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护环是电机上的一个重要零件,用来固定电机转子上的导线。护环应该用无磁性的金属材料制成。材料的导磁系数μ不得大于1.1。过去对于一些小型电机曾采用有色金属(如黄铜等)来制造扩环,但因有色金属的强度极低,近年来随着电机容量的增大与转速的增高,已不能满足要求。因此,目前在大容量电机的生产中均采用没有磁性的奥氏体钢来制造护环。在工业上常采用加入Ni或Mn的办法来获得奥氏体钢因Ni与Mn均能使γ区扩大。在加入Ni或Mn以
The grommet is an important part of the motor that holds the wire on the rotor of the motor. Retaining ring should be made of non-magnetic metal material. The permeability of the material μ can not be greater than 1.1. In the past, some small motors used non-ferrous metals (such as brass, etc.) to manufacture expansion rings. However, due to the extremely low strength of non-ferrous metals, the capacity and speed of the motor have been increased in recent years and can no longer meet the requirements. Therefore, at present, non-magnetic austenitic steels are used for the production of grommets in the production of large-capacity motors. In the industry often used to join Ni or Mn way to get austenitic steel due to Ni and Mn can make γ area expanded. Add Ni or Mn