Blade Geometry x Blade Steel

bg81la

bg81la

Retailer / Enthusiast
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Aug 24, 2021
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I'm interested in learning more about the relationship between blade geometry and blade steel, in terms of how to choose the right blade steel for a given blade geometry. I've seen some interesting analyses on tests of different blade steels for toughness, edge retention, etc - but what I'm wondering is which qualities (and hence which steels) are best suited for different geometries, grinds, shapes etc. If there is an existing thread or article out there that covers this, please let me know - thanks!
 
Is there going to be a quiz at the end of class? 😐
While the 2 design features DO intersect: they don't really work together until you also add in the intended use of the knife...
 
Hardness correlates to how thin you can make the edge without deformation.
Toughness correlates to how thin you can make the edge without chipping.

With those two parameters you can get a relative idea of how different steels and heat treatments will perform relative to each other in same geometry.
 
Bob Denman said:
Is there going to be a quiz at the end of class? 😐
While the 2 design features DO intersect: they don't really work together until you also add in the intended use of the knife...
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Okay, but if Big Brown Bear, Larrin and Michael Christy board a train in Philadelphia at 7:43, and Big Brown Bear is carrying a homemade bundt cake, and Larrin is wearing a cardigan sweater, and Michael Christy has a 2 oz. bottle of diamond spray, and the train is traveling at 43 m.p.h. but has to slow down in Cleveland because Michael Christy gets depressed about putting a 14 degree angle on a Spyderco Salt that he knows is going to roll all over the place, then the train has to speed up near Joliet because Larrin's wife called to tell him that 4,000 "I Love Magnacut" cotton t-shirts just arrived at the house and the shipping pallets are blocking the driveway, and Big Brown Bear makes a deal with an unknown passenger to trade his bundt cake for an old Arkansas sharpening stone, who gets to Chicago first? Hint: The unknown passenger is not preparedmind101.
 
Alberta Ed said:
Buy Larrin's book Knife Engineering.
Click to expand...
I’d do it long time ago, lm following his posts and BBB on IG, unfortunately big part of the book is just specifics about tempering and chemical compositions of different steels, lm not very interested of those…
 
Mister Coffee said:
Okay, but if Big Brown Bear, Larrin and Michael Christy board a train in Philadelphia at 7:43, and Big Brown Bear is carrying a homemade bundt cake, and Larrin is wearing a cardigan sweater, and Michael Christy has a 2 oz. bottle of diamond spray, and the train is traveling at 43 m.p.h. but has to slow down in Cleveland because Michael Christy gets depressed about putting a 14 degree angle on a Spyderco Salt that he knows is going to roll all over the place, then the train has to speed up near Joliet because Larrin's wife called to tell him that 4,000 "I Love Magnacut" cotton t-shirts just arrived at the house and the shipping pallets are blocking the driveway, and Big Brown Bear makes a deal with an unknown passenger to trade his bundt cake for an old Arkansas sharpening stone, who gets to Chicago first? Hint: The unknown passenger is not preparedmind101.
Click to expand...
And the answer is, Yes?
 
They're all good steels. The answer is which ever steel you can work the best is the best one for you to use.

Don't go chasing minuscule improvements by way of new materials.
 
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