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US 11,920,220 B2Granted
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.
Claims14
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:
- greater than 3.5 and equal to or less than 5 weight %,
- Tungsten:
- equal to or greater than 18 and equal to or less than 30 weight %,
- Chromium:
- equal to or greater than 15 and equal to or less than 24 weight %
- Cobalt:
- at least 40 weight %;
- and
- wherein the sum of the chromium and tungsten is 36 to 48 wt %;
- 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.
10 more elements
Dependencies are inferred from the claim text.