440B hardness

[FredyCro]

Even with top-notch ht: 15dps Edge whittles elk antler is quite a challenging test. It requires high strength and full elastic range in order to dig into the antler w/o deformation/failure. This is something easily test by anyone.

RA (fcc structure) isn't strong nor has full elasticity range. Grain growth is almost not a concern for high alloy steels because there are copious amount of grain pinning element/particle in solution (aust matrix).

Just to be clear - for this demo, I applied part of my R&D sequencing IP, hence won't disclose the 'how'. Although using simple tools (weed burner, toaster oven, freezer), complex technique were conducted. Perhaps point being, barrier to entry - equipment wise - is low. You've better setup, so now just matter of think & tinker.

Here is S30V 62.5rc with 13.5dps edge performs same tests - result: passed!

Your videos are on point and its really cool to see it work in tests, but why not share your protocol (EDIT) with everyone? It's not really rocket science. Also, feel free to become a bit more abusive with your test, i am always interested about what an edge can not do more then what it can do (that's how i test my blades).

I am looking forward to the comments of the nay sayers

 

[Natlek]

Your videos are on point and its really cool to see it work in tests, but why not share your protocol (EDIT) with everyone? It's not really rocket science. Also, feel free to become a bit more abusive with your test, i am always interested about what an edge can not do more then what it can do (that's how i test my blades).

I am looking forward to the comments of the nay sayers

I don t think that I will share if i know what bluntcut know about HT .
Fredy , when you have time look in this thread from bluntcut . You would not believe what bluntchut does with steel.......................................modern science is a miles behind his achievements

Heat Treatment - Crystal Weaving Foundation

BluntCut MetalWorks heat treated steels attributes (referenced context below) are based on my Crystal Weaving Foundation(CWF). CFW has graduated into a small contribution to science. It will open a door to go outside of the current industry ht box/room - a broad area and depth to be explored by...

www.bladeforums.com

 

[DevinT]

I once forged a chopper out of 440c and heat treated it with an oxy-acetylene torch and then demonstrated that it could pass the ABS chop and bend test. The ABS was angry that I did it with a steel that they considered un-forgeable, yeah it can be done.

I see a lot of threads here that want to know what the best steel is, the best grinding technique, the best abrasives, the best epoxy/adhesive, the best handle shape, the best way to do every part of knife making.

I find it interesting that when it comes to heat treating, there are lots of threads that want to know if you can get by using a forge for high alloy steels, or do I have to use foil, is cryo really necessary, are hardness files accurate, can I use a vegetable oil to quench in, can I temper using a torch etc…

For some reason heat treating seems to be the step child of knife making.

Lots of knife makers don’t care whether or not it is a poor, adequate, or optimally heat treated blade. It just doesn’t make sense to me to buy or make a high end custom knife with a less than the best heat treat possible.

Heat treating should get a little more respect sometimes.

Hoss