利用有限元的方法,以精轧机用粘结相含量为20wt%的YGR45硬质合金辊环为研究对象,分别对轧制速度分别为40 m/s、80 m/s、160 m/s进行轧制模拟;并结合不同的冷却条件,研究了不同轧制速度下硬质合金辊环在高线热轧过程中的的热行为。结果表明:随轧制速度的增加,辊环温度梯度变小,有效的冷却装置能使辊环的最高温度、平均温度和温差保持不变,而没有冷却装置的则不能。高的温度变化速率是高线精轧辊环表面出现热疲劳裂纹的主要因素。 Using the finite element method, the YGR45 hard alloy roll with the binder phase content of 20wt% was used as the finishing roll for the finishing rolling mill at rolling speed of 40 m / s, 80 m / s and 160 m / s, respectively Rolling simulations. Combining with different cooling conditions, the thermal behavior of hard alloy roll rings during high-speed hot rolling under different rolling speeds was studied. The results show that with the increase of the rolling speed, the temperature gradient of the roller ring becomes smaller. The effective cooling device can keep the maximum temperature, the average temperature and the temperature difference of the roller ring unchanged without the cooling device. The high rate of temperature change is the main factor of thermal fatigue cracks on the surface of high-precision finishing roll ring.