Параметризація математичної моделі кінетики рекристалізації низьковуглецевої сталі у феритній області в процесі відпалу

• Datum: 2024
• Hauptverfasser: Каверинський, В.В., Троцан, А.І., Сухенко, З.П.
• Format: Artikel
• Sprache: Ukrainisch
• Veröffentlicht: Physico-technological Institute of Metals and Alloys 2024
• Schlagworte: первинна рекристалізація; математична модель; кінетика рекристалізації; дріт; холодна деформація; рекристалізований відпал
• Online Zugang: https://www.metalsandcasting.com/index.php/mcu/article/view/226
• Назва журналу: Metal and Casting of Ukraine

An experimental study was performed for the case of recrystallization kinetics of low-carbon steel wire (0.06 % of C) obtained by cold drawing. The influence of the deformation degree and the annealing temperature in the ferrite region on the rate of the primary recrystallization process was studied. According to the model, these parameters are the most significant in the case of the same chemical composition. The study allowed us to estimate the parameters values needed for our mathematical model proposed earlier and thus made it applicable for the structural processes description that occurs during recrystallization annealing of ferrite steel at temperatures below A1. Comparison of the results of the updated mathematical model with the obtained experimental data is demonstrated. The analysis of the obtained results showed that at lower annealing temperatures (620–630 °C), the influence of the preliminary deformation degree on the rate of recrystallization is more significant: an increase in deformation accelerates recrystallization. Increasing the annealing temperature significantly accelerates the recrystallization process. At the same time, the degree of the previous deformation acquires much lesser effect. In fact, at annealing temperatures of 690–700 °C, this influence almost disappears for the considered range of deformation degrees (73–84 %). Specific data on the time of primary recrystallization for work-hardened steel of the considered type were also obtained, in particular: at annealing temperatures of 620–630 °C the process of complete primary recrystallization requires 100–120 seconds if a previous cold deformation was 84 % and at least 400 seconds if it was 73 %. At an annealing temperature of 690–700 °C the primary recrystallization of such steel takes about 50–60 seconds.