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本文报导了近几年来在吕臬古5成份基础上发展起来的含钛(～5％)高钴(～34％)吕臬古永磁合金所作的若干研究。试验证实,通过恒温热磁处理,可以获得远较控速处理为优异的永磁性,肯定了Koch等的经验;发现矫顽力对恒温热磁处理温度极为敏感。对恒温热磁处理的样品的结构状态,进行了电子显微等的研究,表明由于事先的恒温处理条件不同,造成了α′相的不同分散度、不同形态和不同的永磁性。求得的r_1相的C曲线表明r_1相脱溶很快。仔细的金相研究发现,所谓的α_r相实为多相。基于试验建立的永磁性与“α_r相”含量的定量关系,清楚地揭示了“α_r相”对永磁性的危害作用。
In this paper, we report several recent studies on the ancient Lu magnetic alloys containing titanium (~ 5%) and high cobalt (~ 34%) developed on the basis of the ancient Lu 5 composition. Experiments confirmed that by thermostatic thermal magnetic treatment, you can get much better than the rate of control of permanent magnetism, Koch and other experiences affirmed; the coercivity of thermostat thermomagnetic processing temperature is very sensitive. The microstructures of samples heated by thermo-thermo-magnetic treatment were studied by electron microscopy. The results show that the different dispersions, different morphologies and different permanent magnetic properties of α ’phase are caused by the different conditions of constant temperature treatment. The C curve obtained from the r_1 phase shows that the r_1 phase is rapidly dissolved. Meticulous metallographic studies have found that the so-called α_r phase is actually heterogeneous. Based on the quantitative relationship between the permanent magnetism and the content of “α_r phase” established experimentally, the harmful effect of “α_r phase” on permanent magnetism is clearly revealed.