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11th International Rolling Conference (IRC 2019) — vol. 11, num.11 (2019)
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Abstract
The effect of soaking temperature in the reheating of slabs on the precipitates dissolution and mechanical properties of Ti-Nb microalloyed steel was investigated in pilot scale. It was verified, by means of transmission electron microscopy, a significant decrease in precipitates formed during the solidification of the steel as the soaking temperature increased from 1100°C to 1200°C. No significant changes in size and shape of the precipitates were observed with further temperature increase up to 1280°C. In line with the precipitates dissolution behavior, an increase in mechanical resistance was observed with the elevation of the soaking temperature up to 1200°C, due to the reprecipitation of (Nb,Ti)(C,N) during the rolling/air cooling. After reheating above 1200°C up to 1280°C, it was noticed a decrease in mechanical resistance of the rolled plates. This effect was credited to grain growth. The results were in agreement with Thermo-Calc and Dictra simulations.
Keywords
Reheating plates; Precipitates dissolution; Heavy plates.
How to refer
Murari, Fábio Dian;
Santos, Antônio Adel dos;
Silva, André Luiz Vasconcellos da Costa e;
Rodriguez-Ibabe, José María.
THE EFFECT OF SOAKING TEMPERATURE ON THE DISSOLUTION OF PRECIPITATES AND ON THE MECHANICAL PROPERTIES OF MICROALLOYED STEEL HEAVY PLATES
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p. 98-109.
In: 11th International Rolling Conference (IRC 2019),
São Paulo,
2019.
ISSN: -
, DOI 10.5151/9785-9785-32213
