Ti-IF钢第二相粒子在热轧过程中析出行为的热模拟研究

STUDY ON PRECIPITATION BEHAVIOR OF TI-IF STEEL DURING HOT ROLLING THROUGH THERMO-MECHANICAL SIMULATION

对 Ti- IF钢进行再加热、热轧及卷取等过程的热模拟试验 ,用透射电镜对样品中析出物的形貌进行了观察 ,系统研究了各析出物在热轧过程中变化的全过程。结果表明 ,Ti N粒子在热轧和卷取过程中变化不大、比较稳定 ;Ti S和 Ti4C2 S2 粒子在热轧过程中继续析出、长大 ,并发生 Ti S与 Ti4C2 S2 的转变 ;Ti C粒子主要在热轧和卷取过程中析出。

Thermo mechanical simulation test was carried out to simulate the process of reheating, hot rolling and coiling of Ti IF steel, the precipitation behavior of precipitates was observed and analyzed by transmission electron microscope (TEM) during the hot rolling. It is shown that TiN particles are stabile during the hot rolling and coiling, TiS and Ti 4C 2S 2 particles continue to precipitate and coarse during the hot rolling, and TiS changes to Ti 4C 2S 2, TiC particles mainly precipitate and coarsen during the hot rolling and coiling.