Device for suppressing roll oxidation rate and application method thereof

Abstract

The present invention discloses a device for suppressing roll oxidation rate and an application method thereof, relates to the field of roll oxidation protection, and aims at solving the problem of slowing down the roll surface oxidation rate. The device is used in a strip steel rolling process, and four-level computer control L4-L1 is adopted during the strip steel rolling process. The device is composed of a couple of gas nozzles respectively installed below water-cutting boards at an operation side and a transmission side of a roll outlet of finish rolling front racks, a nozzle of each gas nozzle is directly facing a contact position of the corresponding water-cutting board and the roll, and each gas nozzle is connected with a nitrogen generation device via a stainless steel pipeline. Open and close of the couple of gas nozzles are controlled by instructions issued by the L2. According to adjustment of the roll diameter and roll gap of the roll, the gas nozzles are driven, gas protection after the roll is broken away from the roll gap is achieved, the probability that the roll surface is in contact with air in a high-temperature stage is reduced, the roll surface oxidation rate is suppressed and controlled, and the foundation is laid for forming a uniform dense oxidation film on the roll surface.

Description

technical field [0001] The invention relates to the field of roll oxidation protection, in particular to a device for suppressing the oxidation rate of rolls during rolling and a method for using the same. Background technique [0002] The improvement of strip surface quality is one of the important signs of product quality. With the development of science and technology, the demand for strip steel is developing in the direction of high strength, thinning and green, which puts forward more stringent requirements for the control of the surface quality of strip steel. The roll is the basic deformation tool in the hot rolling production process. It is closely related to the surface quality and shape of the strip, and determines the operating efficiency of the production line to a large extent. Therefore, the strict requirements on the surface quality of the strip must be Involves improving the surface quality of rolls. [0003] At present, there are relatively mature technolo...

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Problems solved by technology

[0006] (3) Strip cooling, in addition to the cooling of the roll surface, the reduction of the surface temperature of the strip is also very important. In the case of ensuring that the internal temperature of the strip does not drop, there is currently an anti-stripping water device to reduce the temperature of the strip. Steel surface temperature, its disadvantage is that it has a certain interference effect on rolling oil

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