Question about Kershaw Composite steel blades

[ColonialKnifeFan]

When Kershaw joins two steel together, how are they doing it? How strong is the bond between the two? I know the copper is just an accent and not the actual link that holds the two together. I am curious because I want to know if a composite steel blade can be used hard and will the blade hold up to that use? Is there things with the composite you would recommend someone should not do? Just want to know the limits of this technology.

 

[neuron]

When Kershaw joins two steel together, how are they doing it? How strong is the bond between the two? I know the copper is just an accent and not the actual link that holds the two together. I am curious because I want to know if a composite steel blade can be used hard and will the blade hold up to that use? Is there things with the composite you would recommend someone should not do? Just want to know the limits of this technology.

The copper isn't just decorative; it actually is what holds the metals together. The method is called brazing, and the joint it produces is extremely strong. You can use one of Kershaw's composite blades exactly as you would one made out of a single piece of metal.

 

[Scott Neelan]

Here's a YouTube video that explains it decently well:

http://www.youtube.com/watch?v=BsoRs5Pm20I

 

[bld522]

Nice video. Thanks. :thumbup:

 

[Beltfed45]

Wow great video! Now I think i might have to get a Junkyard Dog!

 

[Dorito Monk]

Nice vid! I was wondering just exactly how they did that...:thumbup:

 

[Thomas W]

Here's another link

http://www.bladeforums.com/forums/showthread.php?t=481111&highlight=composite

 

[knarfeng]

1 When Kershaw joins two steel together, how are they doing it?
2 How strong is the bond between the two? I know the copper is just an accent and not the actual link that holds the two together. I am curious because
3 I want to know if a composite steel blade can be used hard and will the blade hold up to that use?
4 Is there things with the composite you would recommend someone should not do?
5 Just want to know the limits of this technology.

1 by braising. The copper colored metal is the brazing alloy.
2 A brazed joint is often stronger than the parent metals.
3 yes it can be used hard and the joint will hold up to the usage. The limits are those of the two alloys being joined, not the joint itself.
4 no.
5 limits:
It's expensive. The tolerances have to be held very tight in cutting the two pieces to be joined.
The maximum use temperature is that of the joint metal. For a knife that is not going to enter in as a factor.

 

[THG]

From what I've heard, the joint is stronger than either of the two individual pieces. If there's going to be a crack, it's actually less likely to crack at the joint.