Rolling technology method for ultra-thin ultra-wide steel plate

Abstract

The invention provides a rolling technology method for an ultra-thin ultra-wide steel plate. The rolling technology method for the ultra-thin ultra-wide steel plate comprises the steps that the soaking temperature of a steel pushing type heating furnace is controlled to range from 1200 DEG C to 1250 DEG C, it is guaranteed that time of a soaking zone is longer than or equal to 60 minutes, and the head and tail temperature difference of a billet is smaller than or equal to 30 DEG C; dog bone rolling is adopted in a rough rolling forming stage and the last pass of a broadening stage; supporting rolls are of a flat roll type and has chamfers in the edges, and the lower roll diameter of a working roll is 2 mm to 5 mm larger than the upper roll diameter of the working roll; the deference of the manipulator centering degree is no larger than 10 mm; the rolling pass of a rough mill is controlled according to the eighth pass to the tenth pass, fine rolling is carried out according to the sixth pass to the eighth pass, reduction of the last three passes is gradually decreased, and the reduction rate of the last three passes is controlled to be 10 % to 15%; two eleven-roll straighteners are used for straightening. According to the rolling technology method for the ultra-thin ultra-wide steel plate, a 2800-mm mill can be used for producing the steel plate with the thickness smaller than 10 mm and the width larger than 2600 mm.

Description

technical field

[0001] The invention relates to the field of metallurgy, and belongs to a rolling method of a medium-thick plate, in particular to a rolling process method of an ultra-thin and ultra-wide steel plate. Background technique

[0002] According to the traditional rolling theory, the maximum width of the finished product that the rolling mill can produce is the length of the work roll minus a certain size. For example, the 2800mm plate rolling mill is mainly used to produce steel plates with a thickness of 10mm or more and a width of 2400mm or less. However, steel plates with a thickness of less than 10mm and a width of more than 2400mm need a larger rolling mill to be rolled, usually with a 3800mm rolling mill or a 5000mm rolling mill. However, if a steel plate with a thickness of less than 10mm and a width of more than 2400mm is rolled with a 3800mm rolling mill or a 5000mm rolling mill, especially a steel plate with a thickness of less than 10mm and a width of ...

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