Printable Die Steels for Additive Manufacturing
AssigneesMassachusetts Institute of Technology, Universität Paderborn
InventorsGregory B. Olson, Florian Hengsbach, Mirko Schaper
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Abstract
A novel family of die steels is disclosed. This family of die steels is strengthened through the formation of M2C precipitates and one or two additional precipitates, wherein M is one or more of chromium (Cr), vanadium (V), molybdenum (Mo) or tungsten (W). These additional precipitates may include copper precipitates, NiAl precipitates, and Ni(Al1-xMnx) precipitates. This creates a steel having an acceptable hardness, as well as excellent thermal conductivity.
Claims22
A method of producing a steel, comprising:
- forming a powder mixture comprising iron (Fe), carbon (C), nickel (Ni), aluminum (Al), and M, wherein M is one or more of chromium (Cr), vanadium (V), molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr), or niobium (Nb);
- using laser powder bed fusion to heat the powder mixture to form the steel, wherein the steel comprises at least two precipitates,
- a first precipitate comprising M2C;
- and
- a second precipitate comprising a nickel-aluminum (Ni—Al) rich precipitate.
A steel, made using laser powder bed fusion, comprising:
- iron;
- and
- two precipitates,
- wherein a first precipitate comprises M2C, wherein M is one or more of chromium (Cr), vanadium (V), molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr), or niobium (Nb);
- and
- a second precipitate comprises a nickel-aluminum (Ni—Al) rich precipitate.
A powder mixture, suitable for laser powder bed fusion, comprising:
- iron (Fe);
- carbon (C);
- nickel (Ni);
- aluminum (Al);
- and
- M, wherein M is one or more of chromium (Cr), vanadium (V), molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr), or niobium (Nb);
- wherein a carbon weight percentage of the powder mixture is between 0.04% and 0.2% and a nickel weight percentage of the powder mixture is less than 20%.
Dependencies are inferred from the claim text.