Diffrent steel

farid.

farid.

Knife Maker
Joined
Oct 26, 2010
Messages
1,399
Hello members,

Just finished these two CPM-15v knives, just wanted to share the pics with you all, thanks for looking.
Farid


DSC06689.jpg

DSC06686.jpg

DSC06684.jpg
 
Awesome! The wear resistance is practically oozing out of those pictures. Can't wait to get mine in hand and see how it performs! :thumbup:
 
Those look like real user's ! I like the handle materials choice and colors too.

I'll bet those cut all darn day.. er week.. er month.. :D

Tostig
 
Hello Tostig,
Thanks for the post,
It is really weird how some high carbide CPM steels perform, if you manage to put a really course edge on one side and really fine highly polished edge they work fine, also some work well with a polished edge on both sides, but not all. 15v as far as I can tell you works ok both ways but this type of steel was never designed to hold a ‘Hair Popping edge’ it was designed to be used for tooling.
Take care

Tostig said:
Those look like real user's ! I like the handle materials choice and colors too.

I'll bet those cut all darn day.. er week.. er month.. :D

Tostig
Click to expand...
 
Nice Knives Farid!

I was wondering how it stacks up to the A11/10V class steels as far as edges. Do you have to run thicker bevels to make up for lesser toughness than the A11 class? How about belt use? I imagine it's easier to work than the Rex 121 you have tried but it still seems pretty wear resistant even in an annealed state. Is it much worse on belts than A11? How about the T1 ?

Thanks for taking the time to share the knowledge Farid!.


Joe/raleigh
 
farid. said:
Hello Tostig,
Thanks for the post,
It is really weird how some high carbide CPM steels perform, if you manage to put a really course edge on one side and really fine highly polished edge they work fine, also some work well with a polished edge on both sides, but not all. 15v as far as I can tell you works ok both ways but this type of steel was never designed to hold a ‘Hair Popping edge’ it was designed to be used for tooling.
Take care
Click to expand...

10V, K294 (A11) and S110V seem to hold that hair popping edge for a very long time, but they are finer grained than some of the others. :)
 
Last edited:
Hi Joe,

Ok, first the T-1, This steel has 18% Tungsten so it is around 10% heavier than most steels because of high percentage of (W). provided that it heat-treated correctly it will cut for a very long time and I really like this steel.
REX 121 comes to me at around 57-58RC in the annealed state, you will use lots of ceramic belts, before heat-treating and specially after.

Thicker bevel ? well, in my experience thinner works much better but I know what you are saying. Here is a movie of me using a CPM-10v cutting competition chopper to cut 15mm copper water pipe, this 10v chopper had a thicker edge. I know what you are saying.

http://www.youtube.com/watch?v=lcCjUOp5F2U


Test No-1,
I can only tell you about 15v and REX 121, if you were to test these two steels both the same thickness, the ‘same hardness’ and sharpened to a high polished edge, REX 121 at 68- 70RC and 15v to 64-65RC, the REX 121 would cut a lot longer than 15v. because of its matrix (alloy composition) and hardness.

Test No-2,
If you were to test two blades 15v and REX 121, heat-treat the 15v to full hardness and heat-treat the REX 121 to full hardness which is 71.5RC, although this hardness is not advisable, but as a test the performance of the REX 121 would be in my experience around 40-50% more than 15v.
I wanted to start using CPM-REX 121 because there was no other steel out there which could come anywhere near the hardness and wear resistance, not easy to work with before or after heat-treating.
Take care





The Mastiff said:
Nice Knives Farid!

I was wondering how it stacks up to the A11/10V class steels as far as edges. Do you have to run thicker bevels to make up for lesser toughness than the A11 class? How about belt use? I imagine it's easier to work than the Rex 121 you have tried but it still seems pretty wear resistant even in an annealed state. Is it much worse on belts than A11? How about the T1 ?

Thanks for taking the time to share the knowledge Farid!.


Joe/raleigh
Click to expand...
 
I'm not much of a steel guy, Farid, but damn those are some fine-lookin' knives! Such beautiful 'clean' & uncluttered simplicity... very nice work, sir! :thumbup:
 
farid. said:
Hi Joe,

Ok, first the T-1, This steel has 18% Tungsten so it is around 10% heavier than most steels because of high percentage of (W). provided that it heat-treated correctly it will cut for a very long time and I really like this steel.
REX 121 comes to me at around 57-58RC in the annealed state, you will use lots of ceramic belts, before heat-treating and specially after.

Thicker bevel ? well, in my experience thinner works much better but I know what you are saying. Here is a movie of me using a CPM-10v cutting competition chopper to cut 15mm copper water pipe, this 10v chopper had a thicker edge. I know what you are saying.

http://www.youtube.com/watch?v=lcCjUOp5F2U


Test No-1,
I can only tell you about 15v and REX 121, if you were to test these two steels both the same thickness, the ‘same hardness’ and sharpened to a high polished edge, REX 121 at 68- 70RC and 15v to 64-65RC, the REX 121 would cut a lot longer than 15v. because of its matrix (alloy composition) and hardness.

Test No-2,
If you were to test two blades 15v and REX 121, heat-treat the 15v to full hardness and heat-treat the REX 121 to full hardness which is 71.5RC, although this hardness is not advisable, but as a test the performance of the REX 121 would be in my experience around 40-50% more than 15v.
I wanted to start using CPM-REX 121 because there was no other steel out there which could come anywhere near the hardness and wear resistance, not easy to work with before or after heat-treating.
Take care
Click to expand...
Great info, Farid. Thanks for sharing it! :)
 
timberweasel said:
I'm not much of a steel guy, Farid, but damn those are some fine-lookin' knives! Such beautiful 'clean' & uncluttered simplicity... very nice work, sir! :thumbup:
Click to expand...
Thank you sir, I am more and more going towards simple designs,
I like to share with you all a few pics. The other week I took out one of my basic D3 tool steel bushcraft blades, 62RC, green canvas micarta, a very simple design, but very high performance, tried it on this 2" x 3".
I hope you like the pics.
Farid
DSC06614.jpg

DSC06612.jpg

DSC06608.jpg

DSC06609.jpg

DSC06611.jpg
 
My goodness ! that is quite an impressive piece of cut wood :D

I like the simplicity of that knife , simple yet beautiful.

Tostig
 
I think thats the record for biggest fuzz stick ever! Great looking knives sir. Is there anything you havent tried yet or something new you are looking at?
 
tjiscooler said:
I think thats the record for biggest fuzz stick ever! Great looking knives sir. Is there anything you havent tried yet or something new you are looking at?
Click to expand...

There was one thing I wanted to do which still haven’t done yet, go to a car scrap yard with the CPM-REX 121 chopper, ask permission if I can choose a car and cut the whole roof in half. Just for fun.
 
farid. said:
There was one thing I wanted to do which still haven’t done yet, go to a car scrap yard with the CPM-REX 121 chopper, ask permission if I can choose a car and cut the whole roof in half. Just for fun.
Click to expand...

An old car, back when they used to make them out of steel. :D

Not aluminum foil and plastic...
 
You must log in or register to reply here.
Back
Top