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US 11,079,722 B2Granted
Component for a timepiece movement
AssigneeNivarox-FAR S.A.
InventorChristian Charbon
Life of this patent
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Abstract
A micromechanical component for a timepiece movement including a metal body formed using a single material. The single material is of high-interstitial austenitic steel type including at least one non-metal as the interstitial atom in a proportion between 0.15% and 1.2% with respect to total mass of the material.
Claims14
A micromechanical component for a timepiece movement comprising:
- a metal body formed using a single material that is an interstitial austenitic steel material including at least nitrogen and carbon as interstitial atoms homogeneously distributed throughout the interstitial austenitic steel material,
- wherein the interstitial austenitic steel consists of C, N, Cr, Mn, Mo, Si, Cu, and Fe,
- wherein the sum of the mass percent composition of carbon and of nitrogen in the metal body is between 0.61% and 0.80%, and the ratio of the mass percent composition of carbon and of nitrogen in the metal body is between 0.29 and 0.55,
- wherein the mass percentage of carbon in the metal body is between 0.16% and 0.25% and the mass percentage of nitrogen in the metal body is between 0.45% and 0.55%,
- wherein the interstitial austenitic steel includes between 2.70% and 3.70% by mass of molybdenum, and
- wherein the interstitial austenitic steel material includes a hardness comprised between 500 MV and 900 MV without the interstitial austenitic steel material being hardened with any material hardening treatment.
3 more elements
Dependencies are inferred from the claim text.