Solid Carbon Fiber Knives

im kinda working on somthing simalar but with a thin layer of steel in the center where the edge is.
 
JTknives said:
im kinda working on somthing simalar but with a thin layer of steel in the center where the edge is.
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I'm working on that as well. The only one that I have finished has a glass core, but I'm working with probably 1/32" steel as well.
 
Kim Lau said:
Is it gonna be like this?. I've been waiting for Dan to make this :D
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Man, I thought I was a pioneer, and here it seems everyone is doing it! The only thing I don't like about this one is that the steel is at the end. I would rather sandwich it to keep it from separating. It is also a bit thin. My carbon fiber is actually 5/16" (not 1/4") multiplied by two scales, plus the thickness of the steel. I also plan on putting a few mosaic pins through it for stability. A similar-sized knife of mine would probably weight 2.5 oz or so.

God Bless,
Richard
 
Kim Lau said:
Is it gonna be like this?. I've been waiting for Dan to make this :D
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Or maybe like this? :cool:

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I must have been the first to inquire about a production run, because he gave me dibs on the #2 Ultralight. Lucky me! :D
 

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You guys are not alone...I am working on this also. I did one unsatisfactory try with a file earlier this year.

But now, I am using Talonite for the core and will press it all together and (if needed) reinforce with titanium pins.

If it works out, one of the first ones will go out in the Christmas Knife Exchange. That is assuming my recipient likes non-traditional stuff. If so I will work up something else.

Keep in mind that carbon fiber can be corrosive, If I remember right.
 
Mostly out of curiosity, what method of bonding the CF to the steel are you chaps using?
Stacy
 
bladsmth said:
Mostly out of curiosity, what method of bonding the CF to the steel are you chaps using?
Stacy
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I was wondering the same thing.


Holy crap, this is some cool stuff. I am going to have to try this. Even though CF costs more than steel. Probably faster to work though.
 
I like the idea too......I think it would be a big hit in the climbing community.
 
I can't speak for anyone else, but this is how I intend to go about making up steel core laminates. I have made one attempt. The core was too thick and therefore made it kind of pointless. All the laminate was ground away and it was for all intents and pruposes just another knife with laminate handles.:rolleyes:

My next attempt will be using either talonite or hardened steel as the core .

It will also be using a much thinner stock 1/32" to 1/16" (about .030" to .060")

I will prep the material and then press it up in a stack just like I were making a standard laminate:

Then grind away everything that does not look like a knife:)
(or send to another knifemaker to do so)

I would perhaps drill and pin the stack to add some mechanical bond in addition to the resins.

When using steel, I see using a hardened steel blank the full size of the knife.

With talonite I will try to economize a bit and use a piece that is about the length of the cutting edge and make up a composite spacer to make up the rest of the area between the "handle" pressing and around the talonite blank. Of course this can be done with stell for some weight savings.

There are a couple interesting options to consider:

Of course, any material and combination of materials can be used.

Use pattern welded steel, etch the heck out of it and laminate the cloth to only one side. Chisel grind on the laminate side.

I am still researching adhesives to use with talonite and stellite. I am concerned the natural lubricity may not perform well with the epoxies I am using. I have no concerns with my current epoxy and steel bonding well.

As I mentioned, carbon fiber is corrosive so should not be laid up in contact with steel. No such worries with the stellites and talonites.

Some types of CF is also electrically conductive. I have made flashlight bodies from it...like maglites, the body of the light makes up part of the electrical circuit. Don't assume that CF handles will insulate like a wood or fiberglass handle when cutting live wires, accidentally or otherwise

If anyone is interested in working with me, I am sure something very cool and useful can be made up. A WAG (wild ass guess) for cost would not be much more than what I charge for two pair of scales, with the knifemaker supplying the hardened steel blank.

PM or email me if you are interested and we can discuss options.

BTW, I am not really interested in making up non-metal intended to defeat metal detector kinda things, so don't bother inquiring about this.

Thanks, and I look forward to working with anyone or sharing ideas.

-Todd
 
fod said:
You guys are not alone...I am working on this also. I did one unsatisfactory try with a file earlier this year.

But now, I am using Talonite for the core and will press it all together and (if needed) reinforce with titanium pins.

If it works out, one of the first ones will go out in the Christmas Knife Exchange. That is assuming my recipient likes non-traditional stuff. If so I will work up something else.

Keep in mind that carbon fiber can be corrosive, If I remember right.
Click to expand...


I love non traditional stuff! I hope you draw me! :thumbup::D:p
 
You have twice mentioned that CF is corrosive????
As I recall, it is extremely Corrosion Resistant ,but I don't remember ever seeing anything about it being corrosive. It is,however, extremely abrasive, and can cause wear on metal parts contacting it. Is that what you are referring to?
Stacy

Added Note: CF is very similar to asbestos in character, and thus should be worked with great care. I would suggest an extremely good dust recovery system and cleanup of the grinding area. I don't use it now, but have in the past. It is not on my favorites list.
Stacy
 
bladsmth said:
You have twice mentioned that CF is corrosive????
As I recall, it is extremely Corrosion Resistant ,but I don't remember ever seeing anything about it being corrosive. It is,however, extremely abrasive, and can cause wear on metal parts contacting it. Is that what you are referring to?
Stacy

Added Note: CF is very similar to asbestos in character, and thus should be worked with great care. I would suggest an extremely good dust recovery system and cleanup of the grinding area. I don't use it now, but have in the past. It is not on my favorites list.
Stacy
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I could be mistaken (won't be the first time:foot:), I'll try to dig up where I found that info...it could have something to do with the high carbon content :)
 
bladsmth said:
You have twice mentioned that CF is corrosive????
As I recall, it is extremely Corrosion Resistant ,but I don't remember ever seeing anything about it being corrosive. It is,however, extremely abrasive, and can cause wear on metal parts contacting it. Is that what you are referring to?
Stacy

Added Note: CF is very similar to asbestos in character, and thus should be worked with great care. I would suggest an extremely good dust recovery system and cleanup of the grinding area. I don't use it now, but have in the past. It is not on my favorites list.
Stacy
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The process is called galvanic corrosion. When two materials with different galvanic constants are put in contact with an electrolyte, an electric circuit forms and one of the one with the lower galvanic constant corrodes. It's the same reason why you see a lot of corrosion where steel and copper plumbing is connected.

It really shouldn't be a problem with a laminated knife unless it spends a lot of time around salt water. In most high moisture applications where carbon fiber and steel are bonded together, a thin layer of fiberglass is between them.
 
Thanks.
Electrolytic action I could understand. If the CF was bonded with a resin ( as described) I don't see any real worry on a knife blade.
Stacy
 
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