Abstract
The temperature distributions in the slab mill roll were measured experimentally, and the thermal stresses in roll were calculated from the temperature distributions. The following results were obtained.
1. The maximum temperature measured in this experiment is 220°C; inside 3mm from the surface.
2. The maximum temperature at the center of the roll is 120°C.
3. The thermal stress in the roll surface layer by the rolling with cooling water after rolling withoutcolling water is tensile and less than 10kg/mm2.
4. The thermal stress at the center of the roll is tensile and less than 20kg/mm2.
5. The neutral point where the sign of stress changes is about 16cm from the roll surface.
6. The required properties of the roll are as follows;
(1) The surface layer (0-1mm from the surface); strength to heat checking,
(2) The middle part (1-250mm); fatigue strength, and
(3) The inner part (250mm-center); toughness.
