If you are going to forge weld it to itself, heat it, twist it open a little, flux, and repeat several times to get it cleaned out down inside, first. I didn't with my first cable knife weld. It didn't totally weld because of some dirt and oil that didn't get cleaned out. Now I heat, twist and flux a couple or three times, first. Now the blade comes out more solid. Also, be careful. IT WILL splatter flux, when hit with the hammer!!. Good luck.
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