Hand Tools

Subject:
optimizing hardness and toughness

Bill Tindall, E.Tn.
Warren could no doubt find the post but more than a decade ago when I was following chisel failure with microscopy I made the claim that the best chisel steel would retain toughness at high hardness to optimize trade off of folding and chipping. I retained the photomicrographs of chipping M2 and folding Sorby. It may well have been this work that led LV to the steel they now use for it excels in this trade off. It certainly is what led us to CPM 3V.

Trying to find this optimum with the number of variables you are changing with no measure of hardness, and a heat treat capability that is of unknown variability, would seem impossible. Trying to pass information to someone else on how to achieve the optimum you find would indeed be impossible.

If you think you have a better chisel the proof is to realistically test it against the best commercial alternative you know of.

I remain confused by this quest. If personal, fine. None of my business what one spends their time at. But you keep posting details of this journey which suggests you expect these details should be of some value to others. I'm lost.

You showed us that a small convex bevel would turn a pedestrian chisel steel into one that would complete a set of drawers. You have used this discovery to turn any chisel you make into one that works.
This fact would seem to end the quest for a novel steel. Whatever improvement in steel that can be found will be small relative to the effect of the details of how the edge was prepared. That was the end of my interest in steel and I was the person that retained an interest in steel for a decade or more.

Messages In This Thread

52100 experimentation continues *PIC*
same chisels. *PIC*
Re: same chisels.
The reason for the choice...
Re: The reason for the choice...
Better than O1
relying on the charts...
caveat on my sharpening perceptions..
Re: caveat on my sharpening perceptions..
Re: caveat on my sharpening perceptions..
Thanks!
for the non-metal folks..
"through hardening"...
Re: same chisels.
Re: same chisels.
Re: 52100 experimentation continues
These get a trip to the freezer...
Re: These get a trip to the freezer...
if it's like the machine areas...
Maybe toughness *isn't* .....
Re: Maybe toughness *isn't* .....
A stake in the ground is needed
Re: A stake in the ground is needed
There's an absolute property..
optimizing hardness and toughness
Discussion and personal value
now I am confused more
Re: now I am confused more
Re: optimizing hardness and toughness
Thank you for the search results
Testing three chisels..
re-do with one of the (52100) chisels
question
Re: question
26c3 mule...
For those like me unfamiliar with 26c3
Re: For those like me unfamiliar with 26c3
Re: 26c3 mule...
Re: 26c3 mule...
Pictures
pics... *PIC*
(looking back at those four pictures...
When work pressure lets up some,
It'll look the same...
Re: pics...
Re: pics...
Deflecting vs. letting go
I think that's pretty much it...
Re: Deflecting vs. letting go
Re: Deflecting vs. letting go
I didn't check with a metallurgist..
26c3 pictures vs. ward later...
not that much later...the 26c3 *PIC*
Tempered to 380F? *NM*
Re: Tempered to 380F?
and the ward *PIC*
Request
Sure...
Temper temperature...
too much?
Re: Sure... *PIC*
Re: Sure...
David's knife
Re: David's knife
short follow up thought....
Re: short follow up thought....
Re: short follow up thought....
Re: Sure...
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