Analysis of transformation kinetics of 1035 steel at different cooling rates

Abstract

In this paper, the enthalpy change of 1035 steel during phase transformation at different cooling rates was measured by differential scanning calorimetry (DSC). The activation energy of the phase transformation process was calculated by the equal conversion method, and the mechanism function of the process was also determined. The results shown that the value of the activation energy of phase transformation process varied with the transformation fraction, and the mechanism functions of transformation process are different in different temperature ranges, which are –ln(1–α)1/3 for ≥ 645 °C –ln(1–α) 1/2 for 660-655 °C and –ln(1–α) for 650-645 °C respectively.

Keywords

• 1035 steel
• DSC
• phase change
• the activation energy
• the transformation fraction