Boron Carbide Coatings

Darrell, I will certainly post pictures of the latest new good stuff as soon as it arrives. We expected them yesterday but sending stuff to small town Montana usually takes an extra day or two! No such thing as overnight.
 
Thanks again for the great info, Darrell.

Rob,
Can't wait to see what you're cooking up now. ;):D
 
As promised, here is another after picture of the blades recieved today. They are of the above tanto design. The top is the standard Tiger Stripe, and the lower is a "Night" version, it dosent look like it but the lower blade is completely coated!
 

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Sweet, Rob. Well done. :)

Can the boron carbide coating be applied to an existing knife with permanently affixed handle slabs?
 
Bronco there is no way to coat a knife with the slabs mounted to the blade. They would have to be removed prior to coating.You could remove them and after coating rivet them on again.

Darrell Lewis
 
Louis I don't recall seeing a Email from you last week I tried to answer all my Emails during my visit to Bodycote in North Carolina but don't remember yours. If you can send it again or Email me your phone number I'll call.


Darrell Lewis
 
One thing that needs to be addressed Boron Carbide coatings
are deposited in a vacuum chamber and all parts must be free
of all Heat Treat Oxides and scale and rust prior to coating.
They can be removed by either polishing prior to coating
or sand blasting.

Darrell Lewis
Dlewis@bodycote-na.com



YOU MAKE IT FIRST-WE MAKE IT LAST
 
Darrell,
When doing a folder blade that has been finished and ready to put in the handle, does the boron coating change the pivot pin holes and threaded holes? How much is 2 mils in thousandths of an inch, .002?
Does the coating adhere better to a hand sanded finish or one using a polishing compound? The double coatings of boron and chromium would add how much more to the cost of a blade?
This has been a very good thread for me as one of the reasons that some don't want a high carbon steel blade is because of the rust factor. This would probably be more stain proof than most stainless steels if I have been following it correctly.
You can email me some prices for some of the coatings if you wish. It will probably be next summer before I start on folders again.
Thanks.
 
Raker
The Boron Carbide is only two Microns, a micron equals
40 millionths of inch.So their is no need to make holes
oversized and the coating doesn't effect the PD of
a threaded hole. Our coatings bond well to all surface
finishes Sand Blasted, Mirror Polished or Satin
whatever finish you like we can coat with no problem.

If someone is looking for both wear and corrosion make sure
you request a multi-layer of both Chromium and Boron Carbide
for best protection. The cost for multi-layered coatings are
a small additional charge.

Darrell Lewis

YOU MAKE IT FIRST-WE MAEK IT LAST
 
Darrell,

I was at Nordic Knives and saw a William Henry T12-CF with a boron carbide treated blade. They were calling it a "Black Diamond" referring to carbide's hardness as compared to Diamond, but also to the jewel like appearance of the finish. There was an incredibly smooth and shiny surface. When applied to other blades that are finished differently from the WH, like a small Sebenza from Chris Reeve with the "stonewashed" finish, would you get a black, stonewashed type finish, or would it become shiny as well? I understand that your coating is only 2 microns thick, and I know how the "stonewashing" is done, but am not sure how small the markings left by the stonewashing tumbling media are. Would the blade need special polishing to get that black mirror look?

Just curious as I think a BC blade offset by the Sebenza's grey Titanium scales would look mighty sharp indeed (pun intended). It would almost look like a knife in a Tux.

jmx
 
JMX,The William Henry "Black Diamond" knife blade is polished
prior to Bodycote receiving the blades.Our coating process
will duplicate your finish.So you would have to have the
Sebenza polished before coating to achieve that look.

Darrell Lewis
 
Thanks for all the information Darrel....very helpful!!


"Hunters seek what they [WANT].., Seekers hunt what they [NEED]"
 
Darrel,

In a conversation with Larry Chew a few years ago, he was telling me that the barrier to corrosion resistance with the PVD coatings was the grain boundaries, at the time, he felt that an amorphous diamond coating might be the best?

Your thoughts?
 
Marion,

Larry Chew is correct in stating that a PVD Amorophous grown
flim is better at corrosion resistance. The key is to deposit
either a single layer or multi-layered coating without voids or
pin holes in the film. Our Boron Carbide coating deposited is
Amorphous but rust or corrosion can still grow from the cutting
edge under the film. One thing Bodycote is working on is a supper
lattice coating with Chromium and Boron Carbide stacked at
least 30 layers thick yet only 2 microns total.

I have been addressing the problem of corrosion with one of our
sister companies K-Tech which has ceramic coatings for off shore
oil drilling for corrosion. Their process fills all the voids and
provides a totally sealed off film. I should have results soon Strider
and MOD have been testing Boron Carbide with Tech-12 on top and
it should pass 2000 hours of salt spray.
I'll keep everyone posted.

Darrell Lewis
 
Below is the address to Bodycote's K-tech Ceramic's coating
division,when Boron Carbide is piggy backed with Tech-23 or
one of their chemically formed coatings,corrosion is eliminated.
This family of coatings were developed of off shore and down
hole oil drilling.

The combination of both coatings exhibit both excellence wear and
corrosion when exposed to extreme environments such as salts or
Acids. These two coatings when combined are some what expensive
and are not for everyone.For more information about K-tech here
is the Web Address WWW.ktech-ceramics.com

Darrell Lewis
Dlewis@bodycote-na.com

WWW.Bodycote-na.com
WWW.ktech-ceramics.com
 
Darrell,

Thank you for your quick response.

It sounds as if you have some good solutions, I am sure we will be in contact in the future.
 
Darrell,
If the coatings are in the 90 Rc area, would the back of the blade
chip if it were deformed by some action. A ding that would put a dimple in the steel, would the area peel or crack?
Tahnk you. Ray
 
Darrell,

raker2 brings up a very good question, can you expand on the characteristics of the coating under abusive situations? Say, when a knife is being driven through a wood pole with a wood baton, or any other situations you have experience?

when Boron Carbide is piggy backed with Tech-23 or
one of their chemically formed coatings,corrosion is eliminated.
Click to expand...

How expensive for a single blade? I ask, becuase I have a knife in the works, to which I may want to have this applied.

Is the treatment chemically inert when completed, specifically, when it comes to food preperation?

Who would be the apropriate contact over at K-Tech?
 
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