Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Carbon in hard magnetic alloys

Conclusions

  1. 1.

    With increasing carbon concentrations in Alnico alloys the effective number of conduction electrons increases, which increases the thermal stability of γ phase. A single-phase structure cannot be obtained with over 0.05% C.

  2. 2.

    The precipitation of strongly magnetic phase from the supercooled solid solution occurs at 620–880°. The presence of γ phase in the original structure, the amount of which increases with the carbon content of the alloy, inhibits the formation of high-coercivity structure, and impairs the magnetic properties.

  3. 3.

    With increasing amounts of carbon the temperature of the αγ→γ polymorphous transformation shifts to higher temperatures — from 480° with 0.005% C to 520° with 0.2% C.

This is a preview of subscription content, log in to check access.

Literature cited

  1. 1.

    F. Cone, Metals and Alloys, No. 10, 293 (1939).

  2. 2.

    B. G. Livshits, "Effect of C, Si, and Mn on magnetic properties of Fe-Ni-Al alloy", Stal', No. 6, 40 (1941).

  3. 3.

    A. A. Sazonova, "Effect of carbon content on the variation of coercive force during tempering", Fiz. Metal. Metalloved.,19, No. 5, 774 (1965).

  4. 4.

    N. I. Mikheev, Ya. M. Dovgalevskii, and E. G. Povolotskii, "Effect of carbon in Magnico alloys", Metalloved. Term. Obrab. Met., No. 6, 33 (1966).

  5. 5.

    A. Bämel, H. Kappert, and D. Fischer, Arch. Eisenhüttenwes.,37, No. 8, 647 (1966).

  6. 6.

    Kadzua Yamanova, Cast and Forge,19, No. 66, 48 (1966).

  7. 7.

    Yoshio Kamata and Takeshi Anbo, J. Japan Inst. Metals,31, No. 9, 1053 (1967).

  8. 8.

    Ya. M. Dovgalevskii, G. P. Vasin, and V. L. Volkov, "Heat treatment of Magnico alloys with a high carbon content", in: Transactions of Saratov Polytechnic Institute [in Russian], No. 33 (1968), p. 52.

  9. 9.

    V. M. Kuznetsov, E. S. Lobyntsev, and A. M. Samarin, "Effect of alloying with Si, Nb, V, Ti, Zr, Cr and melting procedure on structure and magnetic properties of Fe-Co-Ni-Al-Cu alloys", in: Physicochemical Basis of Steel Production [in Russian], Nauka, Moscow (1971), p. 96.

  10. 10.

    A. Koch, M. Steeg, andK. de Yos, Conf. Magnet. and Magnetic Materials, Boston, Amer. Inst. Elect. Eng. (1958), p. 173.

  11. 11.

    E. Planchard, R. Meyer, and C. Brenner, Z. Angew. Phys.,17, No. 3, 174 (1964).

  12. 12.

    Ya. M. Dovgalevskii, Alloying and Heat Treatment of Hard Magnetic Alloy [in Russian], Metallurgiya, Moscow (1971), p. 35.

Download references

Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 49–51, February, 1977.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Kuznetsov, V.M. Carbon in hard magnetic alloys. Met Sci Heat Treat 19, 133–136 (1977). https://doi.org/10.1007/BF00703159

Download citation

Keywords

  • Precipitation
  • Solid Solution
  • Thermal Stability
  • Magnetic Property
  • Carbon Content