CN103752626B - The semi-automatic water-cooled of ACC is utilized to improve the production method of plate surface quality - Google Patents

The semi-automatic water-cooled of ACC is utilized to improve the production method of plate surface quality Download PDF

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Publication number
CN103752626B
CN103752626B CN201310749605.6A CN201310749605A CN103752626B CN 103752626 B CN103752626 B CN 103752626B CN 201310749605 A CN201310749605 A CN 201310749605A CN 103752626 B CN103752626 B CN 103752626B
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China
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steel plate
semi
acc
cooling
plate
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CN201310749605.6A
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Chinese (zh)
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CN103752626A (en
Inventor
李鑫磊
沈开照
田鹏
董占斌
刘鑫
王锁涛
李涛
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秦皇岛首秦金属材料有限公司
首钢总公司
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Priority to CN201310749605.6A priority Critical patent/CN103752626B/en
Publication of CN103752626A publication Critical patent/CN103752626A/en
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Abstract

Utilize the semi-automatic water-cooled of ACC to improve a production method for plate surface quality, belong to Heavy Plate Production technical field.Thin specification steel plate 8-16mm adopts semi-automatic water-cooled pattern, while guarantee final cooling temperature is constant, improves roller table speed 1.8-2.5m/s, adds collector and opens quantity 8-13 group, increase 12-24m between cooling zone.For long-time oxidation, because oxide-film tack is poor, the general more complicated of oxide layer structure formed, the continuous coo1ing after short time oxidation is conducive to forming the good oxide layer of tack, and the oxidation of oxygen supply condition to carbon steel has certain influence.Semi-automatic cooling, under the prerequisite of not losing mechanical property of steel plate index, gives full play to the flexibility of ACC cooling, improves continuity and the compactness of thin specification steel plate cooling uniformity and scale on surface, thus significantly improve the surface quality of steel plate.

Description

The semi-automatic water-cooled of ACC is utilized to improve the production method of plate surface quality
Technical field
The invention belongs to Heavy Plate Production technical field, particularly relate to a kind of production method utilizing the semi-automatic water-cooled of ACC to improve plate surface quality.
Background technology
Generally be equipped with accelerating cooling equipment (ACC) after current heavy and medium plate mill, the ACC acceleration cooling system designed by western mark is representative wherein, and generally adopted by domestic each Heavy Plate Plant, its refrigerating mode is divided into automatic mode, semiautomatic-mode and manual mode.Because automatic mode automaticity is high, final cooling temperature can realize self adaptation, temperature control precision high, mainly automatic mode is adopted in actual production, this pattern, by cooling jig, opens collector number and roller table speed according to setting parameters such as steel plate specification, finishing temperature, final cooling temperature, cooling rates.But by the restriction of model, general roller table speed comparatively slow (< 1.8m/s), collector is opened and is comparatively concentrated (opening continuously), especially to thin specification steel plate (8-16mm), open collector number few (≤6 groups), steel plate easily produces the even phenomenon of inhomogeneous cooling, affects continuity and the compactness of surface of steel plate iron scale, and then has influence on the surface quality of cold rear steel plate.And semiautomatic-mode can set the parameters such as roller table speed, collector opening ways and quantity flexibly according to steel plate thickness difference, the present invention makes full use of the feature of semiautomatic-mode, compared with automatic mode, adopt higher roller table speed (>=1.8m/s), open more collector quantity (> 6 groups), adopt the mode that collector interval is opened as far as possible, improve cooling uniformity, realize controlling surface of steel plate scale structure, improve continuity and the compactness of surface of steel plate iron scale, improve the object of plate surface quality.
Summary of the invention
The object of the present invention is to provide a kind of production method utilizing the semi-automatic water-cooled of ACC to improve plate surface quality, based on the acceleration cooling system (Acceleratedcontrolcooling that western mark designs, ACC), long 24 meters of this equipment, amount to 15 groups of collectors, often organize collector and be made up of 1 U-shaped upper header and 2 lower collector pipe, cooling zone roller table speed 0-2.5m/s, collector water yield 200-1500L/ ㎡ * min, refrigerating mode mainly contains: automatic mode, semiautomatic-mode and manual mode.Semiautomatic-mode refers to and utilizes program to be input in model the cooling parameter of different-thickness specification steel plate (comprising the collector water yield, roller table speed, collector unlatching group number and mode etc.), when rolling rear steel plate and entering cooling zone, ACC can according to steel plate thickness Automatically invoked cooling code.Concrete technology step is as follows:
First be the cooling code input model of 8-16mm steel plate by thickness specification, be specially: steel plate thickness 8-12.5mm, roller table speed setting 2.2-2.5m/s, opens the 1st, 3,5,7,9,11,13,15 group of collector; Steel plate thickness 12.5-14.5mm, roller table speed setting 2.0-2.2m/s, opens the 1st, 2,3,5,6,7,9,11,13,15 group of collector; Steel plate thickness 14.5-16mm, roller table speed setting 1.8-2.0m/s, opens the 1st, 2,3,4,5,6,7,8,9,10,11,13,15 group of collector.Upper header water yield 200-250L/ ㎡ * min, lower collector pipe water yield 300-350L/ ㎡ * min.
When rolling needs the steel plate carrying out semi-automatic water-cooled, ACC refrigerating mode is switched to semi-automatic, send the information such as steel plate specification by milling train secondary to ACC secondary after steel plate rolls, ACC secondary cools according to the corresponding code of thickness information Automatically invoked of rolling rear steel plate received.
Thin specification steel plate (8-16mm) adopts semi-automatic water-cooled pattern, while guarantee final cooling temperature is constant, improves roller table speed (1.8-2.5m/s), adds collector and opens quantity (8-13 group), increase (12-24m) between cooling zone.For long-time oxidation, because oxide-film tack is poor, the general more complicated of oxide layer structure formed, the continuous coo1ing after short time oxidation is conducive to forming the good oxide layer of tack, and the oxidation of oxygen supply condition to carbon steel has certain influence.Semi-automatic cooling, under the prerequisite of not losing mechanical property of steel plate index, gives full play to the flexibility of ACC cooling, improves continuity and the compactness of thin specification steel plate cooling uniformity and scale on surface, thus significantly improve the surface quality of steel plate.
This production method has been applied in the middle of the production of the kinds such as 8-16mm specification low-alloy, the deck of boat, container panel, bridge steel, structural steel at present, significantly improves plate surface quality, improves CSAT and product competitiveness.
Accompanying drawing explanation
Fig. 1 is plate surface quality photo after semi-automatic water-cooled.
Detailed description of the invention
Embodiment 1: bridge steel Q345qD, thickness 9.5mm
Semi-automatic cooling code:
Embodiment 2: deck of boat GL-A, thickness 13.5mm
Semi-automatic cooling code:
Embodiment 3: low-alloy Q345B, thickness 15mm
Semi-automatic cooling code:
To sum up, improve continuity and the compactness of thin specification steel plate cooling uniformity and scale on surface according to the inventive method, thus significantly improve the surface quality of steel plate.

Claims (1)

1. utilize the semi-automatic water-cooled of ACC to improve a production method for plate surface quality, it is characterized in that, concrete technology step is as follows:
First by the cooling code input model of steel plate, be specially:
Steel plate thickness 8-12.5mm, roller table speed setting 2.2-2.5m/s, opens the 1st, 3,5,7,9,11,13,15 group of collector;
Steel plate thickness 14.5-16mm, roller table speed setting 1.8-2.0m/s, opens the 1st, 2,3,4,5,6,7,8,9,10,11,13,15 group of collector; Upper header water yield 200-250L/ ㎡ * min, lower collector pipe water yield 300-350L/ ㎡ * min;
When rolling needs the steel plate carrying out semi-automatic water-cooled, ACC refrigerating mode is switched to semi-automatic, send steel plate specification information by milling train secondary to ACC secondary after steel plate rolls, ACC secondary cools according to the corresponding code of thickness information Automatically invoked of rolling rear steel plate received;
Be applicable to the deck of boat, container panel, bridge steel.
CN201310749605.6A 2013-12-30 2013-12-30 The semi-automatic water-cooled of ACC is utilized to improve the production method of plate surface quality CN103752626B (en)

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CN105624383B (en) * 2016-01-04 2017-09-15 河北钢铁股份有限公司邯郸分公司 A kind of production method for improving high-strength cut deal product surface quality
CN107695113B (en) * 2017-09-13 2019-02-22 首钢集团有限公司 A method of it swinging cooling technique and produces think gauge bridge steel
CN110883103A (en) * 2019-11-29 2020-03-17 张家港宏昌钢板有限公司 Method for controlling uniformity of cooling temperature of rolled medium plate for ultra-fast cooling system

Citations (4)

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CN101306438A (en) * 2008-06-23 2008-11-19 秦皇岛首秦金属材料有限公司 Accelerated stream cooling device cooling technique integration method
CN101353717A (en) * 2008-09-11 2009-01-28 南京钢铁股份有限公司 Process for producing high strength hardened and tempered steel by steekle mill on-line quenching
CN101745551A (en) * 2008-12-11 2010-06-23 宝山钢铁股份有限公司 Free cooling method of hot rolling band steel
GB2484917A (en) * 2010-10-25 2012-05-02 Siemens Vai Metals Tech Ltd Method of cooling a longitudinally profiled plate

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JP4449991B2 (en) * 2007-02-26 2010-04-14 Jfeスチール株式会社 Apparatus and method for cooling hot-rolled steel strip

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CN101306438A (en) * 2008-06-23 2008-11-19 秦皇岛首秦金属材料有限公司 Accelerated stream cooling device cooling technique integration method
CN101353717A (en) * 2008-09-11 2009-01-28 南京钢铁股份有限公司 Process for producing high strength hardened and tempered steel by steekle mill on-line quenching
CN101745551A (en) * 2008-12-11 2010-06-23 宝山钢铁股份有限公司 Free cooling method of hot rolling band steel
GB2484917A (en) * 2010-10-25 2012-05-02 Siemens Vai Metals Tech Ltd Method of cooling a longitudinally profiled plate

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Address after: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei

Co-patentee after: Shougang Group Co. Ltd.

Patentee after: Qinhuangdao Shouqin Metal Material Co., Ltd.

Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei

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Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd.

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Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing

Patentee after: Shougang Group Co. Ltd.

Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei

Co-patentee before: Shougang Group Co. Ltd.

Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd.