随着国防工业的发展,对铝合金材料提出了新的和更高的要求,航空工业用的测速机转子杯材料就是其中一例。作为测速机转子杯材料,要求电阻率低、电阻温度系数小、比重小、内部组织均匀、加工性能好。国外测速机转子杯材料是采用铝合金,而国内过去采用铜合金,由于其比重比铝 With the development of national defense industry, new and higher requirements for aluminum alloy materials have been put forward. The rotor cup material for the aviation industry is one of the examples. As the speedometer rotor cup material, low resistivity, small temperature coefficient of resistance, small proportion, uniform internal organization, processing performance. Foreign tachometer rotor cup material is the use of aluminum alloy, while the domestic past the use of copper alloy, due to its proportion of aluminum