Quote:
Originally Posted by Rusty
I worked with that metal all the time at Elliott. Gas turbines and steam turbines are full of it. Ever play around with Inconel 625? The machinists hated it with a passion. Said it was gummy the machine, and worn the bits quickly.
had to go super slow on the feed rates, and dump tons of coolant on the work piece.
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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.