How would you make this knife?

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Natlek

Joined
Jun 9, 2015
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I can't describe how much I like the design of this knife. If it is offered in better steel I would buy it tonight no matter how much it would cost !
From stainless steel ? If I have a thick enough piece of stainless steel it would be easy , but very expensive . Forge welding an additional piece of steel / of the same material / where thickness is required ? But stainless steel harden in the air , so during welding whole steel will harden ???
Any idea how ?
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Integral bolsters are often forged out of one piece. Salem Straub and others frequently forge weld the bolster pieces on, but still part of the forging process.
 
weo said:
Integral bolsters are often forged out of one piece. Salem Straub and others frequently forge weld the bolster pieces on, but still part of the forging process.
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If it is from carbon steel I can easy weld bolster , but on Stainless steel ?
 
I know plenty of guys who arc-weld and TiG weld stainless, why isn't this a possibility if not forge-welding?
 
weo said:
I know plenty of guys who arc-weld and TiG weld stainless, why isn't this a possibility if not forge-welding?
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I am wizard with Tig Weo , but what that would done to steel structure ?
Daniel Carraher said:
Or you could forge weld them and do an anneal after in something like AEBL
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How you would do that ? I should weld the entire perimeter , just like we do for san mai ?
 
Natlek said:
I am wizard with Tig Weo , but what that would done to steel structure ?

How you would do that ? I should weld the entire perimeter , just like we do for san mai ?
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With tig I’d fusion weld them and then use a press. Just need to hold them together long enough to press
 
Do I look well and understand what they are doing? They seem to be welding a bolster to steel in air ?
Watch from 2 , 38 ??
 
Welding it on shields it from oxygen. They aren’t welding it. They are using a press to forge in the bolster area, like most who forge integrals. They are just using robots
 
Daniel Carraher said:
Welding it on shields it from oxygen. They aren’t welding it. They are using a press to forge in the bolster area, like most who forge integrals. They are just using robots
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For that I need to weld bolster all around which mean from blade side also , I don t like that idea at all ..................
So they welded bolster before that and here they just forge and cut to shape , make sense .So question is how they do that :)
 
Natlek said:
For that I need to weld bolster all around which mean from blade side also , I don t like that idea at all ..................
So they welded bolster before that and here they just forge and cut to shape , make sense .So question is how they do that :)
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They forge the bolster in the press. It’s not welded.

Fusion welding the bolster on would be no issue, the welds will break away when you forge weld it anyways
 
so most integrated knives like that are drop forged.. where the bolster is forged in at the same time the blade is shaped.
so basically there are 2 or more dies that start the bolster shape and the blade at the same time.
then they are forged a second /third time in just a few minutes. to finished shape..
i guess if you were to try to weld the bolster on you could with TIG welding and the same metal as the blade.
most likely have to anneal the steel and bolster after welding it on ..
 
When i did a course with R Kappeler in Salzburg I remember seeing stacks of machined or stamped large plates that had raised/taller sections for an integral bolsters on each side and top and bottom of the handle. He mostly uses n690 so I guess these were custom made by Boehler for him. Maybe if you ask Boehler or him you could get a piece somehow. Check his website and yoh will see what I mean.

For home use I think a deep weld with stick welder and stainless rods and then normalize/harden/temper in oven. Maybe try on scrap to see if it would still be brittle or prone to rust after tempering?
 
Why not pin and epoxy/solder the bolster on? Use 416 stainless for the bolster and pins?
 
I've heard you can forge AEB-L...
Why not just start with round bar as thick as you want the bolster, forge out the blade then grind in the bolster shape. Just like you would with carbon Steels...
Of course that would involve finding large AEB-L round bar...
 
FredyCro said:
When i did a course with R Kappeler in Salzburg I remember seeing stacks of machined or stamped large plates that had raised/taller sections for an integral bolsters on each side and top and bottom of the handle. He mostly uses n690 so I guess these were custom made by Boehler for him. Maybe if you ask Boehler or him you could get a piece somehow. Check his website and yoh will see what I mean.

For home use I think a deep weld with stick welder and stainless rods and then normalize/harden/temper in oven. Maybe try on scrap to see if it would still be brittle or prone to rust after tempering?
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I ordered 3,6mm thick , 60mm wide and 350 mm long M390 steel for two knife like this one .Plan was to use cut off part from that steel to make bolsters .It would be one shoot trying to weld bolster there.............. If i have time today i will buy several cheap kitchen knives from stainless .I have some ideas to try .I hope that stainless is stainless ,cheap one or M390 they should weld same ?
 
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