John Donlan
Aerospace
That's my fellow manufacturing engineers know, when you haven't solved a problem... Even after many years... It's still begs for a solution in your mind. I would gladly appreciate your help and advice with this problem.
It's been many years (1983 - 1984) since I've written programs to turn hastelloy B and hastelloy C parts on the CNC lathes. Of all the aerospace and super alloy materials that we manufactured... These two were the most difficult.
Hastelloy C, and to a greater degree hatelloy B, had to be turned had a very slow speed (90 SFPM), and at a very generous depth of cut (.050 - .100"), and flooded with a constant stream of coolant.... And even then the carbide inserts would wear out prematurely. Hastelloy work hardens very easily... And it generally runs very hot. The chips come off almost flaming.
We tried experimenting with "Cerratip" ceramic inserts, but they would disintegrate almost immediately due to the extreme cutting pressure.
Would anyone like to share their current methods for machining these two materials, including workable speeds, feeds, depths of cut, and brand and grade of cutting tool inserts?
It's been many years (1983 - 1984) since I've written programs to turn hastelloy B and hastelloy C parts on the CNC lathes. Of all the aerospace and super alloy materials that we manufactured... These two were the most difficult.
Hastelloy C, and to a greater degree hatelloy B, had to be turned had a very slow speed (90 SFPM), and at a very generous depth of cut (.050 - .100"), and flooded with a constant stream of coolant.... And even then the carbide inserts would wear out prematurely. Hastelloy work hardens very easily... And it generally runs very hot. The chips come off almost flaming.
We tried experimenting with "Cerratip" ceramic inserts, but they would disintegrate almost immediately due to the extreme cutting pressure.
Would anyone like to share their current methods for machining these two materials, including workable speeds, feeds, depths of cut, and brand and grade of cutting tool inserts?