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 10-03-2003, 08:14 PM
rabbit_skinner rabbit_skinner is offline
Enthusiast
 
Join Date: Sep 2003
Location: East Coast of Central Fla.
Posts: 40
1095 warped. searched archive.

I just finished HT and Tempering 4 blades.
The blades are 1/8" 1095,about 1" wide
The 2 blades in question are 7 1/2 oal
and warped about 0.125" at the tip and the warp
starts about 3 inches from the tip.

I am not looking for the answer as to why they warped.
I feel silly not looking closer to see if it
was before or after HT or temper.

A search of the archives gives a lot of hits,but
not a direct answer.

My question is,with 1095 after HT and 2 cycles
of 400 degrees for 2 hours, can I straighten
this warp by cold bending ?
If knives should bend and not break then I believe
that I should be able to cold bend it straight.
The cost of the steel is negligible,but I would
like to save some of my time that I have in them.

Question #2.
I am looking for a little harder blade,for kitchen
use. What temper temperature do you use for blades
that you are not intending to torture by bending them ?

Thanks
Mike

Last edited by rabbit_skinner; 10-03-2003 at 08:37 PM.
Reply With Quote
  #2  
Old 10-03-2003, 09:16 PM
DC KNIVES DC KNIVES is offline
Guru
 
Join Date: Jun 2002
Location: Satellite Beach, Fl.
Posts: 1,119
Mike , sorry to hear about that, but it is not that uncommon,especially for newbies. Most of us have warped more than we care to admit. If it was me I would reheat and anneal the blade then straighten it, then try again. The results usually come out better.
On kitchen knives, I heat treat the exact same as I would all others.
Good luck ,my friend,Dave
Reply With Quote
  #3  
Old 10-04-2003, 09:02 AM
Ray Rogers's Avatar
Ray Rogers Ray Rogers is offline
Founding Member / Moderator
 
Join Date: Jun 2002
Location: Wauconda, WA
Posts: 9,840
#1 No, cold bending will almost surely break the blade, especially if it wasn't differentially hardened. Been there, done that. If it was differentially hardened you can usually do some cold straighteneing but the tip is not going to take much. Even though you didn't ask, the warp was probably caused during the quench, possibly the result of an uneven grind.

#2 Time to experiment. If 400 F is too soft you suit you, then try 300 F. If that's too hard, put the blade back in the oven at 350 F and soften it a little....


__________________

Your question may already have been answered - try the Search button first!






Reply With Quote
  #4  
Old 10-04-2003, 01:57 PM
Fsawyer Fsawyer is offline
Steel Addict
 
Join Date: May 2003
Location: Texas
Posts: 158
Re: 1095 warped. searched archive.

Quote:
Originally posted by rabbit_skinner
I just finished HT and Tempering 4 blades.
The blades are 1/8" 1095,about 1" wide
The 2 blades in question are 7 1/2 oal
and warped about 0.125" at the tip and the warp
starts about 3 inches from the tip.

I am not looking for the answer as to why they warped.
I feel silly not looking closer to see if it
was before or after HT or temper.

A search of the archives gives a lot of hits,but
not a direct answer.

My question is,with 1095 after HT and 2 cycles
of 400 degrees for 2 hours, can I straighten
this warp by cold bending ?
If knives should bend and not break then I believe
that I should be able to cold bend it straight.
The cost of the steel is negligible,but I would
like to save some of my time that I have in them.

Thanks
Mike
I work with 1095.. and although I am a newby myself I can tell you with some experience that when I warped a blade it happened almost always when I quenched it.
Quench and look to see if the blade is warped... IF it is warped I put on some oven mits.. (I have some asbetos mits for high temp) and IMMEDIATELY place the HOT knife in a vise and slightly give pressure to the warp spot. This will almost always straighten it out.
IF you wait until the blade is cold.. it's toooooo late.. you'll snap it.
Unless you reheat it.. and anneal it.
I've got a bucket with a few snapped blades to prove it.
Reply With Quote
  #5  
Old 10-04-2003, 06:51 PM
rabbit_skinner rabbit_skinner is offline
Enthusiast
 
Join Date: Sep 2003
Location: East Coast of Central Fla.
Posts: 40
Thanks Dave,Ray and Fsawyer.
I will anneal,straighten,re-HT and
be more aware next time.
After HT and Temper is it normally
difficult to file or is my 400 degree
oven colder than expected?
I can currently file better than I can
grind,so I was going to use a file to finish 'grinding' after HT.
I am going to eventually get a multimeter with a
thermocouple to check the oven,but the wife
believes that it is close,judging by her
cooking times.
Thanks again for your help.
Mike
Reply With Quote
  #6  
Old 10-04-2003, 07:15 PM
Ray Rogers's Avatar
Ray Rogers Ray Rogers is offline
Founding Member / Moderator
 
Join Date: Jun 2002
Location: Wauconda, WA
Posts: 9,840
Results can vary for a lot of reasons but I would guesstimate that a 400 F temper would give you somewhere around a Rc 58 and that would be pretty difficult to file. You may find that making 1095 any harder than that will make your edge too brittle even for a kitchen knife.

Kitchen ovens are notorious for being inaccurate so yours could easily be off. although it might not be off by much. That's why we always say there is no substitute for experimenting to see what gives the best results .....


__________________

Your question may already have been answered - try the Search button first!






Reply With Quote
Reply

Tags
blade, knife, knives


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


All times are GMT -5. The time now is 07:30 AM.




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

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
The Knife Network : All Rights Reserved