I did it! Hot dog in a bun weld!

Sam Salvati

Sam Salvati

Joined
Aug 6, 2007
Messages
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I did it!!! I successfully pulled of the hot-dog-in-bun weld!!! First time too.

Hot-dog-in-bun is what I call the weld I have seen the japanese use for alot of different tools and knives. It is basically chisel a groove in a bar of mild steel (the bun, in this case 3/4"x1") then fit in a piece of good steel (the hot dog, in this case a piece of 1084 1/2"x1/4") then weld it! Forged a knife too and the weld stayed centered nicely! I will have photo and video of this soon I hope. It cool to see it done in real life too instead of video hehe. The Anyang ate it right up too :D
 
Let me be the first to say, GREAT JOB.

I have always wanted to try that, and just haven't found the time yet.
 
Thanks Chuck! I have been dying to try it too, it's very different from the traditional way of layering steel, no cleaning all mating surfaces then meticulously preparing them it's just bam a groove in the bar then pound the insert in then weld it home.
 
Slammin' Sammy - don't they also often work a fold into a relatively square or rectangular and semi-thick billet and put the other smaller bar inside that? That is the origin of the "jacket steel" and "core steel" in a lot of the katana builds (isn't it?). I have a video on my youtube channel of the swordsmith Pavel Bolf doing that in the forging a katana playlist. I don't have any way to take video of myself, and even if I did, I have only WANTED TO DO THIS!

And yeah - those guys either just don't care about minor inclusions or they get away with stuff I never can. I think about not cleaning a surface there seems to be some slag hiding in the final weld.

Congratulation my friend. That is some kick butt smithing.

kc
 
Nice Sam! I can't wait to see what you do with this one.

Remember, pics or it didn't happen!

-d
 
Kevin yes, pretty much the same as the hot dog in a bun weld, called "kobuse" in Japanese sword terminology except in reverse, soft jacket steel over a hard core. More like an axe, with the bit welded in. I couldn't imagine doing it without a press or powerhammer, it's basically taking 2.5" of 1" square and turning it into 2" wide blade 4" long. I look forward to heat treat! All that cold straightening like they do LOL!

As to slag in the final weld, remember it's only one weld so you are only seeing one weld line, as long as you don't botch up one weld you are in the clear.

One theory I have too is, a common problem with san mai is cracks along the weld line exposed on the spine, with the spine weld internal you have nothing to worry about (I hope). \

Deker, pictures or video tomorrow :D
 
I never thought of the spine weld idea - that's a good theory. You are right, my problems come when I try to do many repeated welds with folding without really thorough cleaning. I always get one or two that don't go "perfect." So, I just grind clean when making billets so I don't worry as much.

thanks for teaching me the kobuse term and difference/similarity. I love this stuff.

You are passionate and talented, and sure have a lot of info for a guy your age (or any age, really). Teaching may be one of your best areas.
kc
 
Great, I'd love to see some pics of the result. Good on ya. I've had problems with incomplete welds showing at the spine of san mai, I'd love to try kobuse type welding too.
 
super cool sam jsut another feather in your cap. im sure ther eare pl that will love to see you make a few blades like that
 
butcher_block said:
super cool sam jsut another feather in your cap. im sure ther eare pl that will love to see you make a few blades like that
Click to expand...

you know why I am trying it Butch :D

Kevin, I've never made damascus other then welding an already stacked billet once then drawing it out into stuff. This site is probably the best on the internet for japanese sword stuff:

http://home.earthlink.net/~steinrl/laminate.htm

Dmitry LOL! OK I'll prove it :D
 
been over an hour and i'm on my 3rd beer!

What does this have to do with making my hammer?
 
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