Yeah it was definitely water quenching.....just listening to it you can tell its not a good thing to do. You can almost hear the cracking noise predicting the future. Steel in general...oil is good, air drying isn't bad. Not sure with knives on that one though.
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Two broken, what happened?
- Thread starter Kenny H.
- Start date
400 degrees in an oven for an hour? I'm just trying to get the hardened section of the bit to turn blue and that'll tell me I've got the right temper?
Stacy E. Apelt - Bladesmith
ilmarinen - MODERATOR
Moderator
Knifemaker / Craftsman / Service Provider
- Joined
- Aug 20, 2004
- Messages
- 38,493
There is not much info in your profile, so I don't know much about you and your abilities.
I do know that you probably need to take a step back and learn some basics before making another blade. Read all the stickies at the top of this forum. Get a good book on knife making....and read it cover to cover twice. Not knowing about tempering is about the same as a surgeon not knowing how to suture up the opening after surgery. Heat treatment is the place where the beat up steel becomes a good tool.
Just heating it to get a certain color isn't enough to properly temper a blade ( I know,there are those who temper blades this way). The structures in the metal that are converting during the temper take time. Temper cycles are done around 400F for simple steels, usually for one or two hours, and then cooled to room temperature and repeated again. A quick flash to blue color can ruin a temper ( like when grinding and the edge gets to hot) but it won't make a temper initially.
I do know that you probably need to take a step back and learn some basics before making another blade. Read all the stickies at the top of this forum. Get a good book on knife making....and read it cover to cover twice. Not knowing about tempering is about the same as a surgeon not knowing how to suture up the opening after surgery. Heat treatment is the place where the beat up steel becomes a good tool.
Just heating it to get a certain color isn't enough to properly temper a blade ( I know,there are those who temper blades this way). The structures in the metal that are converting during the temper take time. Temper cycles are done around 400F for simple steels, usually for one or two hours, and then cooled to room temperature and repeated again. A quick flash to blue color can ruin a temper ( like when grinding and the edge gets to hot) but it won't make a temper initially.
- Joined
- Jul 13, 2009
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- 21,855
Watch this first.
http://ia311216.us.archive.org/3/items/gov.ntis.ava08799vnb1/ava08799vnb1_512kb.mp4
This is a nice list of books. Many of them are old and unavailable.
http://www.knifedogs.com/showpost.php?p=48612&postcount=1
In particular, I like these, still available and good info.
(Paladin Press, sometimes on Amazon, sometimes not.)
The Complete Bladesmith: Forging Your Way to Perfection, by Jim Hrisoulas.
Master Bladesmith: Advanced Studies in Steel, by Jim Hrisoulas. *
Pattern Welded Blade, by Jim Hrisoulas. *
How to Make Knives, by Robert Loveless/Richard Barney. *
Step by Step Knifemaking, by David Boye. *
Custom Knifemaking: 10 Projects From a Master Craftsman, by Tim McCreight. *
Read this one for how to make a home made grinder, forget about cable damascus for now, it is NOT a beginner project. The heat treating goop is BS, use an oil, buy a proper quench oil if you can.
Wayne Goddard's $50 Knife Shop, by Wayne Goddard. *
...and the fellow that asked you if you tempered posted this page
http://www.hawknknives.com/forging/_forging.shtml