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Posted by MatthewK on February 19, 2007, 4:11 pm
Please log in for more thread options On Mon, 19 Feb 2007 13:23:40 -0700, heChas wrote:
> Thanks for the pics. That's a neat setup...just right for knifes I imagine.
> What type of wool and surface hardener did you use? And where can one buy
> them online? Again, thanks.
>
>
>
Thanks, I ended up buying everything from Darren Ellis. The pottery sites
I saw only sold the refractory coating in large quantities. I figure I
was keeping money in the "comunity too. Pottery sites carry all the stuff
though. I used inswool and satanite for the refractory coating.
Last night I was playing with heat treating 1095.....it didn't go well at
all. First I think the bernzs-o-matic tank is too low and the preasure
isn't as high as it could be....maybe not. Anyway, the forge didn't seem
to get really hot or heat to evenly. The outside temp. was somewhere in
the low teens that night....maybe lower. Then I was quenching it hot water
140 degrees to 150...which was too slow I think.
Maybe the metal wasn't hot enough to begin with.....but after the quench
it came out bendable. If the metal temp was lower than optimal...it still
should have been brittle.....I think. If the metal wasn't critical, it was
close. I quenched the end of a file that was above critical....hit it with
a hammer a few times and no breakage.
I think the water quench was the main culprit.....I'm going to hook up a
larger propane tank to the forge and try again with slightly cooler water....
When I quenched it the hot water, I could see the glowing steel for a few
seconds....I think I need a less stable vapor film so I'll try cooler
water. I moved it around and everything...still glowed red.
The test pieces where 1/8 inch thick and an 1.5 inches by 1 inch.
I need to get some oil. I still think I need to get a charcoal setup for
heat treating and use gas for forging. :)
matthew
ohio
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