I think Infi might have done better...

[resinguy]

Doh!!

In my defense, and in the best traditions of our forum, I must confess to a few fingers of bourbon.....

... or more....

 

[Aias]

Wow, that almost looks like a serrated edge. Maybe a pic of the whole blade vs the close up will help give a fuller impression of the damage. In any case, you may stray, but ya always come back!

 

[Gaston444]

Part 1:
So my son, who is a card carrying lifetime member of MENSA, gets a stereo microscope from his grandparents for Christmas.

Part 2:
In these Infi lean times, awaiting orders to fulfill, I pick up a trendy knife that is so popular right now they are almost impossible to get. It is a very well thought of a hard use knife and features 3V with the latest magical heat treatment. After using it to shred some Christmas cardboard for recycling (which in fairness it did exceptionally well and kept its sharpness) it gets knocked off the window ledge in the garage onto a concreted floor (about 3 ft high).

Now this is not catastrophic and it will sharpen out with the Kalamazoo, and I think this 3V/HT combo will probably be more wear resistant than infi, but I don't think I would have seen all this chipping on an Infi blade. Steel is all about tradeoffs, you can't have it all, and these high hardness, wear resistant, supper edge holders have a price.

my punishment for straying

P.S. I am gonna have more fun with this microscope than the kiddo; more edge pics will surely follow.

These chips are far too numerous and close together to be from a single fall. They don't show any of the signs you'd expect form a fall...

They seem more like they have been caused by abrasive wear while cutting, such as you would find in tough dirty cardboard, or even fiberglass material...

Fall damage would not start/stop like this at such a high pitch, but have broader more widely spaced features, and more long flat spots or large chips than many small chips like here.

Gaston

 

[mach 5]

These chips are far too numerous and close together to be from a single fall. They don't show any of the signs you'd expect form a fall...

They seem more like they have been caused by abrasive wear while cutting, such as you would find in tough dirty cardboard, or even fiberglass material...

Fall damage would not start/stop like this at such a high pitch, but have broader more widely spaced features, and more long flat spots or large chips than many small chips like here.

Gaston

Well, as I said, I was cutting cardboard boxes just before the knife fell, but it was fairly light and clean Christmas stuff, not dirty industrial heavy duty cardboard. Also remember that the knife bounced several times before coming to rest on the concrete. I am convinced the chips are from the drop, but if they are from the weak cardboard I cut before, then that is even worse! It has not ever cut anything that should do that to the edge.
It has not cut carpet, fiberglass, dirty cardboard or anything else stressful.

 

[dieseldog]

Now I want a microscope.

 

[dogboye]

So have you sharpened those out yet? If not... have you tried the edge in cutting anything?

 

[Father & Son Traditional Sharpening]

Well, as I said, I was cutting cardboard boxes just before the knife fell, but it was fairly light and clean Christmas stuff, not dirty industrial heavy duty cardboard. Also remember that the knife bounced several times before coming to rest on the concrete. I am convinced the chips are from the drop, but if they are from the weak cardboard I cut before, then that is even worse! It has not ever cut anything that should do that to the edge.
It has not cut carpet, fiberglass, dirty cardboard or anything else stressful.

There is no such thing as clean cardboard, IMO. it is all littered with abrasive particles that can cause stress fractures… especially if doing very fast cutting which creates impacts. It's kind of like cutting sandpaper, but on a much smaller scale… due to abrasive volumes being different. It is in the same category as the carpet, fiberglass… though not as severe.