We put our heat treat to the TEST

Angelo and Skye have been working hard (no pun intended) to IMPROVE our heat treat process. We recently introduced cryogenic treatment and a second temper cycle and wanted to see what difference it made compared to our old heat treat recipe. In order to validate their theory, Angelo and Skye went to a local metallurgical lab and had a new blade and old blade tested in various ways. In this video, they talk about the new process, explain the tests they had done and break down the results.

A HUGE thank you to Fredrick Haakonsen for all of your help with the testing! You are the best!

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Gear we use:
Canon M50
Zoom F1-LP Field Recorder
Rode VideoMicro Directional Recorder with Dead Cat
JOBY GorillaPod Compact Tripod with Ballhead

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Fan-Made Intro from: @zblade_opener (Martin from Slovakia, thank you!)

[JohnGrimsmo]

A HUGE thank you to our friend Fredrick Haakonsen out in Europe who helped us a TON with this testing!

[FearNoSteel]

There is always retained austenite in these kinds of steels due to the alloy, kinematics and morphology. it's just reduced with Cryogenics. Need x-ray diffraction to really see RA. Can't see at 500x or really at 1000x it's in-between the small gaps of martensite needles in the grain as small gummy patches, the etching doesn't show that, just highlights the carbides and sometimes prior Austinite grains. The Carbides with your improved HT are finer thanks to the higher Austenizing temperture dissolving more of the M7C3 Chromium Carbides, those are those white dots in rwl34. it's two fold, Putting more alloy in solution with higher Austenizing temps needs a cryo to help fully convert to MF. Technically more RA would make the knife more tough and ductile especially with impact, but cryo will improve the stability of the edge which is better for a folder.

[kknives_switzerland]

Since when do I have a laboratory?😄 Anyways; glad to see that you could make use out of my inputs👍

[robindriscoll]

Can you do a demonstration of the cryo process? I enjoyed the video you put together showing your previous method of HT. Seeing how you do Cryo would be very interesting.

[bcbloc]

Ever consider induction hardening the edge and leaving the rest of the blade soft for maximum toughness and hardness where it counts?

[brunoflior]

I understand that changes are going on constantly but I would like to know where my Norseman fits in. Would you break down the changes vis a vis the serial number of our blades? That would be interesting.

[lukew.]

What number Norseman did the cryo blades start?

[DanielPierce]

Have you guys ever considered molten salt bath heat treat?

[elgato]

Around what born on date/serial number did you begin cryo treating noresmans? Way to keep improving!

[Benjamin-xvhg]

first of all great info.


if you 3d printed that new mic holder you should consider printing it in 2 parts and run a small grove up the middle of it to run the cord up it, add two screw holes into it in case you have to replace the cable or if you use it for other things. i think that it would make i look a lot better and this is grimsmo knifes you guys are the definition of perfection. Keep up the great videos really wish you did more. The info that everyone has in that shop is crazy.


 you should consider floatplane, it is linustechtips attempt at a video service. Would gladly pay to help make more videos and I'm sure many of your fans would as well. Oh yea and he is from Canada as well, his team has a little shop.

[paulmace]

Edge retention is a nice goal but it would seem to me toughness would be important too in preventing catastrophic failure. With your problems with throughput in the production process is this additional step(s) worth the effort?

[tacticalcenter]

Went from wish to Walmart version of rwl34. How much do these knives cost?

[SuperSteelSteve]

So awsome to hear that the collaboration with kknives_switzerland turned out so well 👊👊👊

LOVE seeing two companies come together to take that extra step... we all win👊👊👊

[jamesm]

John 62hrc is more ideal for rwl, you're not using it to it's full potential steel wise at 59-60hrc. Cheers fifty50 knives

[spanierjuan]

How can there be over 20% less manganese in the Analysis compared to the specs of the RWL34?

[Wunderbolts]

A poor mans liquid nitrogen that I’ve seen for shrinking parts to fit is alcohol chilled by dry ice. It was a one off and we didn’t want to have to deal with a dewar. I don’t know how it would work for cryo treating blades, though.

[tacticalcenter]

Send a few different ht blades to @outpost76 on ig or yt. He does cardboard cut testing and has a lot of data comparing various brands of knives.

[aray]

Very cool u guys are always working towards perfection and that’s why one day when I’m able to afford it I will buy one of your knives. Oh and a pen as well! Lol! I think u guys are an amazing company my hats off to all your effort thanks for being so incredibly awesome 👏👊👍

[pco]

Crogenic redings are tough... 😉😄 Thanks for the in-depth on this, and for sharing at all.. there's a bunch of guys being "elite" about what they're doing out there...

[hellohun]

How many angels can stand on the head of a pin.