Christopher Price Posted October 16, 2014 Share Posted October 16, 2014 So first, a little set-up for context: I'm working a bar of damascus, composed of W2 and Iron meteorite (campo de ciello) which is iron with ~6% nickel and a sprinkling of other stuff. The billet is about 2:1 tool steel to iron, with a desired distribution of about 60 points of carbon. After forging and welding up to a 32-layer stack, a sample was cut, further forged into a blade, and quenched in warm oil (5 minute soak at 1450). The iron in this sample had been at near-welding temperatures for almost 2 hours alongside the W2, yet remained soft after the quench. So here's my curiosity. I've heard that Nickel is a barrier to carbon migration, but I've also heard that it neeeds to be nearly pure nickel to accomplish effective prevention of C migration in a bar of pattern-welded material, and that 6% was nowhere near enough to stop it. The empirical evidence suggests that it's not taking up the carbon effectively, though, and the layers post-forging are not what I'd call large in cross section. The rest of the billet I intend to do two triple-folds to get it close to 300 layers, and the knife pre-form will be about a quarter inch thick. I'm curious to know whether this increased folding, and thinning of the iron will get it to a point where it won't really matter, or if my C distribution is indeed being significantly affected by the nickel in the meteoric iron at 6%. I can say that just a few seconds under ferric, you get a brilliant contrast between the dark tool steel, and the bright iron in the test piece. The Tidewater Forge Christopher Price, Bladesmith Link to comment Share on other sites More sharing options...
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