Abstract: Micromechanical component, particularly a timepiece wheel, particularly an escapement wheel, including a substrate with a first material including at least nickel and phosphorus, which substrate is covered, on at least one surface of the substrate of the wheel, by a coating of a second material including at least nickel and poorer in phosphorus than the first material, or devoid of phosphorus, and the second material constitutes the peripheral layer of the wheel at this at least one surface of the substrate.

Abstract: A method for manufacturing a timepiece wheel, according to which a substrate is produced with a first material including at least nickel and phosphorus, the substrate is shaped to the geometry of the wheel, and a coating of the substrate is performed, galvanically and/or chemically, on at least one surface of the substrate of the wheel, with at least one second material, which constitutes the peripheral layer of the wheel at the at least one surface of the substrate of the wheel, and which includes at least nickel and which is poorer in phosphorus than the first material, or which includes nickel and is devoid of phosphorus.

Abstract: A method for manufacturing a horological mobile (10) including: depositing a first thin layer (11) with a first material including at least nickel, the periphery of which defines the contour of the geometry of the horological mobile (10); depositing an intermediate layer (12), with a second material including at least nickel and phosphorus, so as to cover a face of the first thin layer (11), the periphery of which corresponds to that of the geometric shape of the first thin layer (11); depositing a second thin layer (13) with the first material, so as to cover a face of the intermediate layer (12), the periphery of which corresponds to that of the geometric shape of the first thin layer (11), wherein the first and the second thin layer (11, 13) are poorer in phosphorus than the intermediate layer (12), or do not contain any phosphorus.

Abstract: A method for producing a timepiece barrel including a drum with a first spring bearing surface of a chamber including a spring, including a bore for guiding a core and bordered by an inner abutment surface and by an outer abutment surface, the spring bearing surface on the side of the chamber including a DLC coating and the bore is thus masked to avoid any DLC coating, and, either at least the inner abutment surface or the outer abutment surface is devoid of any DLC coating, or all of the surfaces of the drum include a DLC coating, with the exception of the first bore, which is devoid of any DLC coating, after a DLC treatment is effected over the entire drum with the exception of the masked areas.

Abstract: Barrel for a self-winding timepiece including a drum of axis AA provided with an internal lateral wall having friction surfaces alternating with locking structures forming salient or inward edges at the boundary of the friction surfaces and a mainspring forming a winding including an outer coil, which is friction coupled to said internal lateral wall and free to slip against said internal lateral wall in the event of overwinding of the mainspring, characterized in that said friction surfaces are demarcated, downstream relative to the direction in which said outer coil slips, by a rounded salient edge or an inward edge.

Abstract: Barrel for a self-winding timepiece including a drum of axis AA provided with an internal lateral wall having friction surfaces alternating with locking structures forming salient or inward edges at the boundary of the friction surfaces and a mainspring forming a winding including an outer coil, which is friction coupled to said internal lateral wall and free to slip against said internal lateral wall in the event of overwinding of the mainspring, characterized in that said friction surfaces are demarcated, downstream relative to the direction in which said outer coil slips, by a rounded salient edge or an inward edge.