I just bought a Freud blade that says it is made with Titanium Carbide,
rather than tungsten carbide. I did a google search and found it does
exist, but information is spotty. Is this actually something new, or just a
meaningless marketing scheme?
Don't know about its use in a cutting edge, but it SHOULD be a doozy.
I worked in a die shop and TC was the plating we used when TN was not up
to the job.
Googling for "titanium carbide" produced this as the second entry:
Not new, but not just marketing stuff either.
Carbide, all by itself, isn't all that useful. It can be used as a
lapping compound (not quite as hard as diamond but pretty close). But,
it doesn't look metalic or stick together like you see on saw blades
and router bits. All by itself it's an extremely brittle crumbly
The titanium, tungsten, cobalt, chromium, etc. are referred to as the
"binder" and are used to "glue" the carbide grains together.
Essentially, powdered carbide is mixed with the powdered metal binder.
They are then subjected to extreme heat and pressure. The result is
the familiar metallic thing we are all accustomed to seeing on the tips
of saw blades or router bits. It gets sharpened with a diamond wheel.
Different grades of carbide are created using different ratios of
carbide to binder, various sizes of carbide grains, different pressures
and temperatures, and other additives. In general carbides range from
extremely hard and wear resistant (but brittle): ISO class C1, to
extremely impact resistant (but soft): ISO class C8. Most woodworking
tools use C2 and C3 carbides. These are also suitable for working soft
non-ferrous metals (aluminum, copper, brass, etc.) and cast iron. C6
and C7 grades are most often used for machining ferrous metals (steel).
Grades C7 C8 get used for masonry (rock drilling, etc.).
Titanium is just a different binder than tungsten. It shouldn't be
confused with the coating which is often put on cutting tools.
Titanium Nitride is the vapor deposited coating with the gold
appearance. It makes the surface very hard and very smooth. It is
just a surface treatment, not part of the carbide. It can be applied
to steel, cast iron, etc.
Hop it helps.
Thanks for the corrections. You are absolutely right. A while back
(1999) I did a whole bunch of research on this topic (Micro-100 is
about two miles from my home). I ended up posting a summary in an
article here in the wreck:
When I typed this response it was off the top of my head, trying to
remember things that I learned 7 years ago. I just should have looked
up the old message and posted a link. Thanks for putting the info
J. Clarke wrote:
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