Go Back   Ukbladesforum.co.uk > The Workshop > How To's and How Do You's

How To's and How Do You's Need a helping hand? Want to offer a helping hand? This is the place to post your questions and/or tutorials about knife making.

Reply
 
Thread Tools Display Modes
  #1  
Old 14-08-2013, 04:51 PM
peterbermingham's Avatar
peterbermingham peterbermingham is offline
Senior Member

 
Join Date: Oct 2012
Location: ireland
Posts: 126
peterbermingham is on a distinguished road
Default two blades tested today

I had two blades tested today one a neck knife that one was 57 hrc happy enough with that. The other a bushy that was 55 hrc. My question is should i increase the time in the oven or decrease to get it to 57/58 hrc or do ya up or down the temp, or whats your opinion would ye leave the blade at 55. Thanks all
Reply With Quote
  #2  
Old 18-08-2013, 12:57 PM
HillBill's Avatar
HillBill HillBill is offline
Watching

 
Join Date: Sep 2009
Location: West Yorkshire
Posts: 2,613
HillBill is on a distinguished road
Default

Lower the temp I'm the oven during the tempering cycle, to keep the hardness higher. It could also be that they weren't hardened properly during the hardening process.
__________________
http://markhillknives.com
Reply With Quote
  #3  
Old 18-08-2013, 02:25 PM
Tom's Avatar
Tom Tom is offline
Woolly
 
Join Date: Sep 2009
Location: Briton
Posts: 5,049
Tom is on a distinguished road
Default

Quote:
Originally Posted by peterbermingham View Post
I had two blades tested today one a neck knife that one was 57 hrc happy enough with that. The other a bushy that was 55 hrc. My question is should i increase the time in the oven or decrease to get it to 57/58 hrc or do ya up or down the temp, or whats your opinion would ye leave the blade at 55. Thanks all
Are they the same material?
Same thickness?
etc
etc

If they are different thickness for example, you may get different result if you HT and temper exactly the same?


Tom
__________________
Wood and Knife Making Supplies & Web Hosting from £4.25 per month

'Make no little plans, they have no magic to stir menís blood'
Reply With Quote
  #4  
Old 19-08-2013, 12:53 PM
peterbermingham's Avatar
peterbermingham peterbermingham is offline
Senior Member

 
Join Date: Oct 2012
Location: ireland
Posts: 126
peterbermingham is on a distinguished road
Default

Ya mark i think you are right on the hardening part. Looking back i think that's where i went wrong i have it heat treated again will be Wednesday before i can get it tested. Thanks everyone
Reply With Quote
  #5  
Old 21-08-2013, 03:12 PM
peterbermingham's Avatar
peterbermingham peterbermingham is offline
Senior Member

 
Join Date: Oct 2012
Location: ireland
Posts: 126
peterbermingham is on a distinguished road
Default

Yes it was the hardening stage that went wrong got blade tested 58 hrc Thanks again all
Reply With Quote
Reply


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 Off

Forum Jump


All times are GMT. The time now is 04:00 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.