The New “What did you do with your Z today” (with off topic replies) XXXVII

Originally Posted by madwi

yep, I machined that and all kinds of specialty alloys for the chairforce. The inconel was soft and super abrasive. It would gum up terribly on carbide. We bought a mill that could spin the cutters at 20K rpm and we used ceramic inserts. no coolant. It was like watching a volcano go off inside the machine. Molten inconel flung everywhere. It took cycle times down from 18 hours with solid carbide endmills to 3 hours each part. We had to replace the safety plexiglass after every batch as it there would be "chips" melting all the way through it.