Soft measurement method of thickness of scale on surface of hot continuous rolling strip steel

Abstract

The invention relates to a soft measurement method of thickness of scale on the surface of hot continuous rolling strip steel, belonging to the technical field of steel rolling. The measurement method builds a thickness soft measurement model, conducts real-time communication with the process computer of hot continuous rolling for inputting on-line to call alloying constituent, technological parameter, real-time temperature parameter and time parameter from a process computer database to serve as parameters to be input, can carry out pre-measurement on the thickness of the scale in the hot rolling process, and modifies the technological parameters of each stage according to the measuring result, thereby adjusting the hot rolling process so as to reduce the thickness of the scale and improve the surface quality of the strip steel.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, in particular to a soft measurement method for the thickness of oxide scale on the surface of hot continuous rolling strip steel. Background technique [0002] In the process of hot strip rolling, scale thickness control is one of the key technologies for surface quality control. Tracking the change process of surface scale thickness is the basis for realizing scale structure control. However, due to surface temperature changes during hot rolling It is complex and the sampling points of the rolling line are limited, so it is very difficult to track the evolution of scale during the hot rolling process. [0003] At present, most of the research on scale is focused on the measures to clean the scale on the surface of the steel plate and the control of the scale structure. Billet hot-rolled strip steel includes composition design, descaling process, rolling and cooling process, but it is main...

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Problems solved by technology

[0002] In the process of hot strip rolling, scale thickness control is one of the key technologies for surface quality control. Tracking the change process of surface scale thickness is the basis for realizing scale structure control. However, due to surface temperature changes during hot rolling It is complex and the sampling points of the rolling line are limited, so it is very difficult to track the evolution of scale during the hot rolling process

[0003] At present, most of the research on scale is focused on the measures to clean the scale on the surface of the steel plate and the control of the scale structure. Billet hot-rolled strip steel includes composition design, descaling process, rolling and cooling process, but it is mainly aimed at the short-process production line of medium and thin slabs, and the main solution is how to remove surface red rust, while There is no mention of scale thickness; such as Chinese Patent Application No. 200610147265.X "Measurement of hot-rolled scale and the method and application of oxide phase density therein" provides the determination of hot-rolled scale and oxide surface density therein According to the method, according to the area of ​​the hot-rolled scale to be measured on the surface, the value of the surface density of the scale is calculated, and the value of the surface density of the scale can be used to obtain the average thickness of the hot-rolled scale, but there is no specific calculation method for the thickness of the scale. It has been mentioned that at this stage, the detection of scale thickness is mostly focused on the detection of finished steel plate sampling. At this time, the test result is the final thickness of scale iron, and there is no necessary description for the evolution of scale thickness during hot continuous rolling. In the hot continuous rolling process, the evolution of scale thickness is closely related to the temperature of the steel plate, rolling conditions and other factors, and it is impossible to directly measure the change of scale thickness in the whole process of rolling, so it is difficult to satisfy people's requirements for the thickness of scale in the whole rolling line. The need for real-time monitoring is not conducive to process optimization to reduce the thickness of oxide scale and improve the surface quality of strip steel

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