Bert2368
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I had previously seen a number of knives by a (now deceased) Japanese smith which used a layer of Copper between core and outer layers of steel, will try and run down the pics.
(Edit)
Here is where I found the Japanese knives (Jin from Japanese Knife Imports), and a sample picture showing the Copper layer-
https://www.japaneseknifeimports.com/search?type=product&q=Jin
And I have just run across a Kershaw Leek variant which looks like it has the same lamination between core and outer steel!
The Japanese smith was said to favor "tool steel" for the cutting edge. The Kershaw knife claims to use "D2", which is a tool steel, albeit used more for punches and dies than cutting tools in industrial settings.
https://www.amazon.com/dp/B0017KN4MS/?tag=skimlinks_replacement-20
See this screen grab:
Could any experienced smiths speak as to the utility and/or desirability of this Copper/Copper alloy bonding method?
Is the technique essentially what I was taught to call "brazing" back in an engineering materials & machining techniques course about 40 years ago, rather than the (more common) "forge welding" I assume is used for most steel blade lamination?
(Edit)
Here is where I found the Japanese knives (Jin from Japanese Knife Imports), and a sample picture showing the Copper layer-
https://www.japaneseknifeimports.com/search?type=product&q=Jin
And I have just run across a Kershaw Leek variant which looks like it has the same lamination between core and outer steel!
The Japanese smith was said to favor "tool steel" for the cutting edge. The Kershaw knife claims to use "D2", which is a tool steel, albeit used more for punches and dies than cutting tools in industrial settings.
https://www.amazon.com/dp/B0017KN4MS/?tag=skimlinks_replacement-20
See this screen grab:
Could any experienced smiths speak as to the utility and/or desirability of this Copper/Copper alloy bonding method?
Is the technique essentially what I was taught to call "brazing" back in an engineering materials & machining techniques course about 40 years ago, rather than the (more common) "forge welding" I assume is used for most steel blade lamination?
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