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Heat Treating and Metallurgy Discussion of heat treatment and metallurgy in knife making.

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  #1  
Old 01-25-2009, 08:41 PM
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Andrew Garrett Andrew Garrett is offline
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Favorite HT recipe

I have recipes for the steels I like, but there are so many... and several for each steel.

So, tell us all how you HT your favorite steels. Be sure to include what your rockwell numbers are as quenched / tempered (if known).


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Old 01-26-2009, 08:14 AM
Kevin R. Cashen Kevin R. Cashen is offline
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There is a recipe book called "The Heat Treater's Guide" it is pricey but one can get the individual recipes for free from the people who make and sell the steel. Two such sources are the web sites for Carpenter Steel and Crucible Service Centers. It is also well worth the visit to http://steel.keytometals.com/.

Last edited by Kevin R. Cashen; 02-01-2009 at 03:40 PM.
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Old 02-01-2009, 03:43 PM
Kevin R. Cashen Kevin R. Cashen is offline
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Gosh I didn't mean to kill the thread guys. There are many sources for heat treating specs out there, I was looking forward to any other sources folks have found. There is also a sticky at the top of the forum that has some links to other sites with heat treating parameters.
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Old 02-01-2009, 05:16 PM
Suicycle Suicycle is offline
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I haven't got a recipe, but how are guys doing water quench on steels. Hot water, brine, interruped quench? What are some of the methods used that don't seem to crack on a regular basis? And what steel are you doing it with.
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Old 02-01-2009, 07:35 PM
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Okay, my favorite recipe for 1075:
Heat to 1450 and hold for around 10 minutes, quench in 140-degree mineral oil until cool enough to touch for short periods of time, temper at 400 for one hour. I also use a clay spine insulator.


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Old 02-02-2009, 12:03 PM
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Here Is how I been doin A-2!
Bring oven up to 1450 let soak 15 min. then go to 1775 and soak for 30 min. and plate quench. Do a triple temper and 500 deg. 2 hours each time. If you have a way to cryo do that once inbetween a temper cycle. I don't cryo but I do put the blade in the deep freeze and I think that helps with some toughness a little. Let me know what you think about the madness to my methods. Thanks, Shane


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Old 02-24-2009, 04:15 PM
shgeo shgeo is offline
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Shane

That is spot on for A2. Cryo will gain 1-3 points on the hardness scale, but will reduce the impact strength. A2 hardened and tempered to HRC 60 will be testably more impact resistant than if the hrc 60 was obtained by HT+CRYO.

Check out this study: http://www.airproducts.com/NR/rdonly...ing%20steel%22

Most of what can be found on the Web about Cryo has been written by people in the business who have the sale of cryo at heart. This was the first independent study I found.


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