Heating device and rolling device for online rolling of thick steel plate and rolling method thereof

Abstract

The invention discloses a heating device and a rolling device for online rolling of a thick steel plate and a rolling method thereof, and belongs to the field of rolling. The heating device comprisesan alternating current power supply, an upper coil and a lower coil, wherein the upper coil is located just above the lower coil; the left and right sides of the upper coil are respectively bent to the lower coil, and/or the left and right sides of the lower coil are respectively bent to the upper coil; a channel through which a to-be-rolled thick steel plate can pass is formed between the upper coil and the lower coil; and the alternating current power supply is used for respectively supplying power to the upper coil and the lower coil. According to the heating device, the power supply is controlled to input same or opposite phase current to the special coils, so that super-audio frequency induction heating and medium-frequency induction heating are respectively performed at different stages of the online rolling process of the thick steel plate, the thick steel plate is efficiently and uniformly heated before rolling, finally, the heating requirements of the different stages of the online rolling process of the thick steel plate are realized, and the rolling quality and efficiency of the thick steel plate are greatly increased.

Description

technical field [0001] The invention relates to the field of rolling, in particular to a heating device, a rolling device and a rolling method for on-line rolling of thick steel plates. Background technique [0002] Looking back on the development of the iron and steel industry over the past hundred years, since the beginning of the 20th century, iron and steel materials have become the main basic materials for global applications, and about 90% of the steel products are produced by rolling. High-efficiency steel rolling industry and technology make rolling steel always the main way of forming steel in the steel industry. The production of steel by rolling method not only has high productivity and variety, but also is easy to realize mechanization and automation. However, when the thicker steel billet is rolled, due to the thicker billet, if the heating of the billet is insufficient, it cannot reach the required rolling temperature, and the large deformation generated during...

AI Technical Summary

Problems solved by technology

However, when a thicker steel billet is rolled, due to the larger thickness of the billet, if the heating of the billet is insufficient, it cannot reach the required rolling temperature, and the large deformation generated during rolling It will directly cause the billet to tear, and even damage the rolling mill in serious cases, causing huge losses

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