研究了82B高碳钢在不同加热温度和保温时间下奥氏体晶粒的生长规律。结果表明,在800~1 100℃范围内,随着温度的增加,高碳钢奥氏体晶粒尺寸从18.2μm增加到116.3μm,其中950℃为其晶粒粗化温度。在950℃保温60~90 min后,可获得细小均一的奥氏体晶粒。最后,通过公式计算了高碳钢奥氏体晶粒的长大规律,与实验结果吻合。 The growth rules of austenite grains in 82B high carbon steel at different heating temperature and holding time were studied. The results show that the austenite grain size increases from 18.2μm to 116.3μm with the increase of temperature at 800 ℃ to 1 100 ℃, of which 950 ℃ is the grain coarsening temperature. At 950 ℃ for 60 ~ 90 min, we can get fine uniform austenite grains. Finally, the law of growth of austenite grains in high-carbon steel was calculated by the formula, which is consistent with the experimental results.