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采用差示扫描量热法(DSC)热分析设备进行了奥氏体相变激活能的研究,通过测定10Mn5试验钢冷轧和温轧两种状态下的热流-温度曲线计算了逆相变激活能和相变激活能。绘制了相变体积分数与温度之间的关系曲线。结果表明,钢温轧态奥氏体逆相变激活能(788.5 k J/mol)小于冷轧态奥氏体逆相变的激活能(1030 k J/mol);温轧态奥氏体逆相变能量门槛低,转变较容易。当相变体积分数大于50%后,冷轧和温轧的奥氏体相变激活能的变化趋势是随着奥氏体体积分数的增加而逐渐减小。
The activation energy of austenite transformation was investigated by differential scanning calorimetry (DSC) thermal analysis equipment. The reverse phase change activation was calculated by measuring the heat flux versus temperature curve of 10Mn5 cold rolled steel and warm rolled steel. Can and phase change activation energy. The plot of the phase change volume fraction versus temperature is plotted. The results show that the activation energy (788.5 kJ / mol) of austenite at the steel temperature is smaller than the activation energy (1030 kJ / mol) of the austenite at cold rolling. Phase transition energy threshold is low, the transition easier. When the volume fraction of phase transformation is more than 50%, the variation tendency of austenite transformation activation energy in cold rolling and warm rolling decreases with the increase of austenite volume fraction.