Specifications
• General:
– Maximum Insert Size 7 x 7 x 4 in.
– Machine Cycle Time ~2 Hours
– Process Cycle Time 5 days
– Metals: All Tool Steels, Copper, Brass, Gray Iron, Invar
Kirksite, & Specialty Alloys (hard steels, TiAl, …)
– Process Steps: RP or other Master, Optional RTV Pattern,
Cast Ceramic Pattern, RSP Tool, Optional
Artificial Aging or HT, Further Finish (if needed)
• Dimensional (H13 data)
– Accuracy (ceramic pattern to tool) +/- 0.00025 in.
– Accuracy (master pattern to tool w/ freeze cast ceramic) +/- 0.0010 in. *
– Accuracy (CAD to tool w/ slip cast shrink prediction) +/- 0.0030 in.
– Repeatability (RTV pattern to multiple tools) +/- 0.0010 in. *
– Surface Finish 40 µin Ra
• Metallurgical (H13 data)
– Density 99.7%
– Grain Structure uniform, fine, very limited segregation
– Matrix Structure lower bainite (no change w/ aging)
– Internal Stresses very low since mostly solid upon deposition
– Hardness 56 HRC (as-deposited) to 62 HRC (age hardened)
– Ultimate Tensile Strength 154 ksi (as-deposited) to 285 ksi (age hardened)
– Yield Strength 138 ksi (as-deposited) to 273 ksi (age hardened)
– Toughness 8 to 15 when HT to 44 HRC-- 5 to 8 at 62 HRC
– Thermal Fatigue Resistance Increased at high temperatures