FIELD: watchmaking industry.
SUBSTANCE: present invention relates to a method for manufacturing a balance spring intended for installation on the balance of a clockwork, and a balance spring obtained by this manufacturing method. Essence: the balance spring, designed for installation on the balance of the clockwork, contains a core made of Nb-Ti alloy containing: niobium: residue up to 100, wt. % ; titanium: from 5 to 95 wt. %; traces of one or more elements selected from a group consisting of O, H, C, Fe, Ta, N, Ni, Si, Cu, Al, and each of these elements is present in an amount from 0 to 1600 million-1 by weight, while the total number of these elements is from 0 to 0.3, wt. %; moreover, the core made of Nb-Ti is covered with a layer of niobium with a thickness of 20 nm to 10 mcm.
EFFECT: facilitating the drawing and rolling of the wire for the balance spring, facilitating the separation of the balance springs after the fixation operation following the winding operation.
25 cl
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