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以热轧带钢卷取后的钢卷为主要研究对象,运用有限元分析软件MARC,建立了带钢卷取后钢卷的温度场模型,相变模型,计算了钢卷缓冷至室温过程中的温度场变化情况以及不同时刻各相的分布情况。计算表明,对于钢卷的温度场分布,冷却的最慢点在靠近钢卷内径壁的1/3处,钢卷的最大温差发生在冷却后的第9 h,达到了314℃。带钢卷取后的冷却过程中,奥氏体不再转变为铁素体,铁素体含量始终保持在82.27%~83.026%。残余奥氏体则继续转化为珠光体和贝氏体,含量分别为16.45%~17.73%和0.524%~0.546%,马氏体只在带钢端部出现少量。
Taking the coiled steel coil as the main research object, the finite element analysis software MARC was used to establish the temperature field model and the phase transition model of the coiled steel coil. The coiling temperature was slowly cooled to room temperature In the temperature field changes and the distribution of each phase at different times. The calculation shows that for the temperature distribution of the coil, the slowest point of cooling is about 1/3 of the inner diameter wall of the coil, and the maximum temperature difference of the coil occurs at the 9th hour after cooling, reaching 314 ℃. During coiling, the austenite is no longer transformed into ferrite and the ferrite content remains at 82.27% to 83.026%. The retained austenite continues to be transformed into pearlite and bainite, with contents of 16.45% -17.73% and 0.524% -0.546%, respectively. The martensite only shows a small amount at the end of the strip.