Pivot mandrel of adjustment member

Abstract

The invention relates to a timepiece component for a timepiece movement, and in particular to a pivot mandrel of an adjustment member of a mechanical timepiece movement. The pivot mandrel is made of an alloy comprising the following components by weight: 25% to 55% of palladium; 25% to 55% of silver; 10% to 30% of copper; 0.5% to 5% of zinc; two elements of gold and platinum with a total content of 15% to 25%; 0% to 1% of one or two elements selected from the group consisting of boron and nickel; 0% to 3% of one or two elements selected from rhenium and ruthenium; no more than 0.1% of one or more elements selected from iridium, osmium and rhodium; and no more than 0.2% of other impurities, the sum of the amounts of the components being set to no more than 100%. The invention also relates to a method for producing a timepiece component for a timepiece movement.

Description

technical field

[0001] The present invention relates to a component for a watch movement, in particular to a non-magnetic watch component for a mechanical watch movement, in particular to a non-magnetic balance shaft, pallet shaft and escapement pinion. Background technique

[0002] The manufacture of a timepiece component comprising at least one part in the form of a turned part (e.g. a timepiece pivot arbor) involves performing a chip machining operation (e.g. profile turning) on ​​a hardenable stainless steel bar to define the respective effective surface (bearing surface, shoulder parts, pivots, etc.), the profile-turned mandrel is then subjected to a heat treatment comprising at least one hardening operation to increase the hardness of the member and one or more operations to increase the toughness of the member a tempering operation. In the case of pivoted mandrels, the heat treatment operation may be followed by a rolling / rolling operation on the pivot of the mandrel...

Images