Ferritic rolling method based on dynamic change schedule of endless rolling

Abstract

The invention discloses a dynamic variable procedure ferrite rolling method based on endless rolling. A cooling channel is arranged between induction heating and a finishing rolling mill group, and the temperature matching is adjusted and controlled between the induction heating and the cooling channel, so that the finishing rolling mill group realizes austenite zone rolling and ferrite zone rolling in the dynamic variable procedure correspondingly. The ferrite rolling method realizes continuous non-stop production under the condition that an existing production line is basically unchanged. Meanwhile, through the cooperative use of the induction heating and the cooling channel, full continuous non-stop flexible rolling can be realized, the yield is further improved. In addition, during andafter the process of dynamic variable procedure of the endless rolling, lower heating temperature is adopted by the induction heating, the temperature rise of a roll can further be reduced, thus thefatigue cracking and fracture of the roll caused by thermal stress are reduced, the roll abrasion is reduced and the surface quality of endless rolling products is improved, the heating energy consumption of enterprises can be greatly reduced, and an important role in energy conservation, environmental protection and improving economic benefits of the enterprises is played.

Description

technical field [0001] The invention belongs to the field of iron and steel material engineering, and relates to a ferrite rolling method, in particular to a ferrite rolling method based on endless rolling dynamic variable schedule. Background technique [0002] The iron and steel industry is the main carrier of national industrial responsibilities. In the new period of development of China's iron and steel industry, the main contradiction faced by my country's iron and steel industry has been transformed into the contradiction between the industrial structure and the market competition demand, and the green development level and the ecological environment demand. . my country's iron and steel industry is in a critical period of transformation from large to strong. Major iron and steel enterprises strengthen scientific and technological innovation, seize historical opportunities, and jointly promote the transformation and upgrading of the iron and steel industry. [0003] As...

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Problems solved by technology

[0007] The above ferritic rolling methods have their own characteristics, but most of them are used in traditional hot rolling production lines. When Chinese patent 201610768866.6 and Chinese patent 201710960186.9 are applied to endless rolling production lines, cooling pipes are set up between stands, and precision The cooling channel is added before the rolling unit. When it is applied to the endless rolling production line, during the ferritic rolling process, when the rolls of the finishing rolling unit are worn out and the rolls need to be changed online, the machine needs to be stopped to change the rolls, and the entire production is forced to stop. The production capacity is extremely limited, and in the ferritic rolling process, it is impossible to freely switch to the conventional austenitic rolling according to the change of regulations. Therefore, there is an urgent need for a dynamic ferritic rolling method based on endless rolling Full continuous non-stop production, and can realize small batch mass customization according to needs

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