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Bill Burke
03-08-2012, 01:31 PM
I think I can do it. What do all of you think?

san mai 52100 core 416 sides.

310mm length, 47mm at heel 3mm at spine above heel.

http://www.fototime.com/088958279CB0BDB/standard.jpg



:scared1::scared4::Ooooh::eek2:

http://www.fototime.com/6F7A40EDE0D5507/standard.jpg

oivind_dahle
03-08-2012, 01:32 PM
Damn!

Turn it into a fork!

clayton
03-08-2012, 01:32 PM
WOW! I only saw the first picture at first and thought "fixed - what needs to be fixed?" and then I saw the second. Holy Cr*p!

l r harner
03-08-2012, 01:36 PM
neat trick making 2 knives out of one :(

tkern
03-08-2012, 01:38 PM
No need to fix it. Its a "Bunnisuki". Traditional Japanese knife for breaking down rabbits.

Andrew H
03-08-2012, 01:39 PM
Wow, that's incredible.

Michael Rader
03-08-2012, 01:40 PM
Let me guess, that didn't de-laminate, did it? It actually ripped the core apart. I saw a blade tear apart like that that Ed Schempp made, so that's my guess. How to fix it? Hmmm, I'd be interested to learn how.

-M

Bill Burke
03-08-2012, 01:46 PM
Let me guess, that didn't de-laminate, did it? It actually ripped the core apart. I saw a blade tear apart like that that Ed Schempp made, so that's my guess. How to fix it? Hmmm, I'd be interested to learn how.

-M

Yep split the 52100 right down the middle. As I sit here typing I can here it continue to split. I have seen this happen before also but this is the first time it has happened to me.

Dave Martell
03-08-2012, 04:19 PM
Dayam! When did this occur, what part of the process?

DeepCSweede
03-08-2012, 04:52 PM
that thing would peel both the breasts off a pheasant in nothing flat!! Only problem is how to hold the bird.

chuck239
03-08-2012, 07:10 PM
This photo made me so sad when I saw it it my email. I was a little confused at first because the second photo didn't download. But I could see a small bump on the edge in the first photo.... Then the second photo downloaded on my phone and I realized it was over for my knife. :sh*thitsfans:

-Chuck

Bill Burke
03-08-2012, 08:45 PM
If it mAkes you feel better chuck I have another forged out now

Eamon Burke
03-08-2012, 09:00 PM
It ain't over! I'd seriously consider taking this instead of a working knife. That is crazy cool. What a conversation piece!

HHH Knives
03-08-2012, 09:47 PM
HOLY SMOKES!! thats WILD Bill! I have never seen anything quite like that B4.

Almost makes me feel a little better about the micro chipping problem with my stainless san mai test blade.:( Im sure your new blade will work out better..

Much respect,
Randy.

Bill Burke
03-08-2012, 09:55 PM
I am not sure what happened on this. Everything was fine after hardening. Then into cryo and when it came out there was a crack on the spine. As it sat on the bench ping tink crack it started to split And I am not sure if it's done yet.

PierreRodrigue
03-08-2012, 09:59 PM
Wow! The stresses must be insane!

Bill Burke
03-09-2012, 11:23 AM
this knife ended up splitting clear from tip to tang and edge to spine, almost perfectly in the middle.

Craig
03-09-2012, 11:50 AM
A new technique for creating single-beveled lasers in half the time?

Erik "Shrek" Fritz
03-09-2012, 03:01 PM
just add more flux, that stuff is like glue you know.

ajhuff
03-09-2012, 04:31 PM
JB Weld.

-AJ

HHH Knives
03-09-2012, 05:15 PM
JB Weld.
-AJ


:spitcoffee:

tk59
03-09-2012, 07:39 PM
Amazing! Sorry, Chuck! :(

Crothcipt
03-09-2012, 07:50 PM
Just curious at what they look like where the split is. And what are you gonna do with them?

Bill Burke
03-09-2012, 09:03 PM
Just curious at what they look like where the split is. And what are you gonna do with them?

Not exactly sure what you mean. But it looks like a nice clean satin break Probably just going to leave it hanging around the shop for a show and tell thing.

Crothcipt
03-09-2012, 09:06 PM
What I was meaning was the sides of were the 2 pieces used to meet. Its probably nothing to see. You only have a pic. from the top.

Bill Burke
03-09-2012, 09:22 PM
OK that is what i was thing but wasn't sure. looks like a nice fine grained break. I'll see if I can get a picture.

jmforge
03-09-2012, 11:54 PM
DANG!!!! I tried welding up 416 and Cru Forge and it just never stuck, but that is funky the away the core split. I think I recall one of the guys who does that a lot saying that you might want to clay up the spine on those laminates because the do get stressed all to hell in the quench. Derrick Wulf made a san mai blade recently using 304 as the cladding instead of 416 and he says it welds a lot easier. It also isn't martensitic steel , so I wonder if it gets stressed out less.

rhygin
03-10-2012, 02:37 AM
The fact that it crack is so symmetrical is really interesting. It seems improbable the the stresses would be so balanced and that the core steel would be the weaker element. As far as I'm concerned, this is an endorsement of your method (ignoring the obvious), that you can create something so balanced.

Bill Burke
03-10-2012, 10:49 AM
When I first started doing this laminate in 2002 I was talking with Daryl Myer and was told by him that this could and would happen. According to Daryl it is far more likely to happen with 300 series stainles than with the 400 series that I use and the reason that I use it in the first place. For those of you who don't know who Daryl Myer is Pretty much every modern pattern welding technique that we use in some way belongs to Daryl.

Burl Source
03-10-2012, 11:23 AM
I think you have a great piece of modern art there.
Now you just have to figure how you will display your new sculpture.

http://www.fototime.com/6F7A40EDE0D5507/standard.jpg

jmforge
03-11-2012, 03:21 AM
Okay, now I am even more anxious about trying it again. :bigeek::big grin: I have had the opportunity to talk with Daryl at Blade a couple of times and he is truly one of those living treasures we talk about and a heck of a nice guy to boot.
When I first started doing this laminate in 2002 I was talking with Daryl Myer and was told by him that this could and would happen. According to Daryl it is far more likely to happen with 300 series stainles than with the 400 series that I use and the reason that I use it in the first place. For those of you who don't know who Daryl Myer is Pretty much every modern pattern welding technique that we use in some way belongs to Daryl.

Mike Davis
03-13-2012, 09:19 PM
Bill, i am still amazed at this happening. Aside from the obvious bummer, i think this could be used as a great learning tool, and one hell of a display piece :D

Don Nguyen
03-21-2012, 03:14 PM
Wow. Quite incredible...

StephanFowler
03-31-2012, 08:35 PM
Burt Foster has some superglue that might help you out


:curse::justkidding::curse:

Delbert Ealy
04-01-2012, 01:28 PM
Bill,
Did you temper before cryo? If you did not then that is your culprit. Another is that your oil is a bit fast leading to increased stresses. If you heat your oil prior to quenching try leaving it cold(room temp) next time.
Thanks,
Del

Bill Burke
04-07-2012, 03:56 PM
Thanks Del, I did not temper before cryo but I never have in the past and I am using texaco type a which is a pretty slow oil. Basically the only thing that I did different from what I have done for the last ten years that I have been doing this is to go into the LN2 as soon as the blade reached room temp instead of waiting my normal 24 hours with the blade in the freezer. I did it this way because it is supposed to enhance finer carbide precipitation in the grain boundaries.


Bill,
Did you temper before cryo? If you did not then that is your culprit. Another is that your oil is a bit fast leading to increased stresses. If you heat your oil prior to quenching try leaving it cold(room temp) next time.
Thanks,
Del