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Thin-specification RE700MC steel prepared based on fully headless thin slab continuous casting and rolling process and preparation method thereof

A thin slab continuous casting, thin gauge technology, applied in the field of steelmaking, can solve the problems of limiting the application prospect of 700MC steel, chemical inclusions and segregation, high production cost and energy consumption, and achieves high spheroidization degree and microstructure. The effect of organization, stable product performance, energy consumption and low cost

Inactive Publication Date: 2018-11-13
RIZHAO STEEL HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

700MC high-strength steel can meet the requirements of manufacturing automobile frame and car bottom parts and other workpieces. At present, the production technology of 700MC steel at home and abroad is mainly based on the traditional thick slab continuous rolling production technology. The production process has long process distances, production costs and At the same time, the existing 700MC steel has defects such as serious chemical composition inclusions and segregation, poor dimensional stability of the plate, serious surface decarburization, and poor mechanical properties, which severely limit the application prospects of 700MC steel

Method used

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  • Thin-specification RE700MC steel prepared based on fully headless thin slab continuous casting and rolling process and preparation method thereof
  • Thin-specification RE700MC steel prepared based on fully headless thin slab continuous casting and rolling process and preparation method thereof

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[0026] Aiming at the technical problems existing in the prior art in the background technology, the present invention provides a thin-gauge RE700MC steel prepared based on an all-endless thin slab continuous casting and rolling process and a preparation method thereof. The thin-gauge RE700MC steel of the present invention includes the following qualities Fractional raw material components: C: 0.04%-0.06%, Si: 0.15%-0.50%, Mn: 1.3%-1.8%, Als: 0.02%-0.04%, Nb: 0.010%-0.06%, Ti: 0.04% -0.13%, S: ≤0.0020%, P: ≤0.012%, N: ≤0.005%, and the balance is Fe; the product thickness of RE700MC steel is 1.0mm~3.5mm.

[0027] The preparation method of the thin-gauge RE700MC steel based on the continuous casting and rolling process of the all-endless thin slab of the present invention comprises the following steps in sequence: selecting raw materials, converter smelting, LF refining furnace refining, RH refining furnace refining, continuous casting process, rough Rolling process, induction fu...

Embodiment 1

[0031] The composition design of the thin-gauge RE700MC steel prepared based on the full endless thin slab continuous casting and rolling process is as follows: C: 0.04%, Si: 0.2%, Mn: 1.8%, Als: 0.03%, Nb: 0.010%, Ti: 0.13 %, S: ≤0.0020%, P: ≤ 0.012%, N: ≤0.005%, and the balance is Fe;

[0032] The preparation method of thin gauge RE700MC steel based on the full endless thin slab continuous casting and rolling process is as follows:

[0033] (1) Design and select raw materials according to the above composition;

[0034] (2) The raw materials in the step (1) are sequentially smelted in a converter, refined in an LF refining furnace, and refined in a RH refining furnace to obtain molten steel;

[0035] (3) The molten steel is sequentially passed through the continuous casting process, the rough rolling process, the induction furnace heating process, the finishing rolling process, the laminar flow cooling process, the coiling process, and the flattening coiling process in the ...

Embodiment 2

[0043] The composition design of the thin gauge RE700MC steel prepared based on the full endless thin slab continuous casting and rolling process is as follows: C: 0.05%, Si: 0.2%, Mn: 1.6%, Als: 0.03%, Nb: 0.040%, Ti: 0.09 %, S: ≤0.0020%, P: ≤ 0.012%, N: ≤0.005%, and the balance is Fe;

[0044] The preparation method of thin gauge RE700MC steel based on the full endless thin slab continuous casting and rolling process is as follows:

[0045] (1) Design and select raw materials according to the above composition;

[0046] (2) The raw materials in the step (1) are sequentially smelted in a converter, refined in an LF refining furnace, and refined in a RH refining furnace to obtain molten steel;

[0047] (3) The molten steel is sequentially passed through the continuous casting process, the rough rolling process, the induction furnace heating process, the finishing rolling process, the laminar flow cooling process, the coiling process, and the flattening coiling process in the ...

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Abstract

The invention discloses thin-specification RE700MC steel prepared based on a fully headless thin slab continuous casting and rolling process and a preparation method of the thin-specification RE700MCsteel. The RE700MC steel is prepared from, by mass, 0.04%-0.06% of C, 0.15%-0.50% of Si, 1.3%-1.8% of Mn, 0.02%-0.04% of Als, 0.010%-0.06% of Nb, 0.04%-0.13% of Ti, 0.0020% or less of S, 0.012% or less of P, 0.005% or less of N and the balance Fe. The product thickness of the RE700MC steel is 1.0mm-3.5mm. The preparation method comprises the working procedures of raw material selection, convertersmelting, LF refining furnace refining, RH refining furnace refining, continuous casting, continuous rolling, induction furnace heating, finish rolling, cooling and curling. The RE700MC steel in the scheme has the advantages that mechanical performance is excellent, the plate size is stable, the inclusion spheroidization degree is high, and the microscopic structure is excellent. Meanwhile, the preparation method is short in technological process, low in energy consumption and cost and stable in product performance.

Description

technical field [0001] The invention relates to the field of steelmaking, in particular to thin-gauge RE700MC steel prepared on the basis of an all-endless thin slab continuous casting and rolling process and a preparation method thereof. Background technique [0002] With the development of the automobile industry, in order to improve the carrying capacity of automobiles, prolong the service life of automobiles and meet the requirements of energy saving, material saving, and safe driving, it has become the development trend of today's automobile industry to produce automobile beams with high-strength steel plates. High-strength steel for automotive structures not only needs to have high strength, plasticity, toughness, good fatigue characteristics and formability, but also requires high purity of steel, high degree of spheroidization of inclusions, and excellent microstructure. 700MC high-strength steel can meet the requirements of manufacturing automobile frame and car bot...

Claims

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Application Information

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IPC IPC(8): C21D8/02C21D9/52C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C33/04
CPCC21D8/0205C21D8/0221C21D9/52C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 秦哲梁宗仁朱经涛陈良郑万任谢基表喻尧赵文吴进赵锐徐正彪陈统徐由标安守勇陈金伟陆显然孙庆强季伟斌郑旭涛杜建全温永葆赵寿云
Owner RIZHAO STEEL HLDG GROUP
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