苏联4A系列电动机的导磁材料,采用0300号电工用普通碳素钢片。这种钢片在钢铁厂未经退火处理。钢片在中性介质中进行热处后,其导磁性能应保证达到:B_(25)≥1.65万高斯;B_(300)≥2.05万高斯;P_(10)/50≤2.7瓦/公斤;P_(15)/50≤6.2瓦/公斤。电机制造厂把钢片冲制成定、转子片后送去热处理,以达到规定的导磁性能,并在其表面形成氧化膜绝缘层。退火必须在中性介质中进行,以防氧化和渗碳。经试验结果证明:0300号钢片的 The Soviet Union 4A series of motor magnetic material, the use of 0300 electrician ordinary carbon steel. The steel is not annealed at the steelworks. After the steel sheet is heat-treated in a neutral medium, its magnetic conductivity should be guaranteed to reach: B 25 (25) ≥ 16,500 Gauss, B 300 (300) ≥ 20,000 Gauss, P 10/50 ≤ 2.7 W per kg, P_ (15) /50≤6.2 W / kg. The electrical machinery factory punches the sheet to make the sheet, the rotor piece sends to the heat treatment, achieves the stipulation magnetic permeability performance, and forms the oxide film insulating layer on its surface. Annealing must be carried out in a neutral medium to prevent oxidation and carburization. The test results show that: 0300 steel