MEMBER ITEMS FOR SALE
Custom Knives | Other Knives | General Items
-------------------------------------------
New Posts | New PhotosAll Photos



Go Back   The Knife Network Forums : Knife Making Discussions > Custom Knife Discussion Boards > Knife Making Discussions > The Newbies Arena

The Newbies Arena Are you new to knife making? Here is all the help you will need.

Reply
 
Thread Tools Display Modes
  #1  
Old 04-15-2021, 01:26 AM
Rasmus Kristens Rasmus Kristens is offline
Steel Addict
 
Join Date: Jul 2014
Location: Denmark
Posts: 185
Temper of fillet knife

hi guys

So i have an issue..

I was tempering my fillet knife for the 2nd time, and accidentily set the oven to hot air instead of regular top/bottom heat... That turned out pretty hot.

So what can you say about this temper? I will still finish the knife, i ask just to learn :-)

Reply With Quote
  #2  
Old 04-15-2021, 05:01 AM
Crex's Avatar
Crex Crex is offline
Moderator
 
Join Date: Sep 2002
Location: Acworth, GA and/or Hanging Dog, NC
Posts: 3,529
Actually that doesn't look too bad. Was the setting around 400? A lot will depend on the steel you used. If it's a "stainless" steel, can make a big diff. Hi-carb forgable should be ok.
Sharpen and try it out for edge retention and flex (before mounting a handle).


__________________
Carl Rechsteiner, Bladesmith
Georgia Custom Knifemakers Guild, Charter Member
Knifemakers Guild, voting member
Registered Master Artist - GA Council for the Arts
C Rex Custom Knives

Blade Show Table 5-J
Reply With Quote
  #3  
Old 04-15-2021, 06:29 AM
Rasmus Kristens Rasmus Kristens is offline
Steel Addict
 
Join Date: Jul 2014
Location: Denmark
Posts: 185
Its of 90crv2 steel, it was set to 410 F i guess it reached somewhere around 445-455 F.

Last edited by Rasmus Kristens; 04-15-2021 at 10:59 AM.
Reply With Quote
  #4  
Old 04-15-2021, 06:30 AM
Rasmus Kristens Rasmus Kristens is offline
Steel Addict
 
Join Date: Jul 2014
Location: Denmark
Posts: 185
whats the best way to test retention? Just cut a lot of stuff and see when it gets dull?
Reply With Quote
  #5  
Old 04-15-2021, 07:13 AM
WBE WBE is offline
Skilled
 
Join Date: Feb 2009
Posts: 484
If going by color, the edge got way over heated.
Reply With Quote
  #6  
Old 04-15-2021, 07:28 AM
Rasmus Kristens Rasmus Kristens is offline
Steel Addict
 
Join Date: Jul 2014
Location: Denmark
Posts: 185
Quote:
Originally Posted by WBE View Post
If going by color, the edge got way over heated.
that was exactly my thought at first. But when i look at temper colour charts, that colour happens at WAY higher temerature than the oven could possibly reach on the settings it was on.
Reply With Quote
  #7  
Old 04-15-2021, 10:58 AM
Rasmus Kristens Rasmus Kristens is offline
Steel Addict
 
Join Date: Jul 2014
Location: Denmark
Posts: 185
i think i did an edge deflection test :-)

I put an edge on the blade and dragged it across a brass rod. I could see the edge deflect against the brass, but the edge didnt deform and it didnt crack.

How much pressure should i put on the blade when doing this test? I left some very noticeable scratches in the brass.
Reply With Quote
  #8  
Old 04-16-2021, 06:33 AM
Crex's Avatar
Crex Crex is offline
Moderator
 
Join Date: Sep 2002
Location: Acworth, GA and/or Hanging Dog, NC
Posts: 3,529
Reading surface colorization from heat is not a very accurate way to determine much. Different steels react differently. With 80crv2, 400 is good ballpark temp to start testing results.

If the edge flexed and did not crack but came back to straight, you should be ok. Yes, sharpen and cut different things like cardboard, shave some wood, etc. - all the things you would normally do with a blade. If it dulls quickly you can redo the hardening quench with this steel and try again on the temper draw at a lower temp.

Just remember most try to achieve a flexible blade on fillet knives. A lot of that has to do with distal taper geometry.


__________________
Carl Rechsteiner, Bladesmith
Georgia Custom Knifemakers Guild, Charter Member
Knifemakers Guild, voting member
Registered Master Artist - GA Council for the Arts
C Rex Custom Knives

Blade Show Table 5-J
Reply With Quote
  #9  
Old 04-16-2021, 12:16 PM
Rasmus Kristens Rasmus Kristens is offline
Steel Addict
 
Join Date: Jul 2014
Location: Denmark
Posts: 185
Thanks crex. It has a distal taper, but the blade is made from a 0.12" thick scrap knife blank i had laying around.
Because of the thick stock its quite stiff.


high quality gif upload

But im happy with the result, also because its the first time i freehand grind a knife on my belt Sander.

Last edited by Rasmus Kristens; 04-16-2021 at 12:26 PM.
Reply With Quote
  #10  
Old 04-20-2021, 05:45 AM
Crex's Avatar
Crex Crex is offline
Moderator
 
Join Date: Sep 2002
Location: Acworth, GA and/or Hanging Dog, NC
Posts: 3,529
Yeah that's pretty thick on out into the working area for a fillet. More like a boning knife (I prefer that on bigger fish).
Sounds like a good excuse to go catch some fish and put to task as designed. You'll know for sure after the first 5 or 6.

Note: If you do decide to re thermal cycle the blade, make sure you go through the normalization process prior to hardening quench.


__________________
Carl Rechsteiner, Bladesmith
Georgia Custom Knifemakers Guild, Charter Member
Knifemakers Guild, voting member
Registered Master Artist - GA Council for the Arts
C Rex Custom Knives

Blade Show Table 5-J
Reply With Quote
Reply

Tags
a, art, blade, brass, ca, edge, fillet, fillet knife, finish, handle, heat, hot, knife, knife blank, knives, made, make, project, retention, rod, sander, stainless, steel, temper, wood


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
new fillet knife! jonwelder The Outpost 3 04-10-2008 07:22 AM
New Fillet Knife Sean O'Hare The Display Case 3 10-04-2004 10:17 PM
First Fillet Knife. Jason Cutter The Display Case 5 09-19-2004 02:23 PM
Fillet Knife Sean O'Hare The Display Case 4 11-24-2003 09:04 AM
Fillet Knife Hawk The Display Case 13 11-20-2003 10:05 AM


All times are GMT -5. The time now is 11:35 AM.




KNIFENETWORK.COM
Copyright © 2000
? CKK Industries, Inc. ? All Rights Reserved
Powered by ...

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
The Knife Network : All Rights Reserved