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 probl

Method used

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

Examples

Experimental program
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Example Embodiment

[0092] Example 1:

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

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

[0095] 1) Choose a suitable finishing mill back-up roll, a flat roll profile with chamfered edges on the edge of the roll profile, with a side chamfering ratio of 3.5:200. Due to fewer rolling plans, choose a work r...

Example Embodiment

[0100] Example 2:

[0101] This example uses a 2800mm rolling mill to produce 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 stripping method adopts cutting surface stripping. Rough rolling and finishing rolling are rolled 18 passes, of which 10 passes are 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, respectively. The reduction rate is above 10% (except the first pass), and the finish rolling is 8 passes, the pass reductions are 10.91, 6.67, 5.28, 2.87, 2.48, 1.97, 1.49, 0.88, and the pass reductions are all Above 13%, the specific process is as follows:

[0102] 1) Choose a suitable finishing mill back-up roll, a flat roll profile with chamfered edges on the edge of the roll profile, with a side chamfering ratio of 3.5:200. Due to fewer rolling plans, choose a work roll profile of ﹢0.06mm, The roll is r...

Example Embodiment

[0107] Example 3: This example uses a 2800mm rolling mill 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 normal stripping method is adopted. Rough rolling and finishing rolling were rolled 18 passes, of which 10 passes were rough rolled, and the pass reductions were 19.86, 28.45, 25.66, 20.47, 17.89, 17.2, 11.13, 14.24, 14.38, 12.71, and pass reductions The rates are all above 12% (except for the first pass). Finish rolling 8 passes, pass reductions are 4.27, 7.13, 4.08, 3.67, 3.5, 2.56, 2.05, 1.27, and pass reductions are all above 10%. The specific process is as follows:

[0108] 1) Choose a suitable finishing mill back-up roll, a flat roll profile with chamfered edges on the edge of the roll profile, with a side chamfering ratio of 3.5:200. Due to fewer rolling plans, choose a work roll profile of ﹢0.06mm, The roll is rolled after 8 hours of use. The effe...

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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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