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its re hardening and if i search the forge i may get you a better answer
or just do a search.

if its thick enough not to warp it could be done
not counting guessing on steel propertys
and i would think it would have to be pretty close to wedge shape

Disclaimor: i have not tryed my hand...

I think i can say sorry for your loss

and now im wondering how someone managed that heat pattern