Method for treating thermal vibration composite ageing of cast iron roll in removing stress

Abstract

The invention relates to a method for processing thermal vibration composite ageing of a cast iron roll in removing stress. After the cast iron roll is heated, the cast iron roll is subject to vibration ageing treatment in a heated state. The composite ageing treatment method which combines thermal ageing treatment with vibration ageing treatment is adopted, so the method has the advantages of high efficiency and energy saving of the vibration ageing treatment and stability of the effect of the thermal ageing treatment, and avoids the disadvantages of various ageing treatment, thereby obtaining optimal treatment effect and economic benefits. The method can be applied in a roll plant and a steel mill so that the method is widely applied.

Description

technical field [0001] The invention relates to aging treatment of cast iron rolls, in particular to a method for heat-vibration composite aging treatment of cast iron rolls when stress is eliminated. Background technique [0002] For large cast iron rolls, there is a large residual stress after casting and after each use. In actual production, in order to prolong the service life of cast iron rolls and reduce abnormal failures such as broken rolls, spalling, and cracks, it is necessary to reduce And homogenize the residual stress of the cast iron roll, this process of adjusting the residual stress is called aging treatment. At present, the methods of aging treatment mainly include natural aging treatment, thermal aging treatment and vibration aging treatment. [0003] Natural aging treatment is simple and low in cost. Practice has proved that natural aging treatment has a positive impact on the service life of cast iron rolls. However, the period of natural aging treatment...

AI Technical Summary

Problems solved by technology

The problem with this method at present is that if the process parameters are not properly controlled, the stress relief ratio of the aging treatment effect is not large, or fatigue damage to the material occurs

For some large cast iron rolls with high rigidity and high natural frequency, to a certain extent, they cannot be processed due to the limitation of the speed and power of the excitation equipment.