Transcript Die Materials Development Task Force NADCA Headquarters October 14, 2009 Areas of Interest  New die materials to increase die life – –  Ferrous materials Non-ferrous materials New die materials to.

Die Materials
Development
Task Force
NADCA Headquarters
October 14, 2009
Areas of Interest

New die materials to increase die life
–
–

Ferrous materials
Non-ferrous materials
New die materials to decrease cycle time –
(i.e. increase productivity)
–
High thermal conductivity materials
Goal

To obtain field information to validate
laboratory testing information

To assist in providing information for the
Specification Task Force
Tank Tread Heat Sink
Trials at St. Clair Die Casting

AM703
– 48- 50 HRC DieVar High Speed Machined
– Anvilloy Cores with reduce length to facilitate
heat transfer.
– Tool has additional cooling line in each of
ejector half inserts between cavities.
 0.25” NPT to improve heat removal.
– Front and ejector half of die moved 0.375”
NPT line from 7/8” to 0.625” below cavity.
Trials at St. Clair Die Casting
Currently has 68,000-70,000 shots.
 Cycle time reduce from 55 sec. to 50 sec.

– Can we further reduce with lower oil temp?
 Reducing to 230-240°F resulted in poor fill.
 Best temperature is about 250°F
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Inserts
– Slight heat checking in all.
– Localized breakout in one insert
Premier Tool & Die Cast Co
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VacDie 34 (Allvac Ni Base Alloy)
Tilt Steering Column 2 Cavity Die
Cooling Passage 0.120”
Initial Machining Difficulties Settled
VacDie 34 used for slide tips.
PG H13
– 25 K Shots to Crack Initiation
– 100 K Shots to Die Retirement
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Alloy HT in High Strength Condition
Premier Tool & Die Cast Co
Cooling lines at 0.5” instead of 0.75”
depth
 Cracking Noted at 6K Shots
 Allvac evaluation

– Material failed due to high temperatures
which caused surface reactions with molten Al
– Water should be used as coolant instead of
hot oil
– Allvac believes would not fail if kept cool.