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利用金相试验方法和理论模型研究了9310钢在800～1200℃奥氏体晶粒的长大规律。结果表明,不同加热温度条件下,9310钢的奥氏体平均晶粒尺寸随保温时间的变化符合Beck关系式。实验钢的硬度随平均晶粒尺寸的增大而逐渐降低,并呈近似的线性关系。通过数值回归分析,测得了9310钢奥氏体晶粒度长大的时间指数和激活能,并对9310钢奥氏体晶粒的长大机制进行了讨论。
The growth law of austenite grain size of 9310 steel at 800 ~ 1200 ℃ was studied by metallographic test and theoretical model. The results show that under different heating temperatures, the average austenite grain size of 9310 steel accords with the Beck equation with the change of holding time. The hardness of the experimental steel decreases with the increase of the average grain size and shows an approximate linear relationship. By numerical regression analysis, the time index and activation energy of austenite grain size growth of 9310 steel were measured, and the growth mechanism of 9310 steel austenite grain was discussed.