Jclonts82

notching cutting edge insert

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I have seen some examples of forge welding the cutting edge (HC) into lower carbon, WI, or pattern welded body. Many times I have seen (the cursed youtube) the inserted edge notched every 1/2 - 1" or so with a chisel before being inserted for the weld. Why is this? Are we introducing more surface area to weld? allowing flex room for the insert to bend better to match the body? 

I'm wanting to eventually give making some axes a go, and am researching beforehand. 

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I don't know specifically what you referring to; but traditionally you nick an insert to lock it in place so it doesn't have as great a tendency to "squirt out" when you go to weld it.  But as I said not knowing which videos you are referring to I can tell if that is the case for your question.

Can you tell me if the origami lightening bolts are a necessary part of sword forging like I saw on a video on youtube?

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Quick search for examples yielded this.  The  typed description on this video mirrors what TP described above. "Teeth are cut into a high carbon bit which will anchor it into the soft iron axe body for forge welding."

 

ironically searching for this example is the first time I found an explanation/reason for the notches. Unfortunately the majority of my 'research time' is limited to while at work, and the comp has no sound so I can't follow commentary, I can only watch or read.

 

I'm simply curious if there are other reasons for doing it. 

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