This stuff work hardens like nothing I've seen. I use a conventional
coated endmill about 60 sfm. I like a chip load of about .005 per tooth.
Even keeping things moving, it's still a bitch.
Turning I use a carbide insert positive rake. I hone this insert till
it's extremely sharp. Watch your tool overhang, don't hesitate in the
cut. I've had best luck taking a pretty heavy cut. This works "fairly"
well. Keep things as ridgid as you can.
Check the recommended speeds and feeds at the bottom:
Liberals - Cosmopolitan critics, men who are the friends
of every country save their own. Benjamin Disraeli
In the last century, I was involved in cutting a lot of Inconel, and the
things that worked were carbide cutters, configured and used to the spec,
and Cool-Tool lubricant.
Disclaimer: This information, like the informant, may be out of date.
Very stiff setup. Slow speeds, very high feed rate and lots of cooling.
Soluble oil works better than cutting oil. Sharp tool with lots of relief. I
prefer HSS over carbide to reduce tool drag and heat. M42 or equivilent.
Lots of Cobalt. Good luck.
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