# US 11,079,722 B2 · Component for a timepiece movement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,722 B2 - Document ID: US11079722B2 - Status: Granted - Kind: B2 - Application number: 14/895,137 - Filed: 2014-05-09 - Published: 2016-05-05 - Granted: 2021-08-03 - Earliest claimed: 2013-06-12 - Assignees: Nivarox-FAR S.A. - Applicants: Nivarox-Far S.A. - Inventors: Christian Charbon - Web page: https://patentgrep.com/patent/US11079722B2 ## CPC - G04B 43/007: {Antimagnetic alloys (antimagnetic alloys with temperature compensation G04B17/227; apparatus for antimagnetising G04D9/00; alloys in general C22C)} - B21B 1/22: for rolling {plates, strips,} bands or sheets of indefinite length (B21B1/42 takes precedence) - B21K 23/00: Making other articles - B22D 25/026: {Casting jewelry articles (B22D13/063 takes precedence)} - B24B 1/00: Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes - C22C 38/001: {containing N} - C22C 38/02: containing silicon - C22C 38/20: with copper - C22C 38/22: with molybdenum or tungsten - C22C 38/38: with more than 1.5% by weight of manganese - C22C 38/40: with nickel - C22C 38/42: with copper - C22C 38/44: with molybdenum or tungsten - C22C 38/48: with niobium or tantalum - C22C 38/58: with more than 1.5% by weight of manganese - C22C 38/60: containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur - G04B 13/02: Wheels; Pinions; Spindles; Pivots (bearings G04B31/00 {; chain wheels, spindles for chain wheels, also chains and driving weights G04B1/08}) - G04B 15/14: Component parts or constructional details, e.g. construction of the lever or the escape wheel {(assembly and manufacture of the spring G04B1/145; assembly and manufacture of components, e.g. pinions, spindles G04B13/02; lubrication of clockwork bearings G04B31/008; oils for clockwork bearings in general G04B31/08)} - G04B 18/02: Regulator {or adjustment} devices; Indexing devices {, e.g. raquettes} - G04B: MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08) - B21B: ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04) - B21K: MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS (making particular articles by working sheet metal without essentially removing material B21D; processing wire B21F; making pins, needles or nails B21G; making particular articles by rolling B21H; forging machines, pressing machines, hammering machines, in general B21J; making chains B21L; plating B23K) - B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22) - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS - C22C: ALLOYS (treatment of alloys C21D, C22F) ## Abstract A micromechanical component for a timepiece movement including a metal body formed using a single material. The single material is of high-interstitial austenitic steel type including at least one non-metal as the interstitial atom in a proportion between 0.15% and 1.2% with respect to total mass of the material. ## Claims ### Claim 1 A micromechanical component for a timepiece movement comprising: a metal body formed using a single material that is an interstitial austenitic steel material including at least nitrogen and carbon as interstitial atoms homogeneously distributed throughout the interstitial austenitic steel material, wherein the interstitial austenitic steel consists of C, N, Cr, Mn, Mo, Si, Cu, and Fe, wherein the sum of the mass percent composition of carbon and of nitrogen in the metal body is between 0.61% and 0.80%, and the ratio of the mass percent composition of carbon and of nitrogen in the metal body is between 0.29 and 0.55, wherein the mass percentage of carbon in the metal body is between 0.16% and 0.25% and the mass percentage of nitrogen in the metal body is between 0.45% and 0.55%, wherein the interstitial austenitic steel includes between 2.70% and 3.70% by mass of molybdenum, and wherein the interstitial austenitic steel material includes a hardness comprised between 500 MV and 900 MV without the interstitial austenitic steel material being hardened with any material hardening treatment. ### Claim 2 (depends on 1) The micromechanical component according to claim 1, wherein the mass percentage of carbon in the metal body is between 0.17% and 0.25%. ### Claim 3 (depends on 1) The micromechanical component according to claim 1, wherein the sum of the mass percent composition of carbon and of nitrogen in the metal body is equal to 0.8% and the ratio of the mass percent composition of carbon and of nitrogen in the metal body is equal to 0.45. ### Claim 4 (depends on 1) The micromechanical component according to claim 1, wherein an amount of chromium in the interstitial austenitic steel is at least 10% by mass and an amount of manganese in the interstitial austenitic steel is at least 5% by mass. ### Claim 5 (depends on 4) The micromechanical component according to claim 4, wherein an amount of coper in the interstitial austenitic steel is between 0.5% and 5% by mass. ### Claim 6 (depends on 1) The micromechanical component according to claim 1, wherein the interstitial austenitic steel is insensitive to magnetic fields. ### Claim 7 (depends on 1) The micromechanical component according to claim 1, wherein the interstitial austenitic steel is insensitive to corrosion. ### Claim 8 (depends on 1) The micromechanical component according to claim 1, wherein an amount of silicon in the interstitial austenitic steel is 0.6% or less by mass. ### Claim 9 (depends on 1) The micromechanical component according to claim 1, wherein the micromechanical component is usable in the timepiece movement without any material hardening treatment to the interstitial austenitic steel, without any chemical protection of the interstitial austenitic steel, and without any magnetic shielding treatment to the interstitial austenitic steel. ### Claim 10 (depends on 1) The micromechanical component according to claim 1, wherein an amount of chromium in the interstitial austenitic steel is between 16.50% and 18.00% by mass. ### Claim 11 (depends on 1) The micromechanical component according to claim 1, wherein an amount of manganese in the interstitial austenitic steel is between 9.50% and 12.50% by mass. ### Claim 12 (depends on 1) A method for fabricating the micromechanical component according to claim 1, comprising: a) taking the interstitial austenitic steel material, in which at least nitrogen and carbon as interstitial atoms are homogeneously distributed throughout the interstitial austenitic steel material, the sum of the mass percent composition of carbon and of nitrogen in the metal body is between 0.61% and 0.80% and the ratio of the mass percent composition of carbon and of nitrogen in the metal body is between 0.29 and 0.55, and the interstitial austenitic steel material includes a hardness comprised between 500 HV and 900 HV without the interstitial austenitic steel material being hardened with any material hardening treatment; and b) forming, using only the material, the micromechanical component, wherein the mass percentage of carbon in the metal body is between 0.16% and 0.25% and the mass percentage of nitrogen in the metal body is between 0.45% and 0.55%. ### Claim 13 (depends on 12) The method according to claim 12, wherein the sum of the mass percent composition of carbon and of nitrogen in the metal body is substantially equal to 0.8% and the ratio of the mass percent composition of carbon and of nitrogen in the metal body is substantially equal to 0.45. ### Claim 14 (depends on 12) The method according to claim 12, wherein an amount of chromium in the interstitial austenitic steel is at least 10% by mass and an amount of manganese in the interstitial austenitic steel is at least 5% by mass.