Sandvik Coromant Heat resistant super alloys - Manual (Page 79)

77
+
–
50
45
40
35
30
25
20
15
10
5
0
GC1030 GC1030 GC1030 S30T GC2040 S40T GC2040
08E-PL 08M-PL 08M-PM 08M-PL 08M-MM 08M-PL 08E-ML
90 degree entering angle is the least favourable design for milling in HRSA due to the high
notching tendencies. However shoulder milling and profiling operations are demanded by the
component features e.g. mounting brackets, casings, rings (scallops), circular interpolation
of larger holes, slotting etc.
Grade, geometry and cutting data should be selected based upon the percentage radial
immersion.
Application – edging with low radial immersion
Tool R390-025A25-11H
z
n
4, D
c
25 mm, v
c
35 m/min, a
e
3.1 mm (12.5% of D
c
),
a
p
5 mm, h
ex
0.07 mm, f
z
0.11 mm/tooth
Material: Inconel 718 (40 HRC)
Minutes in cut
= Average time in cut
= Average volume removed
Total metal removed, cm 3
Recommendation – with a low immersion ratio (12.5%) grade and geometry
recommendation is S30T M-PL.
Grade GC2040 E-ML Grade S30T E-PL
CoroMill®390 – end milling/90 degree approach
Edging/finishing – low radial immersion
a
e
= 12.5% of D
c
.
200
160
120
80
40
0