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Effect of prior aging and flat rooling on the structure and magnetic properties of alloys of the Fe-Cr-Co-Cu system

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Conclusions

  1. 1.

    In alloys based on Fe−33% Cr−12% Co−2% Cu alloyed with 1% Al (alloy 2) or 1.5% Nb (alloy 3) the temperature for quenching to α-solid solution is reduced from 1050 (alloy 1) to 1000 (alloy 2) or 950°C (alloy 3). The temperature for the start of α-solid solution decomposition for the alloys is 935–640°C.

  2. 2.

    Additional alloying with 1% Al and 1.5% Nb leads to a reduction in α-solid solution grain size and to creation of better conditions for intermediate plastic deformation.

  3. 3.

    As a result of intermediate flat rolling α1-phase precipitates take on a lamellar shape. In this way shape anisotropy is observed for α1-phase precipitates.

  4. 4.

    The optimum structure of strain aged alloys is obtained with vp.a=50° K/h., ε=67%, and final aging with controlled cooling from 600 to 550°C at a rate of 15° K/h. and from 550 to 500°C at a rate of 8°K/h [1].

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Literature cited

  1. S. Jin, "Deformation induced anisotropic Cr-Co-Fe permanent magnet alloys" IEEE Trans. Mgn.,15, 1748–1750 (1979).

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  2. H. Kaneko, M. Homma, M. Okada, et al., "Fe-Cr-Co ductile magnet with (BH)max=8M.G.Oe", Magn. Magn. Mater., AIP Conf. Proc., Philadelphia No. 29, 620–621 (1975).

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  3. N. N. Konev and B. A. Samarin, "Effect of wire drawing on the structure and magnetic properties of strain-aged alloys based on Fe-Cr-Co-Cu", Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 5, 86–88 (1983).

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  4. N. N. Konev, B. A. Samarin, and I. A. Mekhem, "Structure and magnetic properties of alloys based on Fe-Cr-Co-Cu subjected to strain aging with rolling in grooved rolls", Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 11, 78–79 (1982).

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  5. M. Homma, "Permanent magnets in the Fe-Cr-Co system", First Internat. Seminar on Magnetism (1977).

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Authors
  1. B. A. Samarin
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  2. A. E. Kolchin
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  3. Yu. V. Kal'ner
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Additional information

Moscow Institute of Steels and Alloys (MISiS). Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 54–56, September, 1986.

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Samarin, B.A., Kolchin, A.E. & Kal'ner, Y.V. Effect of prior aging and flat rooling on the structure and magnetic properties of alloys of the Fe-Cr-Co-Cu system. Met Sci Heat Treat 28, 690–693 (1986). https://doi.org/10.1007/BF00742754

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  • DOI: https://doi.org/10.1007/BF00742754

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