本文提出了确定冷轧辊的非定常热应力的方法.根据轧制过程中冷轧辊横截面所产生热应力的特点,即由轧辊辊身外表面与内孔表面间的温度差,并且通过一定的变换,将非定常温度场转换成定常热应力问题,给出了计算空心冷轧辊非定常热应力的公式.计算结果表明,这些公式应用时较为简便,为冷轧辊热强度设计提供了理论根据. In this paper, a method to determine the unsteady thermal stress of cold roll is proposed.According to the characteristics of the thermal stress produced by the cross-section of the cold roll in the process of rolling, namely the temperature difference between the outer surface of the roll body and the inner bore surface, Transform the unsteady temperature field to the problem of constant thermal stress, and give the formula to calculate the unsteady thermal stress of the hollow chilled roll.The calculation results show that these formulas are simple and convenient to be applied, which provides a theoretical basis for the design of hot roll strength of the cold roll.