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Drum Forge Question


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#1 John Frankl

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Posted 05 April 2007 - 07:43 AM

Hello All,

I am heat treating longer blades in a Fogg drum forge and loving it. With a T-Rex burner, it holds temp +/- 5 degrees from 1600 down to tempering temps.

But I now have a blade considerably longer than the drum (about 122 cm). Now I have seen nice photos of Randall Graham "stroking," and video of Walter Sorrells doing the same, albeit in a longer forge. My question is this: I am going to have to do some stroking to heat the entire blade evenly. Can I keep the forge dialed to my austenitizing temp, or will I have to go hotter and just keep the blade moving faster?

Thanks,

John

#2 Jesse Frank

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Posted 22 May 2007 - 08:26 AM

Hi John,

You'll have to go hotter. I've been meaning to add an extension to my drum forge for a while now....... :)
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#3 R.H.Graham

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Posted 22 May 2007 - 08:54 AM

Yeah, stroking works best with a short but intense fire, just gotta keep movin. I find it works best if you go up in stages, I take the blade to a nice sub-critical red and get it all nice and even there first, then add gas a bit at a time till the edge shows the flare, or just starts to become non-mag, then hold the fire there and wait to see if the rest of the blade comes up... if it doesn't I add just tiny amounts of gas till it does.
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