摘要
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 heated at 930-1270 ℃ for 30-150 min was measured by metallographic observation, then the theoretical model of grain growth was studied. The results show that the grain size of anstenite increases with the increase of heating temperature and holding time, but the coarsening of the grain is slight when heating temperature is lower than 1100 ℃. Holding at a temperature above 1100 ℃, the austenite grain coarsens obviously. The activation energy for anstenite grain growth can be obtained by regression analysis and the grain growth model of austenite in X120 pipeline steel is established.
出处
《热加工工艺》
CSCD
北大核心
2014年第10期37-39,共3页
Hot Working Technology
基金
河北省自然科学基金-钢铁联合研究基金(E2011105006)
唐山学院科研基金(13001B)资助
