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Headless continuous casting and rolling ferrite rolling method and device of low/micro-carbon steel coil for deep drawing

A continuous casting, continuous rolling, and ferrite technology, applied in the field of metallurgical steel rolling, can solve the problems of poor performance stability, complex process flow, low production efficiency, etc. Effect

Pending Publication Date: 2018-01-19
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of complex technological process, low production efficiency, high energy consumption, high cost, low yield and poor performance stability existing in the existing low-carbon / micro-carbon steel production method and device for deep drawing, and provide A ferritic rolling method and device for producing low-micro-carbon steel coils for deep drawing by endless continuous casting and rolling

Method used

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  • Headless continuous casting and rolling ferrite rolling method and device of low/micro-carbon steel coil for deep drawing
  • Headless continuous casting and rolling ferrite rolling method and device of low/micro-carbon steel coil for deep drawing
  • Headless continuous casting and rolling ferrite rolling method and device of low/micro-carbon steel coil for deep drawing

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Experimental program
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Effect test

Embodiment 1

[0041] According to the chemical composition and mass percentage of low carbon steel: C: 0.06%, Si: 0.10%, Mn: 0.25%, B: 0.0003%, Ti: 0.005%, Cr: 0.01%, Als: 0.060%, P: 0.019%, S: 0.006%, N: 0.0049%, the rest is Fe and unavoidable impurities for smelting. The slab is cast in a continuous casting machine, the temperature of the continuous casting ladle is 1545°C, the casting speed is 4m / min, and the thickness of the slab is 80mm. It is directly sent to the rough rolling unit for rough rolling. The rough rolling temperature is 990°C-950°C. After rough rolling, the thickness of the intermediate billet is 7mm. The intermediate billet enters the cooling channel to control the temperature, the cooling speed is 0.3°C / s, the rolling shear head is descaled by high-pressure water, the pressure of the descaling water is 35MPa, the finishing rolling unit is finished rolling, and the finishing rolling temperature is controlled at 800°C-730°C. Lubricated rolling can be used in 3 passes, an...

Embodiment 2

[0043] According to the chemical composition and mass percentage of low carbon steel: C: 0.04%, Si: 0.06%, Mn: 0.20%, B: 0.0008%, Ti: 0.030%, Cr: 0.10%, Als: 0.042%, P: 0.013%, S: 0.014%, N: 0.0040%, and the rest is Fe and unavoidable impurities for smelting. The slab is cast in a continuous casting machine, the temperature of the continuous casting ladle is 1547°C, the casting speed is 5m / min, and the thickness of the slab is 95mm. It is directly sent to the rough rolling unit for rough rolling. The rough rolling temperature is 1000°C-960°C. After rough rolling, the thickness of the intermediate billet is 13mm. The intermediate billet enters the cooling channel to control the temperature, the cooling speed is 2°C / s, the rolling shear head is descaled by high-pressure water, the pressure of the descaling water is 33MPa, the finishing rolling unit is finished rolling, and the finishing rolling temperature is controlled at 810°C-740°C. Lubricated rolling can be used in 2 passes...

Embodiment 3

[0045] According to the chemical composition and mass percentage of micro-carbon steel: C: 0.018%, Si: 0.03%, Mn: 0.15%, B: 0.0015%, Ti: 0.012%, Cr: 0.25%, Als: 0.025%, P: 0.010%, S: 0.009%, N: 0.0031%, and the rest is Fe and unavoidable impurities for smelting. The slab is cast in a continuous casting machine, the temperature of the continuous casting ladle is 1550°C, the casting speed is 6m / min, and the thickness of the slab is 110mm. It is directly sent to the rough rolling unit for rough rolling. The rough rolling temperature is 1100°C-970°C. After rough rolling, the thickness of the intermediate billet is 20mm. The intermediate billet enters the cooling channel to control the temperature, the cooling speed is 4°C / s, the rolling shear head is descaled by high-pressure water, the descaling water pressure is 33MPa, the finishing rolling unit is finished rolling, the finishing rolling temperature is controlled at 825°C-755°C, and finally 1 pass can be lubricated and rolled, ...

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Abstract

The invention discloses a headless continuous casting and rolling ferrite rolling method and device of a low / micro-carbon steel coil for deep drawing and belongs to the field of metallurgy steel rolling. According to the headless continuous casting and rolling ferrite rolling method and device of the low / micro-carbon steel coil for deep drawing, continuous casting for blank forming, rough rollingof a rough rolling unit, temperature control of a cooling channel, descaling of high-pressure water, ferrite rolling of a finishing mill group, cooling of a layer cooling device, high-speed flying shear and shunt winding and coiling of a reeling machine are carried out. By means of the method and device, the problems that heating / soaking of a heating furnace is needed before rough rolling of a conventional hot rolling process, and cooling with temperature retaining is needed due to the fact that the temperature difference of rough rolling of an austenite zone and finish rolling of a ferrite zone is large and the problems that for thin slab casting and rolling processes with CSP as a respective, heating / soaking or induction heating for temperature supplementing of a heating furnace is needed are solved, the advantages that the arrangement is compact, the investment is small, the production efficiency is high, safety and reliability are achieved, energy is saved, environmental friendliness is achieved, and the cost is reduced are achieved, and the low-carbon / micro-carbon steel coil for deep drawing is produced through headless continuous casting and rolling and ferrite rolling.

Description

technical field [0001] The invention belongs to the technical field of metallurgical steel rolling, and in particular provides a ferrite rolling method and device for producing low-micro-carbon steel coils for deep drawing by endless continuous casting and rolling. Background technique [0002] Thin slab continuous casting and rolling technology is a new technology that appeared in the late 1980s. Mainly include the CSP process of German SMS company, which adopts roller hearth furnace for heating, soaking and heat preservation, and the CPR process cooperated with German Thyssen factory can realize semi-endless rolling; the ISP process of German MDS company, the intermediate billet is heated by induction and hot coil box-type soaking, which can realize semi-endless rolling; the FTSR process of Italian Danieli company has liquid core reduction technology, which is heated and kept in a roller hearth tunnel furnace and then rough rolled. There are thermal insulation roller tabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/46B21B15/00B21B45/02B21B45/08B21B37/74C22C38/02C22C38/04C22C38/14C22C38/18C22C38/06C22C38/32
Inventor 康永林田鹏朱国明秦哲郭呈宇
Owner UNIV OF SCI & TECH BEIJING
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