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Coiling control method for producing hot-formed steel by continuous casting and continuous rolling of thin slab

A thin slab continuous casting and hot-forming steel technology, which is applied in metal rolling, metal rolling, tool manufacturing, etc., can solve the problems of flat coils in hot-formed steel, so as to improve the total tension of the inner ring and increase the coil tightness degree, the effect of improving the winding force

Active Publication Date: 2020-08-25
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a coiling control method for producing hot-formed steel by continuous casting and rolling of thin slabs, in order to solve or partly solve the technical problem that hot-formed steel is prone to flat coils after coiling

Method used

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  • Coiling control method for producing hot-formed steel by continuous casting and continuous rolling of thin slab
  • Coiling control method for producing hot-formed steel by continuous casting and continuous rolling of thin slab
  • Coiling control method for producing hot-formed steel by continuous casting and continuous rolling of thin slab

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Production of hot-formed steel BR1500HS with a thickness of 1.2mm, the actual control target values ​​are shown in Table 2:

[0083] Table 2: 1.2mm BR1500HS control target value

[0084] control process method unit Specific parameters Strip steel unit tension N / mm 2

[0085] Control effect: There is no coiling and flat coiling problem throughout the year.

Embodiment 2

[0087] Production of hot-formed steel BR1500HS with a thickness of 1.4mm, the actual control target values ​​are shown in Table 3:

[0088] Table 3: 1.4mm BR1500HS control target value

[0089]

[0090]

[0091] Control effect: There is no coiling and flat coiling problem throughout the year.

Embodiment 3

[0093] To produce hot-formed steel BR1500HS with a thickness of 1.5mm, the actual control target values ​​are shown in Table 4:

[0094] Table 4: 1.5mm BR1500HS control target value

[0095] control process method unit Specific parameters Strip steel unit tension N / mm 2

[0096] Control effect: There is no coiling and flat coiling problem throughout the year.

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Abstract

The invention discloses a coiling control method for producing hot-formed steel by continuous casting and continuous rolling of a thin slab. The method comprises the steps that when coiling is started, the expansion amount of a coiler from a pre-expanded position to a expansion position is controlled to be more than 14 mm; and in the coiling process, when the steel coil diameter of hot-rolled strip steel on the coiler reaches a coiling diameter preset value, a tension control mode is transformed from a constant-tension control to a constant-torque control, wherein the coiling diameter preset value ranges from 1200 mm to 1400 mm; during the constant-tension control stage in the coiling process, the total unit coiling tension of the hot-rolled strip steel is controlled to be 18 N / mm2-49 N / mm2; in the coiling process, the tension value between a pinch roller and a drum is controlled to be 30%-50% of the total coiling tension value; and in the coiling process, the coiling temperature of the hot-rolled strip steel is controlled to be above 700 DEG C. The control method can effectively solve the problem of flat coiling of the hot-formed steel.

Description

technical field [0001] The present application relates to the technical field of hot-formed steel production and manufacturing, in particular to a coiling control method for producing hot-formed steel by continuous casting and rolling of thin slabs. Background technique [0002] The hardenability of hot-formed steel is improved through composition design and micro-alloy addition. After the hot stamping process, the strength of the material in the delivery state can be increased from 500 to 600 MPa to more than 1500 MPa, which can effectively improve the anti-collision performance of the parts and realize the light weight of the car body. Quantitatively, hot stamping steel is mainly used in body structural parts, especially safety structural parts to prevent intrusion. [0003] The main production process route of thin slab continuous casting and rolling CSP process for producing hot-formed steel: hot metal desulfurization→converter→argon blowing→LF→continuous casting→soaking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B15/00B21C47/00B21C47/06
CPCB21B15/00B21C47/003B21C47/06B21B2015/0057
Inventor 余晓龙田军利高智王成张亦辰李波
Owner 武汉钢铁有限公司
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