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Oil Well Seal
This is a seal
on a drill head. It costs as much as half a million
dollars To pull up a drill string so it is Important that
parts hold up. In this case the customer wanted to use a
tungsten carbide ring for a seal.
Major Problems
1. Find a piece
of carbide seven inches across and no thicker than a nickel
that would be flat and level. Fortunately people at the
top end of an industry usually know each other so we could
find a supplier.
2. Braze
the part so that the thermal cycling and the differences in
coefficients of expansion wouldn't crack the carbide, warp
either part or leave gaps or weak points in the braze
joint.
We did the
original project with customer supplied parts. we did
the first parts a couple years ago. They are now in
service and delivering 10 to 20 times the life of previous
parts.
We can do this
with customer supplied parts or we can delivered finished
parts from drawings.
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Information |
Torch Braze Ceramic Saw Tips
There are many cermets and ceramics used in
mechanically held applications that could also work well in
brazed applications.
Major Problems
1. Tool tips are made to be wear and
corrosion resistant. The more they resist wear and
corrosion the harder it is to get braze alloy to bond
well.
2. There were previous methods of bonding
ceramics but they were very expensive because they required
special alloys, special equipment or both. In any
case the joints created were much too weak for use in tools
such as saw mills saws.
It took a while but we developed an inexpensive
treatment technology that allows us to braze cermets and
ceramics using the same alloys and equipment as are used for
tungsten carbide.
We now have a couple hundred customers using our
Cermet 2 advanced grades as well as others using true cermets
and even alumina.
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