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 Folding Knife (& Switchblade) Forum

The Folding Knife (& Switchblade) Forum The materials, techniques and the designing of folding knives.

Reply
 
Thread Tools Display Modes
  #1  
Old 02-13-2014, 09:37 AM
irishknifeworks irishknifeworks is offline
Enthusiast
 
Join Date: Sep 2013
Location: Smyrna, Tn
Posts: 35
Spring Tempering

Does anyone know how to spring temper 01 for a slipjoint backspring?
Reply With Quote
  #2  
Old 02-13-2014, 09:54 AM
cnccutter's Avatar
cnccutter cnccutter is offline
Steel Addict
 
Join Date: Mar 2011
Location: Dorena, Oregon
Posts: 183
all depends on what you have available to you.

I used a simple propane torch to do the final spring temper in the beginning and still do once in a while. I have a good oven now that gives me a much more consistent outcome and I can do multiple blades/ springs at a time.

I start by bring the spring to nonmagnetic in my forge, hold for a minute and quench in olive oil. Usually comes out at about a rc61+- (yes I test them)

polish/sand the spring to a bright finish and then draw a even light blue color from tip back through both back pin holes.

in 100 folders I have never had a spring fail that I tempered this way.

it doesn't have to be hard in the beginning, just repeatable. as time goes on you can upgrade and get a good oven so you can dial it in and maximize the best heat treating possible

Erik
Reply With Quote
  #3  
Old 02-13-2014, 03:17 PM
irishknifeworks irishknifeworks is offline
Enthusiast
 
Join Date: Sep 2013
Location: Smyrna, Tn
Posts: 35
Thanks. It seems simple enough.
Reply With Quote
  #4  
Old 03-07-2014, 08:01 AM
irishknifeworks irishknifeworks is offline
Enthusiast
 
Join Date: Sep 2013
Location: Smyrna, Tn
Posts: 35
My spring bent the first time I test fitted the knife. Does this mean I tempered it too long with the torch?
Reply With Quote
  #5  
Old 03-07-2014, 08:02 AM
Naboyle's Avatar
Naboyle Naboyle is offline
Steel Addict
 
Join Date: Dec 2012
Location: New Florence, Pennsylvania.
Posts: 263
Yep. Way toooo soft
Reply With Quote
  #6  
Old 03-07-2014, 08:56 AM
cnccutter's Avatar
cnccutter cnccutter is offline
Steel Addict
 
Join Date: Mar 2011
Location: Dorena, Oregon
Posts: 183
sounds way to soft.... you did harden the spring first before you tried to temper?

don't laugh, I've had friends get in a rush and forget to do it.

Erik


Quote:
Originally Posted by irishknifeworks View Post
My spring bent the first time I test fitted the knife. Does this mean I tempered it too long with the torch?

Last edited by cnccutter; 03-07-2014 at 08:58 AM.
Reply With Quote
  #7  
Old 05-26-2015, 02:09 PM
jasoncline jasoncline is offline
Registered
 
Join Date: May 2015
Location: Oakland, Ca
Posts: 1
So it sounds like it can almost match the blade heat treat? Obviously not having to do 2 separate processes seems like a plus.

I've been making fixed blade knives, mostly kitchen for a while but I'm just starting to look into building folders.
Reply With Quote
  #8  
Old 05-27-2015, 06:08 AM
WBE WBE is offline
Skilled
 
Join Date: Feb 2009
Posts: 483
01 requires a higher temper heat than simple steels, in order to use it for springs. It is not the best choice if you do not have an oven. To harden, it should be hardened as you would a blade, with a timed soak, then tempered at least 75? to 100? higher than for simple steels. Simple 10xx steels need a temper at no less than 700?, and up to 750?. If you are going by color, that is in the neutral range. 01 requires more. With the short travel of a folder spring, you might get away with lower temps, but you are taking a risk in long term use.
Reply With Quote
Reply

Tags
art, back, bee, beginning, blade, blades, building, fixed, fixed blade, folder, forge, harden, heat, heat treat, how to, hunting knife, kitchen, knife, knives, making, sand, simple, temper


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
Tempering L6 NorCal Nate The Newbies Arena 2 12-10-2011 01:58 AM
Spring Tempering 01 lpspurgeon Heat Treating and Metallurgy 2 10-18-2009 08:13 PM
Putting "spring" back into a spring--? jonwelder Ed Caffrey's Workshop 1 12-02-2005 12:15 AM
Tempering Help D.Gary Milne Knife Making Discussions 2 04-24-2005 09:12 PM
Pocket Knife Spring Tempering Gene Chapman The Outpost 5 07-18-2002 02:36 PM


All times are GMT -5. The time now is 05:15 PM.




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

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
The Knife Network : All Rights Reserved