1. Additive Manufacturing of Maraging 250 Steels for the Rejuvenation and Repurposing of Die Casting Tooling
- Author
-
Kottman, Michael Andrew
- Subjects
- Metallurgy, Engineering, Materials Science, Additive Manufacturing, Maraging, Die Casting, Repair, Laser Hot Wire, LHW, Direct Metal Deposition, DMD, Gas Metal Arc Welding, GMAW, Rapid Pulsed Arc, RPA, Laser Engineered Net Shaping, LENS, Electron Beam Freeform Fabrication, EBF3
- Abstract
In this study, a number of established additive manufacturing processes were evaluated for their suitability repairing high-pressure die cast tooling. The processes included in this study are laser hot wire (LHW), electron beam freeform fabrication (EBF3), gas metal arc welding (GMAW), Laser Engineered Net Shaping (LENS®), and direct metal deposition (DMD). To determine each process’ suitability, blocks of maraging 250 steel were deposited on H-13 base metal. The results show that the maraging deposits are capable of providing good strength (>160 ksi), toughness (>15 ft-lbs), and hardness (45 HRC) for die tooling applications, but care must be taken to limit the occurrence of defects, particularly porosity. Of the processes tested, the LHW, DMD, and LENS® processes had the best balance of deposit properties. However, additional work will be required to optimize the processing parameters for each process.
- Published
- 2015