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

A process method, steel plate technology, applied in the direction of metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of low rolling hit rate and so on

Active Publication Date: 2014-11-19
LIUZHOU IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a rolling process method for ultra-thin and ultra-wide steel plates to solve the problem of low rolling hit rate of ultra-thin and ultra-wide steel plates (thickness below 10 mm and width above 2600 mm)

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0093] This example uses a 2800mm rolling mill to produce 8mm×2600mm Q235B steel plates. The actual size of the billet is 220mm*1810mm*1117mm, the rolling thickness is 7.6mm (negative tolerance rolling), and the steel row method adopts the cutting surface row steel. Rough rolling and finishing rolling are rolled 18 times in total, of which rough rolling is 10 times, and the pass reductions are 20, 24, 22, 20, 17

[0094] , 22, 8 (the final pass of widening), 14, 15, 16, and the reduction rate is above 12% (except the first pass and the final pass of widening). There are 8 passes of finishing rolling, the pass reductions are 8.84, 7.73, 6.8, 3.34, 2.89, 2.23, 1.68, 0.99, and the reduction ratios are all above 10%. The specific process is as follows:

[0095] 1) Select a suitable back-up roll for the finishing mill, a flat roll with a chamfered edge, and a chamfered edge ratio of 3.5:200. Due to less rolling plans, select the work roll with a roll profile of ﹢0.06mm. The rolls...

Embodiment 2

[0101] This example uses a 2800mm rolling mill to produce a 6mm×2600mm Q345R steel plate. The actual size of the billet is 220mm*1580mm*1093mm, the rolling thickness is 7.6mm (negative tolerance rolling), and the steel row method adopts the cutting surface row steel. There are 18 passes of rough rolling and finish rolling, including 10 passes of rough rolling, and the pass reductions are 20, 28, 23.83, 22.99, 18.41, 17.5, 20.68, 18.2, 20.43, 13.7, 10.61. The reduction rate is above 10% (except the first pass), and there are 8 passes for finishing rolling. Above 13%, the specific process is as follows:

[0102] 1) Select a suitable back-up roll for the finishing mill, a flat roll with a chamfered edge, and a chamfered edge ratio of 3.5:200. Due to less rolling plans, select the work roll with a roll profile of ﹢0.06mm. The rolls were rolled after 3 hours of use. The effective cooling length of the roll is 2000mm. Before rolling, take advantage of the shift time to measure t...

Embodiment 3

[0107] Embodiment 3: In this example, a 2800mm rolling mill is used to produce a 10mm×2700mm Q235B steel plate. The actual size of the billet is 220mm*1500mm*1928mm, the rolling thickness is 9.8mm (negative tolerance rolling), and the steel row method adopts normal steel row. A total of 18 passes for rough rolling and finish rolling, including 10 passes for rough rolling, and the pass reductions are 19.86, 28.45, 25.66, 20.47, 17.89, 17.2, 11.13, 14.24, 14.38, 12.71. Rates are above 12% (except for the first pass). There are 8 passes of finishing rolling, the reductions of the passes are 4.27, 7.13, 4.08, 3.67, 3.5, 2.56, 2.05, 1.27, and the reductions of the passes are all above 10%. The specific process is as follows:

[0108] 1) Select a suitable back-up roll for the finishing mill, a flat roll with a chamfered edge, and a chamfered edge ratio of 3.5:200. Due to less rolling plans, select the work roll with a roll profile of ﹢0.06mm. The rolls are rolled after 8 hours of...

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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 ...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B37/28B21B37/18B21B37/74B21B37/46
Inventor 卢春宁沈敏罗永恒李瑞仁李磊文宪刚刘岽黄瑞贤武辉沈士杰吴铠彭永青覃纲李可发陈裕朝梁金奎苏春凌
Owner LIUZHOU IRON & STEEL
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