Roll break is one of the most common and important problems in the rolling process. The cracks on the rolls can not only affect the surface quality of the rolled products, but also lead to huge losses for the rolling mill. Therefore, the root cause of roll break must be well studied so that targeted preventive and corrective measures can be implemented in time.
In general, the causes of roll break can be divided into three categories: design defects, material defects and operating parameters.
Design defects refer to flaws that exist in the design of the roll itself. These defects include improper roll material selection, incorrect hardness parameters, insufficient strength, improper assembly dimensions and dimensions, and other design errors. The defects in the design stage of the roll can easily cause the roll to deform and break during the rolling process, thus leading to a serious accident.
Material defects refer to the improper selection of the material used in the production process of the roll. Improper selection of the material can cause the roll to have poor performance in use, insufficient strength, and lack of toughness, which can easily lead to roll break during the rolling process. The proper selection of material is governed by the hardness, chemical composition, and metallurgical specifications of the roll.
The last cause of roll break is operating parameters. Operating parameters refer to the size and type of roll, roll speed, roll gap, lubrication pressure, lubricant type and temperature, and other technical parameters that are used in the actual process. Improper operation of these parameters will have a great influence on the performance of the roll during the rolling process. If the parameters are too large or too small, or if the temperature or pressure is too high or too low, it can easily lead to roll break.
In summary, the main causes of roll break include design defects, material defects, and operating parameters. Therefore, in order to effectively prevent and correct the problem of roll break, these aspects must be closely monitored, and the corresponding measures must be taken in time. At the same time, the correct selection of materials, the optimization of design, and the adjustment of operating parameters should always be taken to ensure the safe and smooth production of the rolling mill.
