INVESTIGATION OF MAGNETIC HYSTERESIS PROPERTIES OF ISOTROPIC MAGNETICALLY HARD ALLOYS OF THE Fe-Cr-Co SYSTEM ALLOYED WITH TUNGSTEN

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription or Fee Access

Abstract

Hard magnetic alloys Fe-30Cr-20Co (wt.%) alloyed with tungsten in an amount of up to 3 wt.% were obtained by powder metallurgy. A study of magnetic properties showed that tungsten additions increase the values of the coercivity Hc and the maximum energy product (BH)max, but at the same time reduce the residual induction Br. This effect increases with increasing tungsten content in the material. The maximum values of Hc (55.8 kA/m) and (BH)max (17.2 kJ/m3) are observed in the alloy alloyed with 3 wt.% W. At the same time, the alloys studied in the work turned out to be sensitive to thermal conditions processing. According to X-ray phase analysis, after a full processing cycle, alloys contain a noticeable proportion of non-magnetic ɣ-phase, but the magnetic properties correspond to the level of cast analogues. During compression tests, all samples of tungsten alloyed alloys failed before reaching a deformation rate of 20%, while the unalloyed Fe-30Cr-20Co (wt.%) alloy deformed without failure under these conditions. Thus, tungsten additives reduce the ductility of the material.

About the authors

A. S Ustyukhin

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia

Email: fcbneo@yandex.ru

V. A Zelenskiy

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia

Email: eliz@imet.ac.ru

I. M Milyaev

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia

Email: eliz@imet.ac.ru

M. I Alymov

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia; Merzhanov Institute of Structural Macrokinetics and Materials Science Russian Academy of Sciences (ISMAN), Chernogolovka, Russia

Email: eliz@imet.ac.ru

D. Yu Kovalev

Merzhanov Institute of Structural Macrokinetics and Materials Science Russian Academy of Sciences (ISMAN), Chernogolovka, Russia

Email: eliz@imet.ac.ru

V. S Shustov

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia

Author for correspondence.
Email: eliz@imet.ac.ru

References

  1. Kaneko, H. New ductile permanent magnet of Fe-Cr-Co system / H. Kaneko, M. Homma, K. Nakamura // AIP Conf. Proc. 1972. V.5. №1. P.1088-1092.
  2. Korznikov, A. The effect of the heat treatment regime on the structure and physical-mechanical properties of a 23X15KT hard magnetic alloy / A.V. Korznikov, S.V. Dmitriev, G.F. Korznikova, S.V. Gladkovskii, A.I. Potekaev // Russ. Phys. J. 2015. V.57. P.1308- 1312.
  3. Ustyukhin, A.S. Synthesis, thermal treatment, and characterization of sintered hard magnetic Fe-30Cr-16Co alloy / A.S. Ustyukhin, A.B. Ankudinov, V.A. Zelensky, M.I. Alymov, I.M. Milyaev, T.A. Vompe //j. Alloys Comp. 2022. V.902. Art.163754.
  4. Mukhamedov, B.O. Spinodal decomposition in ternary Fe-Cr-Co system / B.O. Mukhamedov, A.V. Ponomareva, I.A. Abrikosov //j. Alloys Comp. 2017. V.695. P.250-255.
  5. Zhang, L. Spinodal decomposition in Fe-25Cr-12Co alloys under the influence of high magnetic field and the effect of grain boundary / L. Zhang, Z. Xiang., X. Li, E. Wang // Nanomaterials. 2018. V.8. P.578.
  6. Cherednichenko, I.V. Structure formation of the highly coercive state in Fe-Cr-Co-Mo alloys / I.V. Cherednichenko, V.S. Shubakov, R.I. Malinina, A.S. Perminov, V.P. Menushenkov // Steel in Transl. 2010. V.40. P.93-97.
  7. Ustyukhin, A.S. The study of the magnetic properties of Fe-30Cr-(8-16)Co powder hard magnetic alloys / A.S. Ustyukhin, V.A. Zelensky, I.M. Milyaev, A.B. Ankudinov // AIP Conf. Proc. 2020. V.2315. №1. P.040-047.
  8. Han, X. Effects of multi-stage aging on the microstructure, domain structure and magnetic properties of Fe-24Cr-12Co-1,5Si ribbon magnets / X. Han, S. Bu, X. Wu, J. Sun, Y. Zhang, C. Cui //j. Alloys Comp. 2017. V.694. P.103-110.
  9. Tao, S. Effects of Sm on structural, textural and magnetic properties of Fe-28Cr-20Co-3Mo-2V-2Ti hard magnetic alloy / S. Tao, Z. Ahmad, P. Zhang, X. Zheng, S. Zhang //j. Alloys Comp. 2020. V.816. P.152-619.
  10. Tao, S. Enhancement of magnetic and microstructural properties in Fe-Cr-Co-Mo-V-Zr-Y permanent magnetic alloy / S. Tao, Z. Ahmad, P. Zhang, X. Zheng, F. Wang, X. Xu //j. Magnetism and Magn. Mater. 2019. V.484. P.88-94.
  11. Szymura, S. The effect of silicon on the structure and properties of Fe-Cr-Co permanent magnet alloys / S. Szymura, L. Sojka //j. of Magnetism and Magn. Mat. 1986. V.53. №4. P.379-389.
  12. Malinina, R.I. Heat treatment and properties of plastically deforming, highly coercive iron alloy (30% Cr, 15% Co, 2% W, 1% Mo and 1% Ti) / R.I. Malinina, V.S. Shubakov, E.Kh. Zhukova, D.G. Zhukov // Steel in Transl. 2013. V.43. №5. P.270-273.
  13. Устюхин, А.С. Исследование фазового состава порошкового магнитотвердого сплава Fe-30Cr-(8-24)Co, спеченных при различных температурных режимах / А.С. Устюхин, А.Б. Анкудинов, В.А. Зеленский, И.М. Миляев, А.А. Ашмарин, М.И. Алымов // ДАН. Сер. Физ. химия. 2018. Т.483. №2. С.170-174.
  14. Alberry, P.J.Interdiffusion of Cr, Mo, and W in iron / P.J. Alberry, C.W. Haworth // Met. Sci. 1974. V.8. P.407-412.

Supplementary files

Supplementary Files
Action
1. JATS XML
Download

Copyright (c) 2023 Russian Academy of Sciences