论文部分内容阅读
机械手表的擒纵轮是手表整机中确保走时精度的关键部件之一,除机加工精度要求高外,要求金属材料易切削、耐磨损。目前国产手表的擒纵轮用炭钢与瑞典进口料相比,生产过程工序多,工艺复杂,精磨工序成品合格率较低。上海有色所研制成功的Cu-20Ni-20Mn合金,加工态硬度(HV)250～280公斤/毫米~2,时效态(HV)400～450公斤/毫米~2,与人造红宝石匹配,摩擦系数(μ)0.061
Mechanical watch escapement wheel watch is to ensure that the accuracy of the travel time, one of the key components, in addition to high precision machining requirements, the requirements of metal cutting and wear-resistant materials. At present, the domestic watch with escape wheel carbon steel and imported materials compared to Sweden, the production process and more complex process, finished product grinding process lower pass rate. Cu-20Ni-20Mn alloy developed by Shanghai Nonferrous Metals has a working hardness (HV) of 250 to 280 kg / mm 2 and an aging time (HV) of 400 to 450 kg / mm 2, matched with synthetic ruby and a coefficient of friction μ) 0.061