论文部分内容阅读
利用金相实验方法测定了在930~1270℃保温30~150min时X120管线钢的奥氏体晶粒尺寸,并对其晶粒长大的理论模型进行了研究。结果表明:随加热温度的上升和保温时间的延长,晶粒尺寸逐渐增加。当温度低于1100℃时,晶粒的长大较为缓慢;加热温度超过1100℃后,晶粒迅速粗化。通过回归分析,获得了X120管线钢的奥氏体晶粒长大激活能,建立了X120管线钢奥氏体晶粒长大的数学模型。
The austenite grain size of X120 pipeline steel was measured at 930 ~ 1270 ℃ for 30 ~ 150min by metallographic method. The theoretical model of grain growth was also studied. The results show that with the increase of heating temperature and holding time, the grain size increases gradually. When the temperature is below 1100 ℃, the growth of the grains is slow; when the heating temperature exceeds 1100 ℃, the grains rapidly coarsen. Through regression analysis, the austenite grain growth activation energy of X120 pipeline steel was obtained, and the mathematical model of austenite grain growth of X120 pipeline steel was established.