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Thermal analysis of low alloy Cr-Mo steel

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Abstract

The paper deals with results of thermal analysis of low-alloyed chromium-molybdenum steel. The methods of analysis were dilatometry, differential thermal analysis (DTA) and differential scanning calorimetry (DSC). The Ac1 and Ac3 temperatures of the steel samples measured by dilatometry and DTA during the heating period were in good agreement. Generated by cooling a martensitic structure first became apparent at 503 K. Tempering of the as-quenched samples showed the presence of the second tempering stage in the region between 473 and 573 K. At that stage heat capacity decreased from 0.48 to 0.32 J g-1 K-1, as a result of conversion of transition carbide due to heat consumption. After normalization of the as-quenched samples the heat capacity values were restored to between 0.42 and 0.47 J g-1 K-1 in the temperature range from 373 to 673 K.

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Authors and Affiliations

  1. Faculty of Metallurgy, University of Zagreb, Aleja narodnih heroja 3, Sisak, Croatia E-mail

    M. Gojić

  2. Shipbuilding Institute and Special Technology, Laboratory for Thermal Analysis, Avenija V. Holjevca 20, 10000, Zagreb, Croatia

    M. Sućeska & M. Rajić

Authors
  1. M. Gojić
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  2. M. Sućeska
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  3. M. Rajić
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Correspondence to M. Gojić.

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Gojić, M., Sućeska, M. & Rajić, M. Thermal analysis of low alloy Cr-Mo steel. Journal of Thermal Analysis and Calorimetry 75, 947–956 (2004). https://doi.org/10.1023/B:JTAN.0000027188.58396.03

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  • DOI: https://doi.org/10.1023/B:JTAN.0000027188.58396.03

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