-NICKEL CORE FOR OXYFUEL GAS TORCH
Vilchis Pefor-Bar, is a welding rod consisting on a special
structure so as to achieve filler metal deposits, which are tungsten
carbide inserts with a non ferrous core, on cast iron and on copper
alloys as well as on steel. The core metal alloy is copper nickel to
ensure that the tungsten carbide particles stick onto the part undergoing
cladding. This results in excellent torsion resistance which averts
that the tungsten carbide starts scaling while drilling and it guarantees
the tungsten carbide remains bonded onto the part. This welding rod
is used to clad drilling bits in oil drilling equipment and excavation
equipment parts, bucket claws, mill stabilizers and, in general, to
clad those rotary tools used in drilling operations. This product has
excellent abrasion resistance; it is extremely hard and also, it withstands
huge impact loads.
CHARACTERISTICS AND PROCEDURE: This is a welding
rod for hard cladding which consists on a bronze-nickel alloy with tungsten
It is used on parts which are submitted to intense abrasion wear. Its
tungsten carbide filler metal deposits are easy to apply with an oxyfuel
The size of the tungsten carbide particles may vary according to the
specific needs of a job.
Tungsten carbide is one of the hardest materials you can ever get. It
is almost as hard as diamond. .
This welding rod is applied with an oxyfuel torch and an oxidizing flame.
There is no need to use flux since the tungsten carbide particles are
easy to apply. However, best results are achieved by first preparing
the surface with VILCHIS 11FC, using flux, specially when you
are going to apply small mesh PERFOR - BAR.
Clean and degrease the surface to be clad for optimal results. Prepare
the surface with a thin layer from VILCHIS 11FC (tin-based
pre-coating). This welding rod has a composition which is similar to
the core metal used to make PERFOR - BAR. There is no need to
remove the flux residues.
Set the gas torch to a neutral flame. Heat the surface you are going
to clad. If you have precoated the part with VILCHIS 11FC (tin-based
coating), let this coating melt dowm first. Point the flame towards
the PERFOR - BAR welding rod to let the core metal flow. Let the tungsten
carbide fall onto the surface you want to clad. Distribute the particles
according to your specific needs. This distribution should be accomplished
with the outer part of the flame to avert overheating the carbides.
Make sure you do not use the inner flame cone, to avoid overheating.