1. WP7V When tough isn`t tough enough

2. Properties of cold work steels42 66 46 50 54 58 62
carbide
rich
tough
hard
wear resistance
toughness
toughness
wear resistance
hardness in HRc

3. Cold work steels for forming processes

4. Structure comparison 1.2080 1.2379 CPOH CP4M WP7V
12,0% Cr
1.2379
1,6% C
12,0% Cr
CPOH
1,0% C
8,0% Cr
CP4M
0,6% C
5,0% Cr
WP7V
0,5% C
7,8% Cr

5. WP7V Case Studies Application: Shearing Tool, AISI S5
for CK 45, 42CrMo4
DIA 20 – 40 mm
Before:
Problem: Total Failure
Hardness: HRc
After:
Problem: None
Hardness: 58 HRc

6. WP7V Case Studies Application: Stamping tool K190 PM Plate ST 37-2,
10 mm thick
Before:
Problem: Failure after
2000 – 3000 shots
Hardness: 58 HRc
After:
Problem: None – regrind after
– shots
Hardness: 58 HRc

7. WP7V Case Studies Application: Punching Tool, WNR. 1.2379
for AP 0,14 (St 14)
DIA 20 – 40 mm
Before:
Problem: Total Failure
Hardness: HRc
After:
Problem: None
Hardness: 58 HRc

8. WP7V Case Studies Application: Punching break pads,
CPM® 3V, Carbon steels
ca. 400 N/mm2 , 5 mm thick
Before:
Problem: High cost of powder
steels.
Hardness: HRc
After:
Problem: None – upto
shots.
Hardness: HRc
TRW Group reference grades with max shots

9. 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 Stk.
50-52 HRC