A paramagnetic stainless steel with a chemical composition including by weight: 26≤Cr≤40%, 5≤Ni≤20%, 0≤Mn≤5%, 0≤Al≤5%, 0≤Mo≤3%, 0≤Cu≤2%, 0≤Si≤5%, 0≤Ti≤1%, 0≤Nb≤1%, 0≤C≤0.1%, 0≤N≤0.1%, 0≤S≤0.5%, 0≤P≤0.1%, the remainder consisting of iron and any impurities each having a content less than or equal to 0.5%, the steel having a hardness HV10 between 500 and 900. It also relates to a part particularly a horological component made of this steel and to the process for manufacturing the part.

A method for decorating a surface of a mechanical part including: taking the mechanical part to be decorated, on which a decoration element is sought to be produced; depositing on the surface a masking layer having a thickness that is at least equal to the thickness of the decoration element to be produced; making, in the masking layer, at least one cavity that coincides with the location on the surface to be decorated, the cavity having a contour that corresponds to the contour of the decoration element and defining a volume; depositing a bonding layer made of an electrically-conductive material on top of the masking layer and on the surface, in the locations of the cavity, to facilitate the bonding of the decoration element; filling the volume delimited by the masking layer and the surface with a filling material in which the decoration element; and removing the masking layer.

A method for manufacturing a watch component is a method for manufacturing a watch component formed of austenitized ferritic stainless steel including a base formed of a ferrite phase and a surfacing layer formed of an austenitized phase in which the ferrite phase is austenitized, the method including a first processing step for forming a hole portion or a recessed portion at a base material formed of ferrite stainless steel, a heat treatment step for performing a nitrogen absorption treatment on the base material to form the surfacing layer at a surface side of the base, and a second processing step for cutting a surfacing layer corresponding to the hole portion or the recessed portion to form the watch component.

A powder metallurgy moulding composition intended for manufacturing decorative or covering articles in sintered massive cermet, including an inorganic powder to form the cermet and an organic binder. The inorganic powder includes by weight of 35% to 95% of at least one ceramic phase based on ceramic selected from the group consisting of TiC, TiCN, TiN and mixtures thereof, and from 5% to 65% of a metallic phase, the metallic phase consisting by weight of at least 40% of iron, from 15% to 45% of chromium, from 0.1% to 25% of molybdenum, from 0.1% to 10% of silicon, from 0 to 10% of boron, and from 0 to 10% of niobium, the respective amounts of the elements of the metallic phase being such that their sum is equal to 100 wt % of the metallic phase.

The present invention relates to a timepiece component (100) made up of a polymer-based matrix (110) and a reinforcement (120) that consists of at least two different kinds of cut fibres (121, 122), one of which is a polyazole.

The invention concerns a timepiece component containing a high-entropy alloy, the high-entropy alloy containing between 4 and 13 main alloying elements forming a single solid solution, the high-entropy alloy having a concentration of each main alloying element comprised between 1 and 55 at. %.

An assembly including horological movement support, a motor plate of a timepiece and a fastener fastening the support to the plate. The fastener includes a self-tapping screw having a body that passes through a hole in the support. A recess in the plate or support is tapped when the screw is screwed into the recess. The shape of the recess has a variable width, which is wider at the opening extending to a smaller diameter at the bottom of the recess, the shape corresponding to that of the body of the screw.

A method for decorating a train wheel bridge including a jewel includes: a cutting step for forming a plurality of groove portions at a first surface of the train wheel bridge; a smoothing step for smoothening a top portion formed between the groove portions adjacent to each other; a roughening step for roughening a decorative portion including the groove portions and a smooth portion as a result of the smoothing step; and a drilling step for forming a jewel receiving hole extending from the first surface to a second surface on an opposite side to the first surface.

A process for decorating a timepiece component, which includes performing (i) engraving (E10) of a surface to be decorated of the timepiece component with a femtosecond laser; and (ii) structuring (E20) of said surface to be decorated of the timepiece component, these two decorations being at least partially superposed on each other.

An assembly of timepiece parts assembled together with an adhesive at a temperature T.sub.A and to be repositioned when the adhesive is at a temperature T.sub.C. The adhesive includes a formulation, which at T.sub.C includes a mixture of polymer chains with pendant diene units X and coupling molecules including two dienophile end groups Y, wherein the X units and the Y groups are arranged to react with one another and to bond together with the Diels-Alder reaction at a temperature T.sub.DA and to regenerate with the retro-Diels-Alder reaction at a temperature T.sub.RDA, at T.sub.A forms a three-dimensional network, in which the polymer chains are linked to one another by the coupling molecules with the Diels-Alder reaction, where T.sub.A<T.sub.RDAT.sub.C, where temperature T.sub.DA ranges between 0 C. and 100 C. and temperature T.sub.RDA ranges between 50 C. and 200 C., and T.sub.DA is strictly lower than T.sub.RDA. A process for assembling and repositioning two timepiece parts with a repositionable hot melt adhesive to enable the timepiece parts to be repositioned when the adhesive is heated.