Transcript WP7V Case Studies

WP7V
When tough isn`t tough enough
Properties of cold work steels
hard
carbide
rich
toughness
wear resistance
tough
toughness
wear resistance
42
46
50
54
58
hardness in HRc
62
66
Cold work steels for forming processes
material
standard chemical composition
Mo
V
W
Ni
0,45 0,45 0,30 1,40 0,20
-
-
4,00
C
Si
Mn
tempering behaviour
Cr
0,60 0,70 0,30 1,00
-
0,20 2,00
-
0,50 0,30 0,30 7,80 1,50 1,50
-
-
0,90 0,30 2,00 0,40
0,15
-
-
1,00 0,30 0,60 5,00 1,00 0,30
-
-
1,00 1,10 0,30 8,00 2,50 0,30
+ add.
-
1,20 0,30 0,30 12,0 1,40 1,70 2,50
-
1,55 0,25 0,30 12,0 0,80 1,00
-
-
0,80
-
2,10 0,25 0,30 12,0
-
-
1.2767
1.2550
WP7V
1.2842
1.2363
CPOH
CPR
1.2379
1.2436
WP7V Case Studies
Application: Shearing Tool, AISI S5
for CK 45, 42CrMo4
DIA 20 – 40 mm
Before:
Problem:
Hardness:
Total Failure
57 -58 HRc
After:
Problem:
Hardness:
None
58 HRc
WP7V Case Studies
Application:
Before:
Problem:
Hardness:
Failure after
2000 – 3000 shots
58 HRc
After:
Problem:
Hardness:
Stamping tool K190 PM
Plate ST 37-2,
10 mm thick
None – regrind after
80.000 – 100.000 shots
58 HRc
WP7V Case Studies
Application: Punching Tool, WNR. 1.2379
for AP 0,14 (St 14)
DIA 20 – 40 mm
Before:
Problem:
Hardness:
Total Failure
59 -61 HRc
After:
Problem:
Hardness:
None
58 HRc
WP7V Case Studies
Application: Punching break pads,
CPM® 3V, Carbon steels
ca. 400 N/mm2 , 5 mm thick
Before:
Problem:
Hardness:
High cost of powder
steels.
57 -58 HRc
After:
Problem:
Hardness:
None – upto 40.000
shots.
58-59 HRc
WP7V Case Studies
Application: Punching brass, working temp., approx. 500ºC
The problem: Total failure
W321 (1.2885)
Without Cooling
6-7 pieces.
WP7V
Without Cooling
Ca. 300 stk
WP7V
With Cooling (Oil/Air/Graphite)
ca. 75000 Stk.
50-52 HRC