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

A technology for cast iron rolls and stress relief, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve problems such as material fatigue damage, aging treatment effect stress relief ratio is not large, process parameter control is not appropriate, etc., to reduce residual stress , best treatment effect and economic benefits, wide application effect

Inactive Publication Date: 2010-05-12
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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Embodiment Construction

[0012] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0013] The embodiment of the present invention relates to a method for thermal shock composite aging treatment of cast iron rolls during stress relief, including the following steps: (1) putting the cast iron rolls into a heater and heating them, wherein the cast iron rolls The roll is at normal temperature; (2) When the temperature of the cast iron roll reaches 400-500°C, remove the cast iron roll and vibrate it with a vibrato...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D5/00C21D9/38C21D1/78
Inventor 范金辉朱世根顾伟生
Owner DONGHUA UNIV
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