Dynamic continuous cooling transformation and microstructure evolution of IF steel by simulating TSCR
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摘要: 采用Gleeble-1500熱模擬試驗機,研究了薄板坯連鑄連軋工藝條件下(TSCR)無間隙原子鋼(IF鋼)的動態連續冷卻轉變規律,并分析了其組織演變規律.研究表明:Ti-IF鋼的相變開始溫度隨著冷卻速度的增大而下降,即Ar3降低,有利于低溫終軋,并獲得性能良好的IF鋼.同時IF鋼的硬度值隨著冷卻速度的增大而增大,冷卻速度從1℃/s變化到30℃/s時,HRB從53.4增加到68.3,即其強度隨冷卻速度增大而增加.Abstract: By using a Gleeble-1500 thermomechanical simulator, the laws of dynamic continuous cooling transformation and microstructure evolution of interstitial free steel (IF steel) produced by TSCR were investigated. It was found that the transformation temperature Ar3 decreases with the cooling rate increasing, which is beneficial to the low-temperature finish rolling and more excellent property of IF steel. The hardness increases with increasing the cooling rate. When the cooling rate rises from 1℃/s to 30℃/s, the HRB value correspondingly increases from 53.43 to 68.3. As a result, the strength improves with increasing the cooling rate.
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Key words:
- TSCR /
- IF steel /
- continuous cooling transformation /
- microstucture
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