Method for manufacturing balance wheel of timepiece

The invention relates to a process for manufacturing a metal alloy balance wheel by molding, the process including the following steps: a) making a mold in the negative shape of the balance wheel, b) getting hold of a metal alloy that has a thermal expansion coefficient of less than 25 ppm/DEG C and is able to be in an at least partly amorphous state when it is heated to a temperature between its glass transition temperatureand its crystallization temperature, c) putting the metal alloy into the mold, the metal alloy being heated to a temperature between its glass transition temperature and its crystallization temperature so as to be hot-molded and to form a balance wheel, d) cooling the metal alloy to obtain a balance wheel made of the metal alloy, e) releasing the balance wheel obtained in step d) from its mold. The process is characterized in that the process comprises a step for overmolding flexible centering members (16, 17) in the hub (4). 本发明涉及一种通过模制制造金属合金摆轮的方法，所述方法包括以下步骤：a)制造为所述摆轮(1)的负形状的模具；b)获得热膨胀系数小