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Post by Deleted on Aug 11, 2008 2:29:27 GMT
HT'd 3 knives and the tactical katana tonight, went very good. The sword was a bit off, has a soft spot at the base of the blade from not getting it hot enough in the homemade HT forge hehe, due to running it back and forth through it trying to heat up the whole length. But the 3 knives came out FANTASTIC! Park's #50 ROCKS, damn fine oil, really great stuff. Steels were 1075, 1084, and 5160 and all hardened up perfectly and completely (except the sashimi knife with the hamon , but that was on purpose). Got a couple more to finish now, so expect some more finished work over the next couple weeks......
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Post by Matt993f.o.d on Aug 11, 2008 18:09:19 GMT
What exactly is this Parks oil made up of?
Shame about the sword. When my latest knife didnt quite harden right the first time, I merely repeated the hardening without normalising in between. The same as Mr Lively does in that fine DVD of his. Of course that would be a pain in the arse with a sword length blade.
Nice looking furnace.
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Post by Deleted on Aug 11, 2008 18:57:19 GMT
It's no big deal, atleast it didn't crack. A failed hardening is no big deal, in fact it was cool to see that it was spotty in the places that were hot enough, and as the heat tapered off at one part so did the hardness. I'll RE HT like I said when I get a better forge or better burner, there is no problem with just hardening it again but it is good to throw a normalisation cycle in there to reset everything.
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Post by Matthew Stagmer on Aug 11, 2008 21:10:17 GMT
Yea. It will be tough getting that long Kat blade to HT evenly with such small chamber. Knives should be just fine.
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Post by Matt993f.o.d on Aug 12, 2008 14:28:32 GMT
For getting a long heat on large pieces for HTing, I considered making a tuyere extension out of some steel pipe. Block one end off and drill lots of holes in it, then just slot it into the tuyere. My forge is side blast, though, so that makes such a thing easier to pull off.
How did you manage before getting this furnace of yours set up, Sam?
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Post by Brendan Olszowy on Aug 12, 2008 23:42:39 GMT
Good on you Sam taking the plunge. I must google this Parks 50.
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Post by Deleted on Aug 20, 2008 18:31:21 GMT
For getting a long heat on large pieces for HTing, I considered making a tuyere extension out of some steel pipe. Block one end off and drill lots of holes in it, then just slot it into the tuyere. My forge is side blast, though, so that makes such a thing easier to pull off. How did you manage before getting this furnace of yours set up, Sam? The extended tuyere idea works pretty good, but you never quite get a nice even heat, the sideblast forge is great for drawing the steel back and forth. Before, I had access to a big 5 burner propane forge. Brenno: www.heatbath.com/park/products/oil_based_quenchants
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Post by Matt993f.o.d on Aug 20, 2008 22:26:48 GMT
I'll experiment with the two methods, and see which I get on best with.
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