Part for clock movement

Abstract

The invention relates to a watch component (1) comprising at least one part (3) machined by chip removal. Said part (3) is made of a non-magnetic copper alloy in order to limit its sensitivity to magnetic fields, said copper alloy comprising, by weight, between 10% and 20% of Ni, between 6% and 12% of Sn, X% d additional elements, where X is between 0 and 5, and the remainder of Cu. The inventionrelates to the field of watch movements.

Description

technical field [0001] The invention relates to a component for a timepiece movement, and in particular to a non-magnetic timepiece component for a mechanical timepiece movement, and in particular to a non-magnetic balance, fork and escapement pinion. Background technique [0002] The manufacture of a timepiece component comprising at least one part in the form of a turned component (e.g. a timepiece pivot arbor) involves performing a chip-removing machining operation (e.g. a bar turning operation) on a hardenable steel bar to define different working surfaces (bearing surfaces, shoulders, pivots, etc.) and then subjecting the machined timepiece components to a heat treatment operation comprising at least one hardening operation to increase the hardness of said components and to increase the toughness of the arbor one or more tempering operations. In the case of a pivoted mandrel, the heat treatment operation may be followed by an operation of rolling the pivot of the mandr...

AI Technical Summary

Problems solved by technology

However, these alloys may show difficulty in chip removal machining

Furthermore, these alloys are relatively expensive due to the high cost of nickel and cobalt

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