分塊ロールの温度および熱応力分布

概要

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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℃ ; inside 3 mm from the surface. 2. The maximum temperature at the center of the roll is 120℃. 3. The thermal stress in the roll surface layer by the rolling with cooling water after rolling without colling water is tensile and less than 10 kg/mm^2. 4. The thermal stress at the center of the roll is tensile and less than 20 kg/mm^2. 5. The neutral point where the sign of stress changes is about 16 cm from the roll surface. 6. The required properties of the roll are as follows ; (1) The surface layer (0-1 mm from the surface) ; strength to heat checking, (2) The middle part (1-250 mm) ; fatigue strength, and (3) The inner part (250 mm-center) ; toughness.
1975-07-01