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本文从分析热轧板带轧辊温度场模型和辊内应力入手,进而分析轧辊的强度破坏和热疲劳破坏机理。认为热应力作用下的疲劳破坏是影响轧辊使用寿命的重要因素。并介绍了按断裂力学理论计算轧辊破坏应力的方法。
Based on the analysis of the temperature field model and the stress inside the roll, the strength failure and thermal fatigue failure mechanism of the roll are analyzed. It is considered that the fatigue failure under the action of thermal stress is an important factor that affects the service life of the roll. The method of calculating the failure stress of the roll according to the fracture mechanics theory is introduced.