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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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#1
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heat treat question
Is there a home made way to heat treat 440c and ats34?
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#2
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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 |
#3
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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. |
#4
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HTQ
Thanx jsaund22, Thanx fitzo. I appreciate your intrest,effort,and reply.--------JW
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blade, knife |
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