Preliminary communication

Contribution to the thermal properties of selected steels

P. Jonšta ; VŠB-TU Ostrava, FMME, Ostrava, Czech Republic
I. Vlčková ; RMSTC, remote site VÚHŽ a.s. Dobrá, Czech Republic
L'. Krišták ; TU of Zvolen, FWST, Zvolen, Slovak Republic
I. Špička ; VŠB-TU Ostrava, FMME, Ostrava, Czech Republic
Z. Jonšta ; VŠB-TU Ostrava, FMME, Ostrava, Czech Republic

Abstract

The paper deals with the influence of structural changes on heat transport phenomena of steels samples. Three samples of 10GN2MFA steel were thermally treated at quenching temperatures equal to 900 °C, 1 000 °C and 1 100 °C, and temperature of the tempering was 670 °C. Both thermal diffusivity and thermal conductivity increase with the quenching temperature. Specific heat capacity of steel samples after thermal treatment does not change significantly. Further three different high manganese steels were measured. Maximal content of Mn and C was 27 and 0,5 mass percent. From results of thermophysical properties after ageing, one can see the increase of thermal diffusivity up to 20 percent, thermal conductivity up to 15 percent, decrease of specific heat capacity is not significant. All measured values of thermophysical properties are in good agreement with literary data (before ageing).

Keywords

steel alloy; low carbon steel; thermal treatment; thermal diffusivity and conductivity; specific heat capacity

Hrčak ID:

126728

URI

https://hrcak.srce.hr/126728

Publication date:

1.1.2015.

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