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降低Co含量,这是Fe-Cr—Co永磁合金日前研制的一个重要趋向。其意义不仅是节省金属Co,而且有力地推动了合金的发展。15％Co合金的(BH)max值达到6.5MGOe,而以前含23％Co的合金的(BH)max值只有5.0MGOe。添加适当的合金元素,有可能抑制有害的γ和σ相的形成,得到只有单一的α相的合金,这对改善工艺性能和磁性能都非常重要。为了进行这方面的研究工作,我们对不同Cr、Co含量的配比,添加不同元素的合金进行试验。我们曾在工作中先后报导了几种Co含量为12～15％的合金,(BH)max值达到6.5～7.30MGOe。岩田在工作中也曾报导含12％Co的合金,(BH)max值达到7.20M
Reduce the Co content, which is Fe-Cr-Co permanent magnet alloy developed an important trend recently. Its significance is not only to save the metal Co, but also effectively promote the development of the alloy. The (BH) max value of 15% Co alloy reached 6.5 MGOe, compared to 5.0 MGOe for the alloy containing 23% Co before. Adding suitable alloying elements makes it possible to suppress the formation of harmful gamma and sigma phases, resulting in an alloy with only a single alpha phase, which is important for improving process and magnetic properties. In order to carry out research work in this area, we tested the alloys with different Cr and Co contents and added different elements. In our work, we have reported several alloys with Co content of 12-15% with (BH) max reaching 6.5-7.30 MGOe. Iwata has also reported alloys containing 12% Co at work, with a (BH) max value of 7.20M