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If your inserts with coating last shorter then uncoated, you have the wrong coating/ brand.we were beating our heads trying to figure out how to get good tool life until we figured out that you don't get good tool life with inconel
6300 sfm, that might have been me, it was A286(annealed), also trade named as incoloy. Ceramics are cool, but to use them effectively you have to understand how they work. They don't "cut" they sort of push. Hold a ceramic insert in your hand and if feels like a piece of plastic, kind of like a lego.P.I. that's what I was thinking.I read an article just recently where they were milling it at 6300 sfm. Yes 6300 sfm if it was inconel. So I was thinking of trying the ceramic but never turned it so was wanting opinions thanks!
I will disagree with this statement, from personal experience. On the A286 in the above post, we ran a large enough lot to get a lot of data on our tools. I kept track of it, afterall, tools are money. The TiAlN coated carbide tools actually had 30% less tool life consistantly. I had two different people tell me the same thing, the process that puts on the coating dulls the edges slightly, and as PI said, high nickel alloys like to be sheared and respond incredibly well to aluminum type tooling, very positive, very sharp and high shear.If your inserts with coating last shorter then uncoated, you have the wrong coating/ brand.
Coating will increase cutting speed.
With Inconel melting at about 2,500 deg F, not on any of my machines.need the heat from the uncoated insert so the material will melt and flow
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