Sandvik Coromant Heat resistant super alloys - Manual (Page 81)

79
50
40
30
20
10
0
Effect of chip thickness, h
ex
Tool R390-025A25-11H
z
n
4, D
c
25 mm, v
c
25 m/min, a
p
5 mm,
Material: Inconel 718 (44 HRC)
Recommendation
For low radial immmersion, grade/geometry S30T E-ML chip thickness 0.07 mm.
For increased radial immersion, grade/geometry S30T E-ML chip thickness 0.07 mm.
Minutes in cut
h
ex
0.07 mm h
ex
0.13 mm h
ex
0.07 mm h
ex
0.1 mm h
ex
0.13 mm
f
z
0.11 mm/tooth f
z
0.20 mm/tooth f
z
0.07 mm/tooth f
z
0.1 mm/tooth f
z
0.13 mm/tooth
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
Total metal removed, cm 3
200
160
120
80
40
0