Outlet strip steel surface roughness control method suitable for hot continuous rolling unit

Abstract

The invention provides an outlet strip steel surface roughness control method suitable for a hot continuous rolling unit. Under the precondition of collecting strip steel characteristic parameters, rolling process parameters and roller use process parameters to calculate the outlet strip steel surface roughness, the method can control the strip steel surface roughness on the work site according to user requirements on the strip surface roughness through reasonable linked setting of the operating surface roughness and the operating surface hardness of working rollers of F6 and F7 frames of the hot continuous rolling unit and the reduction rate between the two frames, so that the benefits are brought to enterprises.

Description

Technical field: [0001] The invention relates to a method for controlling the surface roughness of strip steel at the exit of a hot continuous rolling mill, belonging to the technical field of hot rolling. Background technique: [0002] Surface roughness is one of the important characteristics of hot-rolled strip steel. It not only affects the deformation behavior of the strip steel during stamping and the appearance after coating, but also can change the corrosion resistance of the material. In the production of high value-added products such as automobile sheets, home appliance sheets, wheels and gas cylinder steels, the requirements for the surface quality of strip steel are very strict, so the research on surface quality has attracted more and more attention. Therefore, how to control the surface roughness value of the hot-rolled finished strip steel to avoid roughness out of tolerance has become the focus and difficulty of on-site technical research. There have been re...

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Problems solved by technology

However, it is not universal to select the surface roughness of work rolls only for a single steel grade

At the same time, the roughness is only controlled for a single frame. Since the elongation takes into account the limitation of the thickness deviation of the exit strip, the range of variation is limited, so there are limitations in controlling the surface roughness of the strip through a single frame.

On the other hand, considering the limitations of roughness control, this document implements roughness auxiliary control by arranging the service period of work rolls. Considering that the on-site production plan is affected by factors such as delivery time and rolling specifications, it is more troublesome to operate

In Bai Zhenhua’s second paper, the exit strip roughness was used as the objective function, and the total elongation and flat shape were taken as constraints, and the surface roughness of the strip was controlled by the distribution of the rolling force between the two stands, but the surface roughness of the strip was ignored. Control Effect of Surface Roughness of Working Roll on Strip Surface Roughness Before Rolling

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