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US 2023/0101301 A1Published application
High carbon content cobalt-based alloy
AssigneeVBN Components AB
InventorUlrik BESTE
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Abstract
The present invention relates to a 3D-printed cobalt-based alloy product comprising carbon, tungsten and chromium with very good mechanical and thermal properties as well as a method of preparing the 3D-printed product and a powder alloy. The alloy has a high carbon content leading to high carbide content but small and evenly distributed carbides. A method facilitating 3D printing of high carbide content alloys such as the present alloy is also disclosed.
Claims22
A 3D-printed product made of an alloy comprising a metal matrix and grains of carbides embedded in the metal matrix;
- wherein the alloy comprises
- Carbon:
- equal to or greater than 2.5 and equal to or less than 5 weight %,
- Tungsten:
- equal to or greater than 12 and equal to or less than 30 weight %,
- Chromium:
- equal to or greater than 12 and equal to or less than 27 weight %
- Cobalt:
- equal to or greater than 30 weight %;
- wherein the alloy has a melting point of less than 1750° C. but higher than 1300° C.;
- and
- wherein the hardness of the 3D-printed product is at least 800 HV.
9 more elements
Dependencies are inferred from the claim text.