Method for reducing oxidizing and jamming of high-carbon steel intermediate billet in induction heating area

A technology of induction heating and blank oxidation card, which is applied in the field of iron oxide scale mitigation and control, can solve problems such as affecting the coiling rate, affecting the stable operation of IH, and heating module deformation, and achieves the effect of improving efficiency.

Inactive Publication Date: 2018-05-08
RIZHAO STEEL HLDG GROUP
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Problems solved by technology

[0002] In the thin slab continuous casting and rolling line equipped with induction heating (IH), during the production of medium and high carbon steel, the oxidation reaction on the surface of the intermediate slab in the IH area is intense, and the produced iron oxide scales burst and fall off and accumulate between the various modules of the IH, resulting in modules and slabs Iron sheets are formed between the blanks to block the overseas Chinese couplets, as shown in the attached drawings of the instructions figure 1 and figure 2 As shown, in severe cases, the deformation of the heating module will affect the stable operation of the IH, and the production mode of the steel coil must be changed to the production mode of the medium plate to clean up the iron sheet accumulated in the IH area, which seriously affects the economic indicators such as the coiling rate.

Method used

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  • Method for reducing oxidizing and jamming of high-carbon steel intermediate billet in induction heating area
  • Method for reducing oxidizing and jamming of high-carbon steel intermediate billet in induction heating area
  • Method for reducing oxidizing and jamming of high-carbon steel intermediate billet in induction heating area

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Embodiment 1

[0037] A method for reducing the oxidation jamming of high-carbon steel intermediate billets in the induction heating area. The process route is: molten steel-ladle turret-tundish-crystallizer-sector section-rough rolling R1-R2-R3-induction heating furnace-high pressure Descaling - finishing rolling F1-F2-F3-F4-F5 - laminar cooling - coiler;

[0038] The composition is designed as: C: 0.17~0.70%, Si: 0.10~0.14%, Mn: 0.12~0.22%, Alt: 0.010~0.030%, S: ≤0.01%, P: ≤0.017%, O≤0.01%, N : ≤0.006%.

[0039] Tundish superheat 15-30 ℃, continuous casting casting speed ≥ 4.8m / min.

[0040] Rough rolling R3 outlet temperature ≥ 950 ℃ to ensure the induction heating inlet temperature, R3 outlet intermediate billet thickness 13-14mm.

[0041] The outlet temperature of induction heating is 1120°C-1125°C mainly to control the finish rolling temperature, and the finish rolling temperature is 800-815°C.

[0042] Layer cooling is carried out according to the cooling rate of 50% in the previou...

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Abstract

The invention discloses a method for reducing oxidizing and jamming of a high-carbon steel intermediate billet in an induction heating area. The technology route is molten steel, a big ladle rotationtable, a tundish, a crystallizer, a fan-shaped section, rough rolling R1-R2-R3, an induction heating furnace, high-pressure scale removal, finish rolling F1-F2-F3-F4-F5, laminar cooling and a coilingmachine. The technology effectively solves the problem about jamming of oxide scale cracking in an intermediate billet area. Benefits are increased.

Description

technical field [0001] The invention relates to the technical field of scale mitigation and control, in particular to a method for reducing oxidation jamming of a high-carbon steel intermediate billet in an induction heating area. Background technique [0002] In the thin slab continuous casting and rolling line equipped with induction heating (IH), during the production of medium and high carbon steel, the oxidation reaction on the surface of the intermediate slab in the IH area is intense, and the produced iron oxide scales burst and fall off and accumulate between the various modules of the IH, resulting in modules and slabs Iron sheets are formed between the blanks to block the overseas Chinese couplets, as shown in the attached drawings of the instructions figure 1 and figure 2 As shown, in severe cases, the deformation of the heating module will affect the stable operation of the IH. The production mode of the steel coil needs to be changed to the production mode of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C33/00
CPCC22C38/02C22C33/00C22C38/001C22C38/04C22C38/06
Inventor 季伟斌韩翔孙庆强赵寿云王庆赵文郭敏
Owner RIZHAO STEEL HLDG GROUP
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