A kind of process method of continuous casting and rolling

Abstract

The invention discloses a continuous casting and rolling technology method. The method comprises the following steps in sequence: continuous casting, rough rolling, induced heating, finish rolling, laminar cooling, flying shearing, and coiling to obtain a finished product, wherein a mechanical cleaning step is performed between the continuous casting step and the rough rolling step, and the mechanical cleaning step comprises the processes of heating an oxidized scale layer, being 1-5mm in thickness, on the surface of a casting blank and other defects into a molten state, and then removing themolten oxides through 1.5-5MP water. According to the method, the mechanical cleaning step is performed between the continuous casting step and the rough rolling step, so that the purpose of completely removing the oxidized scale can be achieved; and meanwhile, the temperature of the casting blank before rough rolling is not influenced; a hot-rolled coil is uniform in thickness, and moreover, thecracks in the continuous casting blank can be welded, and thus the effect of eliminating or improving the surface upwarping defect of the hot-rolled coil can be achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a continuous casting and rolling process. Background technique [0002] From 1970 to 1980, the fukuyama factory of NKK in Japan proposed the concept of slab hot delivery and direct rolling. This process skillfully combines the two processes of casting and rolling. After the billet is cooled, it is sent to the steel rolling workshop. Compared with the process of rolling after being heated by a heating furnace, it has the advantages of simplifying the process, improving working conditions, increasing metal yield, and saving energy. [0003] From 1980 to 1990, SMS CSP and Arvedi's ISP realized industrial application, and the process flow chart is as follows figure 1 with figure 2 shown. However, CSP and ISP need to cut off the slabs before finishing rolling and then enter the finishing rolling mill in groups, which does not realize the continuous casting and steel...

AI Technical Summary

Problems solved by technology

[0008] 1) The billet temperature is reduced by 20°C to 50°C, which affects rough rolling efficiency and puts forward higher requirements for rough rolling equipment;

[0009] 2) Due to the low temperature, a longer heating time is required before finishing rolling, which consumes more energy;

[0010] 3) It increases the difficulty of temperature control and affects the thickness of the final product

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