Method for fabrication of a timepiece balance spring |
|||||||
| 申请号 | US15292403 | 申请日 | 2016-10-13 | 公开(公告)号 | US10138529B2 | 公开(公告)日 | 2018-11-27 |
| 申请人 | Nivarox-FAR S.A.; | 发明人 | Christian Charbon; Guido Plankert; | ||||
| 摘要 | Method for fabrication of an antiferromagnetic and temperature compensated timepiece balance spring, including the steps of: selecting an amagnetic iron-chromium-nickel-manganese-beryllium compensating alloy, comprising, by mass percent, between and including: from 21.0% to 25.0% of manganese, from 9.0% to 13.0% of nickel, from 6.0% to 15.0% of chromium, from 0.2% to 2.0% of beryllium, the remainder iron, the total of nickel and manganese being higher than or equal to 33.0%, working the alloy to obtain a blank, shaping the blank by casting and/or forging and/or wire drawing and/or rolling and/or drawing, to obtain a blank of spring wire; winding the wire on a winder to obtain a balance spring, subjecting the spiral spring to at least a heat setting treatment, by annealing at a temperature comprised between 540° C. and 650° C., for a duration of 30 to 200 minutes, to obtain a balance spring. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈