can you differentially heat treat infi?

Josh Muller

Josh Muller

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Jun 22, 2003
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just wondering what properties infi has at a lower hardness... specifically for the busse swords: were destructive tests done in the designing process of them?

given that the things id put it through are soft objects, were it to be unintentionally stabbed into a concrete wall behind said object, how would it react at 61 on the rockwell scale? would it be better differentially heat treated, or is infi not good at lower hardness's? :confused:
 
I believe Jerry said there were no swords made in infi, all A2. I could be wrong, it wouldn't be the first time.

Rob
 
I'm pretty sure there was a post showing one (if not the only) INFI AK leaving the shop. It was part of a much larger order, can't remember who it was for though.

IIRC, it was satin finish, tube fasteners, and camo micarta.

Anyone else remember the pic? Had some argonnes, AD's, Mojo's, etc...on a picnic table in a winter setting?
 
:confused: :confused: Not a good pic, but those fasteners look solid to me. A pile of infi like that had to be going to either Skunk or 1WB. Lot of $$$$$ on that table. Perhaps the owner will chime in.

Rob
 
I imagine you could differentially heat treat INFI if you wanted, but it will bend past 80 degrees at a through hardness of 59-60 rc; why would you want to?
 
eh, having your sword snap on you means you die :rolleyes: ...

the amount of pressure and sometimes torch put on a sword that it takes to cut through a thin of armor or chain mail, through a body, is pretty immence, and should that pressure be put to a hard object, at full potential (on accident, or if you had to go through something of that nature to get to your target), i just wonder wether infi will performat the level of a differencially heat treated sword of a different steal, infi being fully hardened.

and if it will snap slightly before a differencially heat treated sword of the same lenghth, would there be any additional performance to be had form leaving the spine soft, or does infi go to putty/just not do what its supposed to when its left at 40-45rc.

infi will take an 80 degree straight lateral bend, but how will it do against a circular torch+bend, compared to a differencially heat treated sword? (/how will it do on a circle torch at all.. havent read anything on that yet...)



just wondering :) looking into custom swords (+the history, shape etc) slowly, and my love of busse knives makes me look here first, while checking out other modes....
 
Seth,
Interesting thoughts. However, I wouldn't be too concerned about INFI, I'm sure it is able to handle it. I know the DF is INFI and I'm sure Jerry wouldn't have used it if it wasn't the best material for that project.

Swords are definitely interesting and it would be great if Busse started making a few more again

:D:D
 
Could someone post a pic of the DF? That is a nice blade. I still feel sorry for the guy that had it made, and then had to sell it.:(
(I'm sure Chuck feels real bad about it too).
 
df?

that was the hardest to read post ive ever put up on blade forums...

while i was at work today, i was thinking about the dif heat treat on swords, and why it would be better then infi... and the only thing i could think of was hard fast impact, mainly straight on. and the only crazy explanation i could give, would be that the soft steel spine of a dif heat treated blade could compact in on itself a little, or expand out, allowing for a little more leaway in the blade when it smacked something hard. however, there is still the chipping aspect.

wich is why im so interested in infi for a sword steel....

and thinking of all this, i realize just how very little i know about swords. mainly, it comes down to this - would the performance on a 30,000$ custom forged sword be better then a 6,000$ (probably less) infi sword?
 
We have tried differentially treating INFI for testing purposes in the past, but have yet to be satisfied with the results. The high amount of chromium in INFI does exactly what it is supposed to do, and that is to transfer heat throughout the matrix for deep hardening. This, in turn, makes it very difficult to either raise or lower the hardness of the edge or spine in a narrow blade profile such as found in a traditional style katana or wakizashi.

Notably, we have never had an INFI blade snap under high impact in our destructive testing, which has been very extensive and "over the top". These tests have included several sword blades.

More importantly, perhaps, is the fact that INFI has proven to be indestructible when used for prying the tabs off of CBL cans! :eek:

Now that's "real world" testing!!!!!

Jerry
 
Originally posted by Matteo Escobar
Could someone post a pic of the DF? That is a nice blade. I still feel sorry for the guy that had it made, and then had to sell it.:(
(I'm sure Chuck feels real bad about it too).
Click to expand...


There are several on my site...I'll post links at some point today.
 
ah, dragons fang :D i have seen it before, just didnt know the acronym... i dont know about how the finger knoches would feel in use, but good gravy... that thing is goergious....


and to show how much even a little research can do, within 2 pages of reading, i found out that most of the japanese swords were actually several layers of sandwiched steal of varying hardness's -

(shoshu kitae gif wont post, so ill just leave the url for the page)
"The famous sword smith Masamune used the "Soshu" seven layer construction method."
"http://www.geocities.com/alchemyst/laminate.htm"

wich... would seem to me to make the sword worlds stronger as far as its ability to take stress..., while keeping the outer moost parts hard... a highly simplified damascus, but agian, since i know nothing of these things, this is all speculation and wonderment.
i wonder, how does infi laminate/take welds to other metals?


needless to say, THANK YOU JERRY :D :D :D

that does add immense amounts to my desire to get a busse sword :). actually it makes it kind of hard for me to not get one... :( :D stupid minimum wage... at least i still have time :cool:
 
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