eggwelder Posted February 13, 2014 Share Posted February 13, 2014 this one would not oil harden. made from nondescript leaf spring, probably china. water hardened. went ping in 5 minutes. 3 times. next photo, same leaf spring, other side of centre hole. warm oil quench, hardened beautifully, torch tempered. excellent edge. same bunch of springs, different leaf. cold oil quench didn't harden, so used water. got this lesson twice, except this one split along the spine of the blade and perpendicular to the edge. lesson: warm oil for free springs that are of origins unknown for me Quote Link to comment Share on other sites More sharing options...
Steve Sells Posted February 13, 2014 Share Posted February 13, 2014 hmm if you read the HT posts I made, in there I explained the need to always warm the oil. Hopefully lesson learned young grasshopper :) Quote Link to comment Share on other sites More sharing options...
eggwelder Posted February 13, 2014 Author Share Posted February 13, 2014 these made and broke as i self taught. about 3 month before joining IFI. i keep them around as reminders and i may actually shadowbox them as they were a lot of work. but yes, i have a lot to learn and more to read. heat treating mystery metals is a somewhat fun if not exact science. always test. lesson learned. Quote Link to comment Share on other sites More sharing options...
gearhartironwerks Posted February 14, 2014 Share Posted February 14, 2014 Yep, been there, and occasionally still am. Stuff.. happens. Hopefully you'll be able to diagnose the problem, and read Steve's suggestions. John Quote Link to comment Share on other sites More sharing options...
eggwelder Posted February 15, 2014 Author Share Posted February 15, 2014 there are four other knives that made it thru to finishing, and another broken, so i guess i have about a 75%ish success rate. but it always seems to be the ugly that survive. Quote Link to comment Share on other sites More sharing options...
rockstar.esq Posted February 27, 2014 Share Posted February 27, 2014 eggwelder - that last line of yours applies to more than just knife making! Quote Link to comment Share on other sites More sharing options...
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