Rolling method capable of prolonging service life of roller for conventional hot continuous rolling thin-specification strip steel

A roll life, thin gauge technology, applied in metal rolling and other directions, can solve the problems of high rolling speed, defects, affecting thin gauge, ultra-thin gauge product stability, batch and high-efficiency rolling, etc. Guarantee the effect of the process

Inactive Publication Date: 2020-09-08
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the improvement of conventional hot continuous rolling process equipment and control technology, the dimensional accuracy, shape quality and performance stability of thin-gauge and ultra-thin-gauge products can reach a good control level, but due to the large rolling load of thin-gauge products, The rolling speed is fast, the temperature is high, the pure rolling time is long, and the frequent strip threading and tail throwing of conventional hot continuous rolling often cause the oxide film of the finishing roll to fall off and press into the surface of the strip during the rolling process, resulting in quality defects, and The uneven wear of the rolls is also sensitive to the rolling stability of the strip, which often leads to quality problems and production accidents such as deviation, rolling, and wave shape of the strip, which directly affects the stability of thin and extremely thin products. Batch and efficient rolling

Method used

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  • Rolling method capable of prolonging service life of roller for conventional hot continuous rolling thin-specification strip steel

Examples

Experimental program
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Effect test

specific Embodiment

[0026] Purpose of the invention: a rolling technology for conventional hot continuous rolling of thin-gauge steel strips. The technology is specifically to control the surface damage caused by the peeling off of the oxide film of the finish rolling work rolls or the uneven wear of the rolls during the rolling process of thin gauges, especially ultra-thin gauges. and rolling stability issues. Innovative, scientific, reasonable and accurate rolling schedule arrangement and flexible process control technology combined with rough rolling mode and intermediate cooling are adopted to control the oxide film shedding of rolls and uneven wear of rolls, so as to achieve conventional hot continuous rolling with thin specifications Consistent high-quality rolling of strip steel.

[0027] The specific technical solutions are as follows:

[0028] 1) Thermal system: the slab is heated by a conventional walking beam heating furnace, the furnace temperature is 1210-1250°C, and the temperature...

Embodiment 1

[0044] This implementation example adopts a 1450mm conventional hot continuous rolling mill to roll a thin specification of 34Km, as follows:

[0045] 1) Steel type for rolling: SAPH440, slab exit temperature 1230-1240°C, soaking time 30min, slab cold loading.

[0046] 2) The rough rolling adopts the "3+3" rolling mode. After rolling, it is coiled by the hot coil box for heat preservation and uniform temperature, and then sent to the finishing rolling unit.

[0047] 3) The starting rolling temperature of the finishing rolling unit is 1030°C, the reverse water spraying and roll gap cooling water of the finished product stand are turned on, the roll gap cooling water of the finished product stand is turned on, and the lubricating rolling is put into use.

[0048] 4) Rolling schedule preparation: front section SAPH440, specification 2.3×1160mm, 19Km; transition section: SPHC, specification 3.0-2.75mm×1160-1200mm; rear section SAPH440, specification 1.8×1180mm, 15Km.

[0049] Imp...

Embodiment 2

[0052] This implementation example adopts a 1450mm conventional hot continuous rolling mill to roll a thin specification of 32Km, as follows:

[0053] 1) Rolled steel grades: SAPH440 and QSTE420, the slab exit temperature is 1230-1250°C, the soaking time is 25min, and the slab is hot delivered and hot charged.

[0054] 2) The rough rolling adopts the "1+5" rolling mode. After rolling, it is coiled by the hot coil box for heat preservation and uniform temperature, and then sent to the finishing rolling unit.

[0055] 3) The starting rolling temperature of the finishing rolling unit is 1030°C, the reverse water spraying and roll gap cooling water of the finished product stand are turned on, the roll gap cooling water of the finished product stand is turned on, and the lubricating rolling is put into use.

[0056] 4) Rolling schedule preparation: front section SAPH440, specification 1.5×1100mm, 20Km; transition section: Q235G, specification 3.0-3.5mm×1250mm; back section QSTE420,...

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Abstract

The invention discloses a rolling method, particularly discloses a rolling method capable of prolonging service life of a roller for conventional hot continuous rolling thin-specification strip steel,and belongs to the technical field of steel plate steel strip rolling processes. The rolling method capable of prolonging the service life of the roller for the conventional hot continuous rolling thin-specification strip steel is simple in process and low in investment cost. The rolling method prolongs the roller surface oxide film damage and falling time to achieve the aim of prolonging the service life of the roller by adopting of segmented quantitative rolling arrangement, rolling pass flexible section of a rough rolling unit and cooling control of finished product rolling, and finished product rolling is a finishing mill mechanism.

Description

technical field [0001] The invention relates to a rolling method, in particular to a rolling method for prolonging the service life of a roll used for conventional hot continuous rolling of thin-gauge strip steel, and belongs to the technical field of steel plate and steel strip rolling technology. Background technique [0002] Hot-rolled thin-gauge steel with thickness h≤2.50mm and ultra-thin-gauge steel strip with thickness h<2.0mm are high-value-added and high-tech products. For hot continuous rolling, the stable, high-quality and high-efficiency rolling control of thin gauge and ultra-thin gauge hot strip steel is a world-class technical problem. Generally speaking, short-process CSP, ESP and casting and rolling production lines have certain advantages in technology, equipment and control for rolling thin and ultra-thin gauge hot-rolled strip steel. However, for conventional hot continuous rolling, it is very difficult to roll thin gauges, especially extremely thin g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/26
CPCB21B1/26
Inventor 刘勇郭宏童永李海波郭韬刘富贵付芹
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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