Method of composite thermal and vibratory ageing treatment by utilizing working afterheat of grain roll

A cast iron roll and aging treatment technology, applied in heat treatment furnaces, heat treatment equipment, process efficiency improvement, etc., can solve the problems of material fatigue damage, aging treatment effect, stress relief ratio is not large, process parameter control is not appropriate, etc., to achieve high efficiency Energy-saving effect, best treatment effect and economic benefit, effect of improving residual stress reduction effect

Inactive Publication Date: 2010-06-09
DONGHUA UNIV
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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

Method used

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  • Method of composite thermal and vibratory ageing treatment by utilizing working afterheat of grain roll
  • Method of composite thermal and vibratory ageing treatment by utilizing working afterheat of grain roll

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Embodiment Construction

[0014] 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.

[0015] The embodiment of the present invention relates to a method of thermo-vibration composite aging treatment using the waste heat of the cast iron roll, using the waste heat of the cast iron roll and the slow cooling time to perform vibration aging treatment on it, including the following steps: (1) The above-mentioned cast iron roll is placed on the roll frame in the slow cooling pit for slow cooling, wherein a pair of cas...

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Abstract

The invention relates to a method of composite thermal and vibratory ageing treatment by utilizing the working afterheat of a grain roll, which performs the vibratory ageing treatment on the grain roll by utilizing the working afterheat and the retarded cooling time of the grain roll. By adopting the method of the composite thermal and vibratory ageing treatment which combines the thermal aging treatment and the vibratory ageing treatment, the invention not only has the advantages of high efficiency and energy conservation of the vibratory ageing treatment and the advantage of stable effect of the thermal ageing treatment, but also overcomes the shortcomings of various ageing treatments, thereby achieving best treatment effect and economic benefit. Because the working afterheat and the retarded cooling time of the grain roll are utilized sufficiently and consciously, the effect of reducing residual stress is improved on the premise of not adding the energy and the time for the ageing treatment.

Description

technical field [0001] The invention relates to the aging treatment of cast iron rolls, in particular to a thermal-vibration composite aging treatment method utilizing the working waste heat of cast iron rolls. 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...

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Application Information

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IPC IPC(8): C21D9/38C21D1/78
CPCY02P10/20
Inventor 范金辉朱世根顾伟生
Owner DONGHUA UNIV
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