A coiling control method for thin slab continuous casting and rolling to produce hot-formed steel

A thin slab continuous casting and hot-forming steel technology, applied in metal rolling, metal rolling, tool manufacturing, etc., can solve the problems of flat coils in hot-formed steel, reduce volume expansion, and increase coil tightness , Improve the effect of winding force

Active Publication Date: 2022-03-08
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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  • A coiling control method for thin slab continuous casting and rolling to produce hot-formed steel
  • A coiling control method for thin slab continuous casting and rolling to produce hot-formed steel
  • A coiling control method for thin slab continuous casting and rolling to produce hot-formed steel

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]

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

Embodiment 3

[0092] To produce hot-formed steel BR1500HS with a thickness of 1.5mm, the actual control target values ​​are shown in Table 4:

[0093] Table 4: 1.5mm BR1500HS control target value

[0094]

[0095] 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 rolling of thin slabs. During the coiling process, when the coil diameter of the hot-rolled strip on the reel reaches the preset coil diameter value, the tension control mode is switched from constant tension control to constant torque control; wherein, the value of the coil diameter preset value The range is 1200mm~1400mm; in the constant tension control stage of the coiling process, the total unit coiling tension of the hot-rolled strip is controlled to be 18~49N / mm 2 ; During the coiling process, control the tension value between the pinch roller and the reel to account for 30% to 50% of the total coiling tension value; during the coiling process, control the coiling temperature of the hot-rolled strip at 700°C above. The control method provided by the invention can effectively solve the flat coil problem of hot forming 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 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 to produce hot-formed steel: hot metal desulfurization→converter→argon blowing→LF→continuous casting→soaking furnace→finish rol...

Claims

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Application Information

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Patent Type & Authority Patents(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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