mpc Posted June 11, 2021 Share Posted June 11, 2021 At about 8:20 in this video he pulls the tool out of the heat and presses it into a white powder (Borax?) before quenching. Can someone tell me what is going on here? Link to comment Share on other sites More sharing options...
ThomasPowers Posted June 11, 2021 Share Posted June 11, 2021 Looks to me like he was trying old fashioned case hardening. Perhaps even with sugar! Link to comment Share on other sites More sharing options...
JHCC Posted June 11, 2021 Share Posted June 11, 2021 Note that there's a cut between the powder and the quench. If Thomas is correct about the case-hardening-with-sugar hypothesis (which would be, let's face it, pretty sweet), I'm guessing that there's some amount of time (and possibly multiple heats) not shown in which the tool could be absorbing carbon from the powder. Link to comment Share on other sites More sharing options...
anvil Posted June 12, 2021 Share Posted June 12, 2021 Case hardening is as good of a guess as any. I don't think it would work, tho. Good point, JHCC. Along with that, we don't know what kind of stock it is. I'd guess it's from an axel My guess would be some sort of Super Quench. But I don't think either guess would do anything worthwhile. Link to comment Share on other sites More sharing options...
pnut Posted June 12, 2021 Share Posted June 12, 2021 I'm with Thomas but if I had to make a different guess I'd say it was some sort of insulation for a differential heat treat like claying a blade. Pnut Link to comment Share on other sites More sharing options...
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