Testing 003: Full test of wootz blade

Рет қаралды 4,795

Күн бұрын

Пікірлер: 37

@rodneylangstroth4577 2 жыл бұрын

Rod here, of little valley forge. I'd say, this was your best looking results so far. Longer curve to the bend test, than before. Well done Sir

@peterburt7218 2 жыл бұрын

The previous test blades were forged out initially as chef knives so they tended to have more taper in width and thickness. This tends to concentrate the bend in a smaller area, whereas this blade had little taper so bent in a more even arc. It would be interesting to know whether this changes the likelihood of success in the bend test; bending over a shorter length seems inherently bad, but the material is thinner, which means less likely to fracture. Intriguing!

@robertmarley2799 Жыл бұрын

That steel is just beyond words!

@peterburt7218 Жыл бұрын

Thanks! It has been a long process to get where I am today with this material.

@grahamfoulkes7321 2 жыл бұрын

Very impressive tests Peter, felt pity for that beautiful knife undergoing such pain. But all for the good of the craft. Steelmaking is a much under appreciated art, along with the forging, tempering, grinding, polishing and all the steps necessary to produce a top quality blade. May the spirit of Odin be with you in your passion.

@peterburt7218 2 жыл бұрын

Thanks! It is definitely hard to go through the trouble of putting a nice finish on a blade that is destined for destruction, but in the case of wootz blades it is definitely necessary. For those of us who don't have access to metallurgical microscopes the best method of evaluating the structure of the steel is through the appearance of the pattern, and the subtleties of wootz really don't show themselves at lower finishes. The higher finish also aids in the resilience of the blade; every scratch represents a tiny stress riser that could become a crack. When pushing the boundaries of a steel it is good to take every possible advantage.

@HeavyForge 2 жыл бұрын

Nice!! Looks like you nailed the heat treat!

@peterburt7218 2 жыл бұрын

One nice thing about the very low hardenability steels is that it is almost inevitable that a blade will be differentially hardened. This makes the flex test relatively easy as long as the heat treat has been properly matched to the chemistry of the steel.

@jamesmarlier3342 2 жыл бұрын

I cried a little when you bent it. But I wiped the tears before my wife saw.

@peterburt7218 2 жыл бұрын

HAHAHAHAHAHA!

@plankman6408 Жыл бұрын

Can the knife be repaired or salvaged?

@plankman6408 Жыл бұрын

I'm just wondering. I'm watching your videos and loving them! I want to try!

@peterburt7218 7 ай бұрын

These test knives are essentially scrap afterwards, but it is worth it for the knowledge gained. One of my test knives I straightened back out and I use it for trimming trees on my property.

@lynnhall3532 9 ай бұрын

Ed Fowler type of testing. Does it shave a brass rod ? Nicely presented - where did the chicken run off to from last video ? Maybe saw you chopping ? 😏

@peterburt7218 7 ай бұрын

As a general rule shaving of metal rods is pretty straightforward because they are a consistent texture and hardness. The real challenge to a blade is chopping tests since these create dynamic stresses on the edge. I am a firm believer in testing blades in the ways they will be used, which is often quite different than the tests we see on social media. Even the 90 degree test I show here is something of a nonsense test, except that here I am testing the material more than I am testing the blade.

@jean-louis4473 2 жыл бұрын

Hello Peter, very nice!!

@peterburt7218 2 жыл бұрын

Thanks Jean-Louis!

@jean-louis4473 2 жыл бұрын

@@peterburt7218 what the temperature your have quenching and tempering for this knife?

@peterburt7218 2 жыл бұрын

This was quenched in oil from 1450f and tempered at 400f. A few more recent blades from the same material I have quenched from 1475f to get a slightly deeper hardening.

@jean-louis4473 2 жыл бұрын

@@peterburt7218 Thank you very much Peter! That is interesting! Look at your FB, I send you a message.

@weseethetruth158 Жыл бұрын

Well made knife. Maybe just a hair to soft in the temper but damn that was a lot of force...

@peterburt7218 Жыл бұрын

I definitely erred a bit on the side of safety with this one and went a little softer than strictly necessary. With a somewhat variable material like wootz it is more difficult to squeeze every last bit of performance out of a specific blade because small changes in chemistry and forging will lead to different heat treat requirements. For blades that won't be experiencing this type of shock it is easier to push that envelope a bit further out.

@mellamobenjamin 3 ай бұрын

Ear protection but no eye protection 🤔

@peterburt7218 2 ай бұрын

I wear ear protection throughout because the chopping portion is surprisingly loud. I wear eye protection during the bending of the blade, because that is the most dangerous portion. I probably should wear eye protection throughout, but I have yet to find a pair of safety glasses that doesn't distort my vision in some fashion; I decided it was more important to see clearly while chopping since I was confident that the steel would not chip or break during that portion of the testing.

@marcoaureliosilva9335 2 жыл бұрын

YES, I KNOW, IT WAS A TEST AND A SACRIFICE IN THE NAME OF CIENCE, BUT YOU SHOULD STILL BE IN JAIL FOR BENDING IT. POOR BABY.

@peterburt7218 2 жыл бұрын

It's actually back to being fully straight again, so you might see it in a future testing video. I'm planning to try a slightly different heat treat on the blade to see whether I can get it to perform even better.