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US 2026/0086503 A1Published application
Non-magnetic pivot axis
AssigneeNivarox-FAR S.A.
InventorsLionel MICHELET, Christian CHARBON, Marco VERARDO
Life of this patent
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Abstract
A pivot axis for a horology movement, including at least a part made of pure tungsten or of a tungsten alloy with at least a portion of the part converted into a layer of tungsten carbide (5).
Claims10
A pivot axis for a horology movement, comprising at least a part made of pure tungsten or of a tungsten alloy with at least a portion of said part converted into a layer of tungsten carbide (5).
A thermal treatment method for a pivot axis comprising the following steps:
- providing a pivot axis comprising at least a part made of pure tungsten or of a tungsten alloy,
- thermal treatment of at least a portion of said part in a carbon-rich gaseous atmosphere at a holding temperature comprised between 1,000° C. and 1,300° C. for a time comprised between 5 minutes and 2 hours.
Dependencies are inferred from the claim text.