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| High-Performance Blades Sharing ideas for getting the most out of our steel. |
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#1
12-21-2002, 12:58 PM
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Cryo available
Cryo offered
Angel Sword Forge has opened its cryogenics treatment facilities commercially. We can handle lengths up to 48 inches. Daniel Watson 
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#2
12-22-2002, 11:41 AM
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Do you do post cryo tempering also? Crucible Steel recommends at least one tempering after cryo.
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#3
12-22-2002, 12:09 PM
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We typically do a computer controlled descent to -300F, no thermal shock, then a controlled re-ascent and temper to +300F. We like to do a second temper as well.
Daniel
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#4
12-22-2002, 12:18 PM
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How about high alloy steels that might temper as high as 950F?
This might be a great resource for those lacking cryo facilities. They can do a single temper right after hardening, then send it off to you for cryo and final temper(s). They have to do at least one temper after hardening of course, at least with high alloy steels anyway.
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#5
12-22-2002, 07:48 PM
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Most of the info I have read suggests cryo between hardening and tempering for maximum benefit.
Our cryo unit itself does the temper to +300F. We have a separate unit for higher temperatures. Daniel
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#6
12-22-2002, 08:05 PM
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I agree about the cryo then tempering, IF it is done immediately out of the hardening oven. The important thing is to always temper after cryo, regardless. Paul Bos frequently does what he calls a snap tempering anyway, just a short cycle to begin drawing the steel, allowing more time for the cryo to begin. It's not usually done in different cities though...
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#7
12-22-2002, 08:06 PM
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Freebie
Oops! I forgot to mention that from now until the end of March, the first piece any knifemaker sends me for cyro will be free (except shipping).
 Daniel http://www.angelsword.com/
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#8
12-22-2002, 08:38 PM
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A snap temper certainly would relieve some of the stress, but is likely to also convert some of the residual austentite to bainite and so gain less martensite in the cryo. It might be a trade off.
What kind of temp and hold on the snap? Daniel
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#9
12-22-2002, 08:38 PM
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BTW, you make beautiful swords. Nice website.
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#10
12-22-2002, 08:49 PM
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I don't really know the cycles Paul uses. I send him my iron, he sends back steel. It works. I've had one of my Rc61 CPM-3V blades bent 90 degrees, back and forth four times before it broke, and that was with a BIG man leaning all his weight on it to get it to bend that far.
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#11
12-22-2002, 09:07 PM
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Thanks for the comment on the website. The Avatar TechnoWootz has been extremely popular. I hope to be able to offer it as bar stock soon.
Daniel
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#12
12-22-2002, 09:13 PM
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Impressive. Any idea of about how much bend and return to true you're getting with that?
Daniel
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#13
12-22-2002, 09:18 PM
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The first bend left about a 15-20 degree set.
I'd be interested in your wootz when you have it ready.
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#14
12-22-2002, 09:20 PM
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Length and thickness of blade?
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#15
12-22-2002, 09:22 PM
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Oops I had better clarify that I was asking about your bend test.
Daniel
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| blade, forge, knife |
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