Ttrees":a5w9pt1s said:Thanks Trevanion
As you said it might be serviceable anyway as it is.
I wonder if this (if it's just the one) chisel was a bit too hard to begin with?
Not that I'm used to having vintage steel chisels, but I have an old vintage chisel that seems really hard in use, compared to the modern Stanleys I use.
It holds an edge really well but never seems to get quite as sharp as the modern ones I have.
I use this one for the last pare down to the line all the same, as is nice and nimble.
Is it unheard of that some vintage chisels could be a bit too hard?
Thanks
Tom
Late and didn't read the answers from others yet, but probably too hard with an outside chance of it being steel quality that won't improve with lower hardness. Put it in the oven for half an hour at 350F, then use it, increase 25 degrees for 1/2 hour in increments and test after each until it performs like you want it to.
when I make chisels (which has only been a few so far, but I'm aiming for something very specific), I shoot for them to be as hard as they can be without chipping because it makes the sharpening process sublime (the chisels don't hold a wire edge much at high hardness). When the magic spot is hit, there is a drastic difference between that spot and the spot 25 degrees cooler in temper (the latter being the type of edge that leaves lines on work after not much paring, and the former having no such behavior at all).
I had an older second tier brand chisel here (lakeside) that exhibited the chipping behavior, though, and hammered it into a shop knife to try to make something decent out of it, and despite hammering and reheating, it's still only marginally useful and likes to shed its very edge. Same for some defective razors in the past - the issue in those probably existed at the steelmaking, and not in the heat treating.