Sandvik Coromant Heat resistant super alloys - Manual (Page 82)

80
125
100
75
50
25
0
Effect of cutting speed, v
c
Careful consideration must be made when selecting cutting speed for end milling in HRSA
materials. Reduce cutting speed if radial emersion is increased.
Tool R390-025A25-11H
z
n
4, D
c
25 mm, a
p
5 mm, Material: Inconel 718 (40 HRC)
v
c
25 m/min v
c
30 m/min v
c
35 m/min v
c
25 m/min v
c
30 m/min v
c
35 m/min
h
ex
0.07 mm, f
z
0.11 mm h
ex
0.11 mm, f
z
0.11 mm
a
e
3.1 mm (12.5% of D
c
) a
e
12.5 mm (50% of D
c
)
S30T E-ML S30T E-ML
= Average time in cut
= Average volume removed
Recommendation
Highest tool life and total metal removed were achieved using S30T E-ML at 25 m/min.
Most productive insert at increased cutting speed S30T E-ML at 35 m/min, 50% immer-
sion ratio and 0.1 mm feed/tooth.
Minutes in cut
Total metal
removed, cm 3
250
200
150
100
50
0