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Ed Caffrey's Workshop Talk to Ed Caffrey ... The Montana Bladesmith! Tips, tricks and more from an ABS Mastersmith.

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Old 07-18-2002, 06:29 AM
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heat treat question

Is there a home made way to heat treat 440c and ats34?
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Old 07-18-2002, 07:55 AM
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Jawpaw,

I heat treat my own with a small Paragon jewelry furnace that I was given by my high school art teacher. It is quite small, and the blades have to be put in diagonally from back top to bottom front. I put the blades in sharp edge down and as vertical as possible to avoid warping.

These furnaces can be found on Ebay, but I don't see any on there now.

For 440c, I bring to critical temperature for a half hour and oil quench. Then I temper in my kitchen oven at 425 degrees for 2 hours. I do this three times. I treated one the other night and it passed the brass rod test.

Hope this helps.

Jamey Saunders
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Old 07-18-2002, 08:50 AM
fitzo fitzo is offline
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HT

440C and ATS34 can be effectively HT'd at home. The details vary from maker to maker. An interesting method recently published at BF:
http://www.bladeforums.com/forums/sh...hreadid=209639

Most however use a controlled temp furnace, foil wrap to avoid oxidation, air or oil quench, and a cryogenic treatment post hardening or between tempers to convert retained austensite to martensite. It is a process one must develop for oneself. Good initial directions are available from the major knife supply houses when you buy their steel.

Expect a few failures. Heat treatment is probably the single-most distinguishing feature between a good knife and a great one with respect to performance. It is easy to get a crappy HT on SS at home, so post-HT testing is critical.

Good luck. With practice, it can be done well.
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Old 07-18-2002, 06:28 PM
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HTQ

Thanx jsaund22, Thanx fitzo. I appreciate your intrest,effort,and reply.--------JW
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