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The effect of tempering temperature on the coercive force of high-carbon steels measured at room temperature and a temperature above the curie point of cementite

  • Magnetic Methods
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Abstract

The role of cementite in the formation of the H c of carbon steels after quenching and tempering is determined based on analysis of dependences of the coercive force of У9A steel in the measurement temperature range from the temperature of liquid nitrogen to the cementite Curie point. It is shown that the key contribution to the formation of the maximum in the H c (T temp) dependence measured at room temperature is due to the magnetic hardness of cementite, whose maximum lies at T temp = 500°C. The coercive force measured at 250°C is mainly related to the interaction of the domain walls of the ferrite matrix with nonferromagnetic inclusions of cementite, the maximum of which is at T temp = 400°C, thus causing a shift of the maximum in the H c (T temp) dependence measured at the temperature above the cementite Curie point toward lower tempering temperatures.

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Authors and Affiliations

  1. Physicotechnical Institute, Ural Branch, Russian Academy of Sciences, Izhevsk, 426000, Russia

    A. I. Ul’anov & A. A. Chulkina

  2. Institute of Engineering Science, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620219, Russia

    E. S. Gorkunov

Authors
  1. A. I. Ul’anov
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  2. A. A. Chulkina
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  3. E. S. Gorkunov
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Correspondence to A. I. Ul’anov.

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Original Russian Text © A.I. Ul’anov, A.A. Chulkina, E.S. Gorkunov, 2010, published in Defektoskopiya, 2010, Vol. 46, No. 9, pp. 3–9.

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Ul’anov, A.I., Chulkina, A.A. & Gorkunov, E.S. The effect of tempering temperature on the coercive force of high-carbon steels measured at room temperature and a temperature above the curie point of cementite. Russ J Nondestruct Test 46, 627–631 (2010). https://doi.org/10.1134/S1061830910090019

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  • DOI: https://doi.org/10.1134/S1061830910090019

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