What heating is used for hot rolling rolls of rolling mills
2024/04/24
Rolling Mill Hot rolling rolls are usually heated using a furnace. The working temperature of the hot rolling roll is usually between 700 ℃ and 800 ℃, and it needs to bear a strong rolling force. At the same time, the surface must bear the wear of the rolled material, and it is repeatedly heated by the hot rolled material and cooled by the cooling water. Thermal fatigue effect with large temperature changes. Therefore, the hot rolling roll material must have high hardenability, low thermal expansion coefficient, high thermal conductivity and high high temperature yield strength and wear resistance. High chromium cast iron rolls have good thermal crack resistance, because a dense and tough chromium oxide film is formed on the surface of the roll, which can reduce the number and depth of thermal cracks.
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