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当前生产的铝镍钴合金与磁铁都含有昂贵而稀缺的金属钴达24％,在保证磁性能前提下,以廉价的硅代替部分钴,具有现实经济意义。 我厂生产的某电机永久磁铁、其材料为AlNiCo5合金,磁性要求为:Br≥12000高斯,Hc≥550奥斯特,(BH)_(max)≥4.0×10~6高·奥。由于在合金中加入少于1％硅时可以抑制γ相的析出,延缓α→α_1+α_2相的分解反应,从而使磁场热处理时临界冷却速度下降,剩磁和磁能
At present, Alnico and magnet both contain expensive and scarce metallic cobalt up to 24%. It is of practical economic significance to replace part of cobalt with cheap silicon under the premise of ensuring magnetic properties. I plant a permanent magnet motor, the material is AlNiCo5 alloy, magnetic requirements: Br ≥ 12000 Gauss, Hc ≥ 550 Oersted, (BH) _ (max) ≥ 4.0 × 10 ~ 6 high · Austria. As the addition of less than 1% silicon alloy can inhibit the precipitation of γ phase, delay α → α_1 α2 phase decomposition reaction, so that the magnetic field heat treatment when the critical cooling rate decreased, the remanence and magnetic energy